Denver (DEN) to San José (SJO): 2,416 miles (3,888 km) great-circle, about 5h 20m nonstop by our estimate. Cheapest fare observed: $496 round-trip on United Airlines, with 1 stop, departing June 20, 2026.
$496 round-trip, United Airlines UA1253, departing 2026-06-20 at 21:10, returning 2026-06-27. The recorded itinerary left on a Saturday, returning on a Saturday 7 nights later; the fare was observed 56 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $496, it ranked 25th of the 30 round-trip fares we recorded from DEN (median $204). That is 20.5 cents per great-circle mile (round-trip price over one-way distance), above the DEN median of 16.1 cents across 30 round-trip routes.
Routes from DEN of similar length: Boston (1,750 mi) at $243 and Miami (1,708 mi) at $247.
United Airlines had the cheapest fare on 3 of 30 DEN routes. It is the 6th longest of the 30 routes we track from DEN.
Of 2 departure airports with a fare to San José, Denver (DEN) ranked 2nd at $496. Lowest: $288 from Panama City (PTY); highest: $496 from Denver (DEN); 1 nonstop. Cheapest-fare airlines (routes): Copa (1) and United Airlines (1).
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/Denver, America/Costa_Rica; flight time is our estimate.