Quick Answer
For most travelers, the quickest and most convenient way from Manaus Airport to the Mercado Municipal is by taxi or rideshare app (like 99 Pop), taking 15-25 minutes and costing R$ 40-70 ($8-$14 USD). For the most authentic and budget-friendly option, take the public bus (line 306 or 813) for about R$ 5 ($1 USD), but expect a journey of 60-90 minutes with potential stops.