Dulles → San Jose
Dec 21, 2026 · one way
IAD → SJO1 adulteconomyOne way
7 flight options · 4 airlines
Nonstop flights
One-stop flights
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Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.
| Exact travel dates | Airline | Flights | Total price | Price issued (UTC) |
|---|---|---|---|---|
| 2026-12-21 · one way | United Airlines | UA2052 | $399.00 | 2026-10-29T01:07:59Z |
| 2026-12-21 · one way | Frontier Airlines | F94707 + F9215 | $217.00 | 2026-10-29T01:07:59Z |
| 2026-12-21 · one way | Avianca | AV591 + AV609 | $273.00 | 2026-10-29T01:07:59Z |
| 2026-12-21 · one way | American Airlines | AA5649 + AA345 | $343.00 | 2026-10-29T01:07:59Z |
| 2026-12-21 · one way | United Airlines | UA2823 + UA1222 | $343.00 | 2026-10-29T01:07:59Z |
| 2026-12-21 · one way | American Airlines | AA2774 + AA395 | $343.00 | 2026-10-29T01:07:59Z |
| 2026-12-21 · one way | American Airlines | AA552 + AA310 | $343.00 | 2026-10-29T01:07:59Z |
2026-12-21 · one way · $399.00
- United Airlines UA2052: IAD 2026-12-21 08:59:00 → SJO 2026-12-21 13:00:00; nonstop; 301 minutes. Local airport times.
2026-12-21 · one way · $217.00
- Frontier Airlines F94707 / F9215: IAD 2026-12-21 07:40:00 → SJO 2026-12-21 14:16:00; 1 stop(s) via ATL; 456 minutes. Local airport times.
- F94707: IAD 2026-12-21 07:40:00 → ATL 2026-12-21 09:54:00; layover at ATL: 80 minutes.
- F9215: ATL 2026-12-21 11:14:00 → SJO 2026-12-21 14:16:00.
2026-12-21 · one way · $273.00
- Avianca AV591 / AV609: IAD 2026-12-21 03:00:00 → SJO 2026-12-21 11:25:00; 1 stop(s) via SAL; 565 minutes. Local airport times.
- AV591: IAD 2026-12-21 03:00:00 → SAL 2026-12-21 06:30:00; layover at SAL: 220 minutes.
- AV609: SAL 2026-12-21 10:10:00 → SJO 2026-12-21 11:25:00.
2026-12-21 · one way · $343.00
- American Airlines AA5649 / AA345: IAD 2026-12-21 06:00:00 → SJO 2026-12-21 12:42:00; 1 stop(s) via CLT; 462 minutes. Local airport times.
- AA5649: IAD 2026-12-21 06:00:00 → CLT 2026-12-21 07:48:00; layover at CLT: 85 minutes.
- AA345: CLT 2026-12-21 09:13:00 → SJO 2026-12-21 12:42:00.
2026-12-21 · one way · $343.00
- United Airlines UA2823 / UA1222: IAD 2026-12-21 12:38:00 → SJO 2026-12-21 19:53:00; 1 stop(s) via EWR; 495 minutes. Local airport times.
- UA2823: IAD 2026-12-21 12:38:00 → EWR 2026-12-21 13:59:00; layover at EWR: 93 minutes.
- UA1222: EWR 2026-12-21 15:32:00 → SJO 2026-12-21 19:53:00.
2026-12-21 · one way · $343.00
- American Airlines AA2774 / AA395: IAD 2026-12-21 14:42:00 → SJO 2026-12-21 23:01:00; 1 stop(s) via DFW; 559 minutes. Local airport times.
- AA2774: IAD 2026-12-21 14:42:00 → DFW 2026-12-21 17:28:00; layover at DFW: 87 minutes.
- AA395: DFW 2026-12-21 18:55:00 → SJO 2026-12-21 23:01:00.
2026-12-21 · one way · $343.00
- American Airlines AA552 / AA310: IAD 2026-12-21 06:01:00 → SJO 2026-12-21 14:35:00; 1 stop(s) via MIA; 574 minutes. Local airport times.
- AA552: IAD 2026-12-21 06:01:00 → MIA 2026-12-21 08:50:00; layover at MIA: 218 minutes.
- AA310: MIA 2026-12-21 12:28:00 → SJO 2026-12-21 14:35:00.