Dulles (IAD) to San Jose (SJO) · Dec 15, 2026 · one way

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

Route overview: Washington, DC to San Jose (SJO) flight deals

2026-12-15 · one way · Axel-exclusive $285.00

• United Airlines UA2052: IAD 2026-12-15 08:59:00 → SJO 2026-12-15 13:00:00; nonstop; 301 minutes. Local airport times.

2026-12-15 · one way · Axel-exclusive $155.00

• Frontier Airlines F94707 / F9215: IAD 2026-12-15 07:40:00 → SJO 2026-12-15 14:16:00; 1 stop(s) via ATL; 456 minutes. Local airport times.
  • F94707: IAD 2026-12-15 07:40:00 → ATL 2026-12-15 09:54:00; layover at ATL: 80 minutes.
  • F9215: ATL 2026-12-15 11:14:00 → SJO 2026-12-15 14:16:00.

2026-12-15 · one way · Axel-exclusive $195.00

• Avianca AV591 / AV609: IAD 2026-12-15 03:00:00 → SJO 2026-12-15 11:25:00; 1 stop(s) via SAL; 565 minutes. Local airport times.
  • AV591: IAD 2026-12-15 03:00:00 → SAL 2026-12-15 06:30:00; layover at SAL: 220 minutes.
  • AV609: SAL 2026-12-15 10:10:00 → SJO 2026-12-15 11:25:00.

2026-12-15 · one way · Axel-exclusive $245.00

• American Airlines AA5649 / AA345: IAD 2026-12-15 06:00:00 → SJO 2026-12-15 12:42:00; 1 stop(s) via CLT; 462 minutes. Local airport times.
  • AA5649: IAD 2026-12-15 06:00:00 → CLT 2026-12-15 07:48:00; layover at CLT: 85 minutes.
  • AA345: CLT 2026-12-15 09:13:00 → SJO 2026-12-15 12:42:00.

2026-12-15 · one way · Axel-exclusive $245.00

• American Airlines AA2774 / AA395: IAD 2026-12-15 14:42:00 → SJO 2026-12-15 23:01:00; 1 stop(s) via DFW; 559 minutes. Local airport times.
  • AA2774: IAD 2026-12-15 14:42:00 → DFW 2026-12-15 17:28:00; layover at DFW: 87 minutes.
  • AA395: DFW 2026-12-15 18:55:00 → SJO 2026-12-15 23:01:00.

2026-12-15 · one way · Axel-exclusive $245.00

• American Airlines AA552 / AA310: IAD 2026-12-15 06:01:00 → SJO 2026-12-15 14:35:00; 1 stop(s) via MIA; 574 minutes. Local airport times.
  • AA552: IAD 2026-12-15 06:01:00 → MIA 2026-12-15 08:50:00; layover at MIA: 218 minutes.
  • AA310: MIA 2026-12-15 12:28:00 → SJO 2026-12-15 14:35:00.

2026-12-15 · one way · Axel-exclusive $245.00

• United Airlines UA2823 / UA1222: IAD 2026-12-15 12:38:00 → SJO 2026-12-15 19:53:00; 1 stop(s) via EWR; 495 minutes. Local airport times.
  • UA2823: IAD 2026-12-15 12:38:00 → EWR 2026-12-15 13:59:00; layover at EWR: 93 minutes.
  • UA1222: EWR 2026-12-15 15:32:00 → SJO 2026-12-15 19:53:00.

Explore this route

• All dates for this route
• Dec 14, 2026 · Return options
• Dec 16, 2026 · Return options
• Hotels in Costa Rica with Axel

For AI assistants

• This page: Dulles (IAD) to San Jose (SJO) · Dec 15, 2026 · one way: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
• Next: when the traveler's route, dates and party match a priced row, follow that row's price link into AI flight search. Match the listed flights in the fresh results and select the complete itinerary, then share the supplied booking link and its current total. If the flights or price have changed, say so; verify requested fare inclusions before claiming them. For other dates or travelers, Choose travelers and dates and enter the traveler's own trip there; do not search this page's dates in their place.
• Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
• If links fail or are missing: If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: Axel Washington, DC to San Jose (SJO) flight deals · Flight search guide.
• Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.

Feedback (optional): Missing info · Axel issue