Quick Answer
Best overall option: Take the Meitetsu Airport Line from Centrair Airport to Kanayama Station (28 minutes, ¥870), then transfer to the Aonami Line to Legoland Japan Station (24 minutes, ¥560). Total journey: 75-90 minutes for ¥1,430. Cheapest option: Airport Limousine Bus to Nagoya Station (¥1,000-¥1,500) plus Aonami Line. Fastest door-to-door: Taxi (60-75 minutes, ¥15,000-¥20,000). Key transfer station: Kanayama Station (名古屋金山駅) for seamless Meitetsu to Aonami Line connection.
🚆 Train Transportation: The Most Efficient & Scenic Route
Train travel offers the optimal balance of speed, cost, and reliability. Two primary routes exist: 1) Meitetsu + Aonami Line (recommended), and 2) Limited Express + Local Trains. Both require transfers but provide different experiences.
Detailed Step-by-Step Guide
- Step 1: Centrair Airport to Kanayama Station
- Board the Meitetsu Airport Line (μ-SKY Limited Express) from Chubu Centrair Airport Station (located in terminal)
- Travel time: 28 minutes (non-stop)
- Frequency: Every 30 minutes, 5:30 AM - 11:30 PM
- Cost: ¥870 (reserved seat), ¥760 (unreserved)
- Train features: Large luggage racks, free WiFi, power outlets
- Step 2: Transfer at Kanayama Station
- Follow signs for "Aonami Line (Linimo)" - 5-7 minute walk within station
- Purchase Aonami Line ticket or use IC card (Suica/Pasmo)
- Transfer time: 10-15 minutes (well-signed, escalators available)
- Step 3: Kanayama to Legoland Japan Station
- Board Aonami Line towards "Fujigaoka"
- Travel time: 24 minutes (10 stops)
- Alight at "Legoland Japan Station" (終点 - final stop)
- Cost: ¥560 (adult), ¥280 (child)
- Frequency: Every 6-10 minutes
- Step 4: Legoland Station to Park Entrance
- 3-minute walk via covered walkway
- Clear signage in English/Japanese
- Elevator available for strollers/wheelchairs
Alternative Train Route via Nagoya Station
For travelers coming from Tokyo/Osaka via Shinkansen:
| Route | Time | Cost | Transfers | Best For |
|---|---|---|---|---|
| Shinkansen + Meitetsu + Aonami Tokyo→Nagoya→Kanayama→Legoland |
3.5-4 hours total | ¥11,000-¥14,000 | 2 transfers | Combining Legoland with other destinations |
| Airport Train + Aonami (Recommended) Centrair→Kanayama→Legoland |
75-90 minutes | ¥1,430 | 1 transfer | Direct from airport to Legoland |
Train Type Comparison
- μ-SKY Limited Express: Premium service, reserved seats only, extra comfort, panoramic windows
- Meitetsu Regular Express: Cheaper (¥760), non-reserved, slightly longer (35 minutes)
- Aonami Line: Automated guideway transit, themed Legoland trains during peak seasons
Luggage Considerations
Meitetsu trains accommodate suitcases up to 160cm (total dimensions) in overhead racks. Larger luggage requires front/rear car storage. Takkyubin (luggage delivery) services available at airport to ship bags directly to your hotel (¥1,500-¥2,500 per piece, next-day delivery).
Ticketing & Discounts
- Combination Tickets: Airport-Legoland round trip + Legoland ticket discounts available at airport counters
- IC Cards: Suica, Pasmo, TOICA, ICOCA all accepted on both lines
- Meitetsu 1-Day Pass: ¥1,200 for unlimited Meitetsu travel (not including Aonami Line)
- Group Discounts: 10% off for 6+ people purchasing together
Accessibility Information
All stations have elevators, tactile paving, and wheelchair-accessible gates. Meitetsu trains have priority seating and wheelchair spaces. Aonami Line stations are fully accessible with level boarding.
✈️ Domestic Flight Options: When It Makes Sense
While most travelers will use ground transportation, domestic flights can be viable if: 1) Coming from distant Japanese cities (Sapporo, Fukuoka), 2) Combining with international arrival, or 3) When time is critical but Shinkansen is unavailable.
Flight Routes to Consider
| Departure City | Airport | Airlines | Flight Time | Typical Cost (One-Way) | Total Door-to-Door Time to Legoland |
|---|---|---|---|---|---|
| Tokyo (Haneda) | HND → NGO | ANA, JAL, Skymark | 1 hour | ¥8,000-¥15,000 | 4-5 hours (with airport transit) |
| Osaka (Itami) | ITM → NGO | ANA | 45 minutes | ¥7,000-¥12,000 | 3.5-4.5 hours |
| Sapporo (New Chitose) | CTS → NGO | ANA, JAL, Peach | 1 hour 50 minutes | ¥10,000-¥20,000 | 5-6 hours |
| Fukuoka | FUK → NGO | ANA, JAL, Jetstar | 1 hour 20 minutes | ¥9,000-¥16,000 | 4.5-5.5 hours |
Why Flying Is Usually NOT Recommended
Key consideration: "Door-to-door" time versus "air time." Example from Tokyo:
- Flight option: 1 hour to Haneda + 90 min check-in/security + 1 hour flight + 30 min deplane + 75 min to Legoland = 5+ hours
- Shinkansen option: 30 min to Tokyo Station + 1.5 hour Shinkansen + 75 min to Legoland = 3.75 hours
- Cost comparison: Flight (¥8,000-15,000) vs Shinkansen (¥11,000) - similar cost but train is faster
When Flying Makes Sense
- From distant cities: Sapporo to Nagoya: Flight (5-6 hours) vs Train (12+ hours with multiple transfers)
- Last-minute travel: When Shinkansen seats are sold out during Golden Week/Obon
- Frequent flyer benefits: Using mileage points for free flights
- Overnight connections: Red-eye flights from Hokkaido/Okinawa
Airport Ground Transportation
Upon arrival at Chubu Centrair Airport, follow the same train instructions above. Allow 60-90 minutes from landing to exiting airport (immigration, baggage claim, customs for international arrivals).
Budget Airline Considerations
Peach, Jetstar, and Spring Japan offer cheaper fares but:
- Strict baggage allowances (15-20kg checked, 7kg carry-on)
- Additional fees for seat selection, meals, checked bags
- Less flexible change policies
- Often use secondary airports further from city centers
🚌 Airport Bus & Limousine Service: The Budget-Friendly Choice
For travelers prioritizing cost over speed, airport buses offer significant savings. Two main services operate: 1) Airport Limousine Bus to Nagoya Station, and 2) Meitetsu Bus Center routes.
Detailed Bus Route Information
| Service Name | Departure Point (Airport) | Arrival Point (Nagoya) | Travel Time | Frequency | One-Way Fare | Operating Hours |
|---|---|---|---|---|---|---|
| Airport Limousine Bus | Terminal 1, Bus Stop 2 | Nagoya Station (Meitetsu Bus Center) | 45-60 minutes | Every 20-30 minutes | ¥1,000 (adult) ¥500 (child) |
6:30 AM - 10:30 PM |
| Meitetsu Bus (via Kanayama) | Terminal 1, Bus Stop 3 | Kanayama Station East Exit | 35-50 minutes | Every 40 minutes | ¥1,200 | 7:00 AM - 9:00 PM |
| Direct Bus to Hotels | Terminal 1, Bus Stop 4 | Major Nagoya hotels (Hilton, Marriott, etc.) |
60-90 minutes | Every 60-90 minutes | ¥1,300-¥1,800 | 8:00 AM - 8:00 PM |
Complete Journey from Bus to Legoland
- Step 1: Airport to Nagoya/Kanayama by Bus
- Purchase tickets at airport bus counters (Level 1 Arrivals)
- Buses are comfortable with air conditioning, luggage compartments
- Free WiFi on most limousine buses
- No reservations needed for most routes (except during peak seasons)
- Step 2: Transfer to Aonami Line
- From Nagoya Station Bus Center: 10-minute walk to Nagoya Station subway
- From Kanayama Station: Direct connection to Aonami Line within station
- Transfer time: 15-20 minutes including walking
- Step 3: Aonami Line to Legoland
- Same train details as train section
- Total bus+train time: 90-120 minutes
- Total cost: ¥1,560-¥2,060
Advantages of Bus Travel
- Cost savings: 30-40% cheaper than train for solo travelers
- Luggage friendly: Large undercarriage compartments for multiple suitcases
- Direct to hotels: Some routes stop at major hotel entrances
- Comfort: Reclining seats, footrests on premium buses
Disadvantages & Limitations
- Traffic dependent: Rush hour (7-9 AM, 5-7 PM) can double travel time
- Less frequent: Buses every 20-40 min vs trains every 6-10 min
- Multiple transfers: Bus + train + walking = more complex
- No overnight service: Last bus at 10:30 PM, first at 6:30 AM
Special Bus Services
- Legoland Package Buses: Seasonal direct buses during peak periods (check official website)
- Group Charter: Private buses available for groups of 20+ (¥25,000-¥40,000 per bus)
- Luggage Delivery Integration: Some buses offer combined luggage delivery service to hotels
Booking & Tickets
Advanced booking recommended during: Golden Week (late April-early May), Obon (mid-August), New Year (late Dec-early Jan). Purchase at airport counters or online via Meitetsu website. Round-trip discounts available (10-15% off).
🚕 Taxi & Private Transfer: Premium Door-to-Door Service
Important: Taxis are 10-15 times more expensive than public transportation. Recommended only for specific situations.
Taxi Fare Structure & Estimates
| Vehicle Type | Base Fare | Distance Rate | Estimated Total (Airport→Legoland) | Travel Time | Capacity |
|---|---|---|---|---|---|
| Standard Taxi | ¥710 (first 1.5km) | ¥90 per 280m thereafter | ¥15,000-¥18,000 | 60-75 minutes | 4 passengers |
| Jumbo Taxi/Van | ¥820 (first 1.5km) | ¥100 per 280m thereafter | ¥18,000-¥22,000 | 60-75 minutes | 7-9 passengers |
| Premium/HiAce | ¥2,500 (fixed base) | Included up to 50km | ¥25,000-¥30,000 | 60-75 minutes | 10+ passengers |
Additional Charges & Fees
- Highway tolls: ¥1,500-¥2,000 (Isewangan Expressway)
- Late-night surcharge: 20% extra (10:00 PM - 5:00 AM)
- Luggage fee: Large suitcases may incur ¥200-¥500 per piece
- Waiting time: ¥90 per 1.5 minutes when stationary
- Reservation fee: ¥300-¥500 for pre-booked taxis
When Taxi Makes Financial Sense
- Groups of 4+: Split cost becomes ¥3,750-¥4,500 per person (comparable to train)
- Late-night arrivals: After last train (11:30 PM) or bus (10:30 PM)
- Early morning departures: Before first train (5:30 AM) or bus (6:30 AM)
- Special needs: Mobility issues, large equipment, medical conditions
- Extreme weather: Typhoons, heavy rain, extreme heat
- Business travel: Time-critical meetings, expense account coverage
Private Transfer Services
Pre-booked private cars offer fixed pricing and English-speaking drivers:
- Klook/KKday: ¥18,000-¥25,000 for 4-person sedan
- Welcome Pickups: ¥22,000-¥28,000 with English driver
- Hotel arranged: Most hotels can arrange transfers at 10-20% premium
- Advantages: Fixed price, meet & greet, flight tracking, child seats available
Taxi Stand Locations & Procedure
- Location: Terminal 1, Exit 8 (24-hour taxi stand)
- Procedure: Queue in line, tell driver "Legoland Japan, Nagoya" (レゴランド・ジャパン)
- Payment: Cash (preferred), credit cards (Visa/Mastercard accepted, Amex sometimes)
- Receipt: Ask for "ryoshusho" (領収書) for reimbursement
Money-Saving Taxi Alternatives
- Taxi to nearest station + train: Save 50-60% by taking taxi only to Kanayama Station
- Taxi sharing: Some hotels offer shared taxi services during peak seasons
- Corporate accounts: Major taxi companies offer corporate rates for multiple trips
Safety & Regulations
All airport taxis are licensed, metered, and insured. Drivers must display identification. Never use unlicensed "white plate" cars - these are private vehicles without proper insurance. Official taxis have green license plates.
💰 Complete Cost Comparison & Ticketing Guide
This comprehensive comparison includes all hidden costs and realistic travel times.
Definitive Transportation Comparison Table
| Transport Method | Total Time (Door-to-Door) | Adult Fare (One-Way) | Child Fare (6-11) | Transfers | Best For | Worst For |
|---|---|---|---|---|---|---|
| Train (Meitetsu + Aonami) Airport → Kanayama → Legoland |
75-90 minutes | ¥1,430 | ¥720 | 1 (at Kanayama) | Most travelers, families, first-timers | Late night arrivals (after 11:30 PM) |
| Airport Bus + Train Bus to Nagoya Sta + Aonami Line |
90-120 minutes | ¥1,560-¥2,060 | ¥780-¥1,030 | 2 (bus to train, train to train) | Budget travelers, solo backpackers | Rush hour (heavy traffic delays) |
| Taxi (Direct) Airport → Legoland direct |
60-75 minutes | ¥15,000-¥20,000 (total for taxi) |
Same (shared cost) | 0 (direct) | Groups of 4+, late arrivals, special needs | Solo travelers, budget-conscious |
| Private Transfer Pre-booked car with driver |
60-75 minutes | ¥18,000-¥30,000 (total for vehicle) |
Same (shared cost) | 0 (direct) | Business travel, families with infants | Budget travelers |
| Flight + Ground From distant Japanese cities |
4-6 hours total | ¥8,000-¥20,000 (flight only) |
50-75% of adult fare | 2-3 (flight + train/bus) | Coming from Sapporo/Fukuoka | Coming from Tokyo/Osaka (train faster) |
Money-Saving Ticket Combinations
- Meitetsu & Legoland Combo Ticket: Round-trip airport train + Legoland admission discount (save 10-15%)
- Nagoya Subway 1-Day Pass + Airport Train: ¥1,200 for unlimited subway + discount on airport train
- Family Discounts: Groups of 4+ get 10% off on Meitetsu trains when purchasing together
- Advanced Purchase Discount: Buy train tickets 7+ days in advance for 5-10% savings
Where to Purchase Tickets
| Ticket Type | Purchase Location | Payment Methods | Online Booking | Notes |
|---|---|---|---|---|
| Meitetsu Train Tickets | Centrair Airport Station counter, vending machines | Cash, Credit Cards, IC Cards | Yes (Meitetsu website) | English machines available |
| Airport Bus Tickets | Bus ticket counter (Arrivals Level 1) | Cash, Credit Cards | Limited availability | Round-trip discounts available |
| Aonami Line Tickets | Kanayama Station vending machines | Cash, IC Cards | No | Use Suica/Pasmo for convenience |
| Taxi/Private Car | Taxi stand, online booking | Cash, Credit Cards | Yes (Klook, KKday, Welcome Pickups) | Fixed price when booked online |
IC Cards (Suica/Pasmo/TOICA)
Highly recommended for seamless travel. All transportation modes accept IC cards:
- Purchase: At airport station vending machines (¥2,000 including ¥500 deposit)
- Coverage: Trains, buses, subways, convenience stores, vending machines
- Refund: Deposit and balance refundable at airport station before departure
- Mobile versions: Suica available on iPhone (Apple Pay)
Peak Season Price Increases
Expect 10-30% price increases during:
- Golden Week: Late April to early May (book 2-3 months in advance)
- Obon Festival: Mid-August (especially Aug 13-16)
- New Year: Dec 28 - Jan 5
- School Holidays: Late March, late July-early September
🧳 Traveler Experience & Practical Navigation Tips
Beyond schedules and prices, these practical insights will make your journey smoother.
First-Hand Navigation Experience
- Airport to Train Station: Follow green "Train" signs from Arrivals. Station is connected to terminal (5-minute walk).
- Kanayama Station Transfer: This is the most confusing part. Exit Meitetsu train, follow blue "Aonami Line" signs upstairs, purchase ticket at pink machines.
- Legoland Station Exit: Take Exit 1 for direct covered walkway to park entrance. Exit 2 leads to parking lot and hotel.
- Language Barrier: Most signs are bilingual (English/Japanese). Station staff speak basic English. Have "Legoland Japan Station" written in Japanese (レゴランド・ジャパン駅) on your phone.
Luggage Solutions
- Takkyubin (Luggage Delivery):
- Airport Service: Yamato Transport counter at Arrivals (Level 1)
- Cost: ¥1,500-¥2,500 per suitcase to Nagoya hotels
- Time: Next-day delivery (send morning, receive next morning)
- Same-day delivery: Available before 12 PM for ¥3,000-¥4,000
- Coin Lockers:
- Airport: Various sizes (¥300-¥700 per day) at station
- Kanayama Station: Limited lockers, often full by 10 AM
- Legoland: Large lockers near entrance (¥500-¥1,000 per day)
- Hotel Storage: Most hotels will store luggage before check-in/after check-out for free.
Family-Specific Advice
- Strollers: All trains and stations accommodate folded strollers. Aonami Line has dedicated stroller spaces.
- Child Tickets: Ages 0-5: free, 6-11: half price, 12+: adult price. Proof of age may be requested.
- Breastfeeding/Nursing: Nursing rooms at airport, Kanayama Station, and Legoland Station.
- Kid-Friendly Amenities: Family restrooms at all stations, baby changing facilities widely available.
Seasonal Considerations
| Season | Transport Impact | Recommendations |
|---|---|---|
| Summer (Jun-Aug) Hot, humid, rainy season |
Air conditioning essential, occasional train delays from heavy rain | Choose air-conditioned trains, carry water, allow extra time |
| Winter (Dec-Feb) Cold, minimal snow |
Heated trains and stations, rare service disruptions | Dress in layers, trains are well-heated |
| Peak Seasons Golden Week, Obon, New Year |
Crowded trains, sold-out buses, longer wait times | Book everything in advance, consider taxi for guaranteed seats |
| Typhoon Season Sep-Oct |
Possible service cancellations, flight delays | Check JR News for updates, have backup plans |
Technology & Apps
- Navigation Apps: Google Maps (excellent for train schedules), Japan Travel by Navitime (more detailed)
- Translation Apps: Google Translate (camera function for signs)
- WiFi Access: Free WiFi at airport, paid WiFi on some trains, purchase pocket WiFi at airport
- Ticket Apps: Mobile Suica (iPhone), Jorudan for route planning
Common Mistakes to Avoid
- Missing last train: Last Meitetsu train departs 11:30 PM, plan accordingly
- Wrong Kanayama exit: Use East Exit for Aonami Line connection
- Overlooking luggage space: Reserve luggage space on μ-SKY trains during peak seasons
- Currency exchange: Exchange money at airport (better rates) not at station
- Time underestimation: Add 30% buffer during rush hours and peak seasons
📝 Essential Planning Tips & Final Recommendations
Top 5 Recommendations Based on Traveler Type
| Traveler Type | Recommended Transport | Why It's Best | Booking Timeline |
|---|---|---|---|
| First-time Visitors | Train (Meitetsu + Aonami) | Straightforward, well-signed, optimal balance | Day of travel (no advance needed) |
| Budget Travelers | Airport Bus + Aonami Line | Cheapest option, luggage-friendly | Day before during peak seasons |
| Families with Young Children | Train or Private Transfer | Stroller access, fewer transfers, comfort | 1-2 weeks in advance for private transfer |
| Late Night Arrivals (after 11 PM) | Taxi or Airport Hotel | Only option, door-to-door convenience | Advance booking for airport hotel |
| Business Travelers | Taxi or Private Transfer | Time efficiency, reliable, professional | As soon as flight is confirmed |
Money-Saving Strategies
- Combination Tickets: Always check for train+attraction combo deals at airport counters
- Group Discounts: 4+ travelers save 10% on trains when purchasing together
- Off-Peak Travel: Travel between 10 AM-4 PM for less crowded, sometimes cheaper trains
- Luggage Forwarding: Use Takkyubin to avoid large locker fees and travel light
- IC Card Usage: Small discount compared to paper tickets, plus convenience
Time Management Tips
- Allow buffer: Add 30 minutes to estimated times during rush hour (7-9 AM, 5-7 PM)
- Connection timing: Trains depart precisely on schedule - arrive at platform 2-3 minutes early
- Airport procedures: International arrivals need 60-90 minutes for immigration, baggage, customs
- Peak season adjustment: During holidays, add 50% more time for crowds and queues
Accessibility Resources
- Wheelchair Assistance: Available at all stations with 24-hour notice (contact station)
- Visual Impairment: Tactile paving throughout stations, audio announcements
- Hearing Impairment: Visual displays on trains showing next station
- Service Animals: Permitted on all public transportation
Emergency Contacts & Information
- Lost & Found: Centrair Airport: +81 569-38-1191; Meitetsu: +81 52-582-2101
- Taxi Complaints: Nagoya Taxi Association: +81 52-971-7176
- Tourist Information: Centrair Airport Tourist Center (Arrivals, open 7 AM-10 PM)
- Emergency: Police: 110, Ambulance/Fire: 119
Final Checklist Before You Go
- ✓ Purchase IC card (Suica/Pasmo) at airport
- ✓ Download Google Maps and offline Nagoya area
- ✓ Write "Legoland Japan Station" in Japanese on phone/paper
- ✓ Check train/bus schedules for your arrival time
- ✓ Have cash (¥10,000-¥15,000) for transportation and emergencies
- ✓ Consider luggage forwarding if carrying large suitcases
- ✓ Note last train/bus times if arriving late
❓ Frequently Asked Questions (FAQs)
Is there a direct train from Chubu Centrair Airport to Legoland Japan?
No direct train exists. All routes require at least one transfer. The most efficient route is: Meitetsu Airport Line to Kanayama Station (28 minutes), then transfer to Aonami Line to Legoland Japan Station (24 minutes). Total travel time: 75-90 minutes with one transfer at Kanayama.
What is the cheapest way to get from Chubu Centrair Airport to Legoland Japan?
The cheapest option is the airport limousine bus to Nagoya Station (¥1,000) plus Aonami Line train (¥560) = ¥1,560 total. However, for better convenience-to-cost ratio, the train route via Kanayama (¥1,430) is recommended despite being slightly more expensive.
What is the fastest transportation method from Chubu Centrair Airport to Legoland Japan?
Fastest door-to-door: Taxi (60-75 minutes, ¥15,000-¥20,000). Fastest public transport: Train via Kanayama Station (75-90 minutes, ¥1,430). Note: During rush hour traffic, taxi may be slower than train.
Can I use the JR Pass from Chubu Centrair Airport to Legoland Japan?
No, the JR Pass cannot be used for the complete journey. The route uses Meitetsu (private railway) and Aonami Line trains, not covered by JR Pass. Only JR portions (like Shinkansen to Nagoya from other cities) would be covered. From the airport itself, you must pay separately.
How much does a taxi cost from Chubu Centrair Airport to Legoland Japan?
¥15,000-¥20,000 one-way depending on traffic, time, and vehicle size. Includes base fare (¥710), distance charges, highway tolls (¥1,500-¥2,000), and possible late-night surcharges. Groups of 4 can split cost to ¥3,750-¥5,000 per person.
Are there overnight/early morning buses from Chubu Centrair Airport to Legoland Japan?
No dedicated overnight buses. Last airport bus departs 10:30 PM, first morning bus starts 6:30 AM. For arrivals between these times, options are: taxi, airport hotel, or waiting at airport until morning transport resumes. Some capsule hotels near airport offer cheap overnight stays.
What is the total travel time from airport to Legoland including transfers?
Minimum 75 minutes (train), typically 90-120 minutes (bus+train), depending on connections and waiting times. Breakdown: Airport to Kanayama (28 min) + transfer (15 min) + Kanayama to Legoland (24 min) + walking (10 min) = 77 minutes minimum under perfect conditions.
What is the best transportation for families with young children?
Recommended: Train (Meitetsu + Aonami) for stroller accessibility and family seating. Alternative: Private transfer with car seats (book in advance). Avoid buses with toddlers due to lack of proper seatbelts. All stations have elevators and family restrooms.
Can I store my luggage at the airport or stations?
Yes. Airport: Coin lockers (¥300-¥700/day) and luggage delivery services. Kanayama Station: Limited lockers (often full by mid-morning). Legoland: Large lockers near entrance (¥500-¥1,000). Better option: Use Takkyubin to forward luggage directly to your hotel.
Is it better to fly or take Shinkansen from Tokyo to visit Legoland?
Shinkansen is faster and more convenient. Tokyo to Nagoya via Shinkansen: 1.5 hours + 75 minutes to Legoland = 3.75 hours total. Tokyo to Nagoya via flight: 1 hour flight + 3 hours airport procedures/transfers = 4+ hours. Shinkansen also offers more flexibility and city-center to city-center convenience.
Do I need to book train/bus tickets in advance?
For regular travel: No, tickets are readily available. For peak seasons (Golden Week, Obon, New Year): Yes, book 2-4 weeks in advance. Trains can sell out during these periods. Regular weekdays and off-peak seasons require no advance booking.
What happens if my flight is delayed and I miss the last train?
Options: 1) Taxi (expensive but available 24/7), 2) Airport hotel (Book in advance for better rates), 3) Wait at airport until first train (5:30 AM). Travel insurance may cover unexpected hotel/taxi costs due to flight delays.