Mexico City (MEX) to Sao Paulo (SAO): 4,619 miles (7,433 km) great-circle, about 9h 45m nonstop by our estimate. Cheapest fare observed: $820 round-trip on Viva Aerobus, with 2 stops, departing July 18, 2026.
$820 round-trip, Viva Aerobus VB1374, departing 2026-07-18 at 23:05, returning 2026-08-22. The recorded itinerary left on a Saturday, returning on a Saturday 35 nights later; the fare was observed 84 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $820, it ranked 21st of the 30 round-trip fares we recorded from MEX (median $329). That is 17.8 cents per great-circle mile (round-trip price over one-way distance), close to the MEX median of 18.3 cents across 30 round-trip routes.
Routes from MEX of similar length: Madrid (5,633 mi) at $929 and Paris (5,716 mi) at $881.
Viva Aerobus had the cheapest fare on 13 of 30 MEX routes. It is the 10th longest of the 30 routes we track from MEX.
Of 20 departure airports with a fare to Sao Paulo, Mexico City (MEX) ranked 14th at $820. Lowest: $59 from Rio de Janeiro (GIG); highest: $1830 from Brisbane (BNE); 4 nonstop. Cheapest-fare airlines (routes): Copa (4), Arajet (3), Avianca (2), TAAG Angola Airlines (2), Azul (1) and Cathay Pacific (1), plus 7 more.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/Mexico_City, America/Sao_Paulo; flight time is our estimate.