San José (SJO) to Cancun (CUN): 784 miles (1,261 km) great-circle, about 2h 05m nonstop by our estimate. Cheapest fare observed: $309 round-trip on Aeromexico, with 1 stop, departing June 28, 2026.
$309 round-trip, Aeromexico AM657, departing 2026-06-28 at 07:30, returning 2026-07-03. The recorded itinerary left on a Sunday, returning on a Friday 5 nights later; the fare was observed 64 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $309, it ranked 10th of the 30 round-trip fares we recorded from SJO (median $412). That is 39.4 cents per great-circle mile (round-trip price over one-way distance), above the SJO median of 21.6 cents across 29 round-trip routes.
Routes from SJO of similar length: Bogota (780 mi) at $267 and Quito (807 mi) at $358.
SJO to CUN is the only one of 30 SJO routes where Aeromexico priced cheapest. It is the 23rd longest of the 30 routes we track from SJO.
Of 25 departure airports with a fare to Cancun, San José (SJO) ranked 9th at $309. Lowest: $127 from Mexico City (MEX); highest: $2060 from Perth (PER); 4 nonstop. Cheapest-fare airlines (routes): Frontier (6), Aeromexico (4), Air Canada (3), American Airlines (2), Viva Aerobus (2) and AirAsia (1), plus 7 more.
That depends on your passport and trip, so check the official source for Mexico: Instituto Nacional de Migracion (Mexico). Connecting elsewhere? Check that country's transit rules too.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/Costa_Rica, America/Cancun; flight time is our estimate.