Washington Dulles to Juan Santamaría
2043 miles great-circle distance, typically flown in 4h 31m with 5 airlines operating direct service from Washington Dulles (IAD) to Juan Santamaría (SJO). Cheapest fares are usually in January (around $249 return), with peak prices in August (around $747). Departures on a Tuesday tend to undercut weekend prices on this corridor.
Flying from Washington Dulles
Washington Dulles International is United Airlines' Mid-Atlantic hub and the larger of the two Washington-region airports. Metro's Silver Line extension opened in 2022, running from the airport's underground station directly to downtown Washington DC in around 50 minutes for $7. International long-haul through IAD is the deepest of any DC-area airport, with United, BA, Virgin Atlantic, Lufthansa, Air France, Qatar, Emirates and Ethiopian all running daily flights to global hubs.
Arriving in San José
Juan Santamaría International serves San José, Costa Rica's capital, 17 km west of the centre. Tuasa bus runs to downtown San José for 690 CRC; taxis cost $25–$30. Fares from US Pacific and Texas hubs peak December–April (US winter demand) with cheaper rates in the May–November green season. SJO is the gateway for Manuel Antonio, Arenal and the Pacific coast resorts; LIR (Liberia) is closer to Guanacaste's Pacific beaches.
Who flies IAD to SJO?
| Airline | IATA | Flight time | Cabin |
| United Airlines | UA | 4h 31m | Economy |
| Frontier Airlines | F9 | 4h 31m | Economy |
| American Airlines | AA | 4h 31m | Economy |
| Delta Air Lines | DL | 4h 31m | Economy |
| JetBlue Airways | B6 | 4h 31m | Economy |
5 carriers fly direct on this corridor. Frequencies vary by season — summer and winter holiday peaks see additional flights.
Best time to fly IAD→SJO
Synthesised from 12-month price aggregates. Cheapest months in green, peak in red.
Estimated baseline. Prices update on a 30-day cadence as Travelpayouts data refreshes. Cheapest day-of-week typically Tuesday.
Washington to San José FAQs
Direct flights from Washington Dulles (IAD) to Juan Santamaría (SJO) take approximately 4h 31m for the 2043-mile journey, plus 30–60 minutes of taxi, climb and descent. Total airport-to-airport time depends on cruise winds and air-traffic queueing on approach.
January is typically the cheapest month on this route, with one-way fares from $249. August is the peak — expect prices 2–3× higher. Book 4–8 weeks ahead for best fares; last-minute prices on this corridor rise sharply inside two weeks of departure.
5 carriers operate direct service from Washington Dulles (IAD) to Juan Santamaría (SJO): United Airlines, Frontier Airlines, American Airlines, Delta Air Lines and JetBlue Airways. Frequencies vary by season and carrier — United Airlines typically operates the highest weekly count on this corridor.
Visa-free for US passport holders up to 90 days. Always check travel.state.gov for the latest entry requirements before booking.
Juan Santamaría (SJO) is the primary international airport for San José. Allow 30–60 minutes for the ground transfer by train, express bus, taxi or rideshare depending on traffic and time of day. See the airport's official website for current train and shuttle timetables.