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

Dulles → San Jose

Dec 24, 2026 · choose your return date

IAD → SJO1 adulteconomyOne way and round trips

30 flight options · 2 airlines

Choose your return date

One-way flights and round trips by duration. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

December 2026

Dec 24, 2026 · One wayFrontier AirlinesUp to 1 stop each way$217.00 Dec 24, 2026 · One wayAviancaUp to 1 stop each way$273.00 Dec 24, 2026 – Dec 25, 2026 · 1 nightFrontier AirlinesUp to 1 stop each way$427.00 Dec 24, 2026 – Dec 25, 2026 · 1 nightAviancaUp to 1 stop each way$532.00 Dec 24, 2026 – Dec 26, 2026 · 2 nightsFrontier AirlinesUp to 1 stop each way$427.00 Dec 24, 2026 – Dec 26, 2026 · 2 nightsAviancaUp to 1 stop each way$532.00 Dec 24, 2026 – Dec 27, 2026 · 3 nightsFrontier AirlinesUp to 1 stop each way$427.00 Dec 24, 2026 – Dec 27, 2026 · 3 nightsAviancaUp to 1 stop each way$532.00 Dec 24, 2026 – Dec 28, 2026 · 4 nightsFrontier AirlinesUp to 1 stop each way$427.00 Dec 24, 2026 – Dec 28, 2026 · 4 nightsAviancaUp to 1 stop each way$532.00 Dec 24, 2026 – Dec 29, 2026 · 5 nightsFrontier AirlinesUp to 1 stop each way$427.00 Dec 24, 2026 – Dec 29, 2026 · 5 nightsAviancaUp to 1 stop each way$532.00 Dec 24, 2026 – Dec 30, 2026 · 6 nightsFrontier AirlinesUp to 1 stop each way$427.00 Dec 24, 2026 – Dec 30, 2026 · 6 nightsAviancaUp to 1 stop each way$532.00 Dec 24, 2026 – Dec 31, 2026 · 7 nightsFrontier AirlinesUp to 1 stop each way$427.00 Dec 24, 2026 – Dec 31, 2026 · 7 nightsAviancaUp to 1 stop each way$532.00 Dec 24, 2026 – Jan 1, 2027 · 8 nightsFrontier AirlinesUp to 1 stop each way$427.00 Dec 24, 2026 – Jan 1, 2027 · 8 nightsAviancaUp to 1 stop each way$532.00 Dec 24, 2026 – Jan 2, 2027 · 9 nightsFrontier AirlinesUp to 1 stop each way$427.00 Dec 24, 2026 – Jan 2, 2027 · 9 nightsAviancaUp to 1 stop each way$532.00 Dec 24, 2026 – Jan 3, 2027 · 10 nightsFrontier AirlinesUp to 1 stop each way$427.00 Dec 24, 2026 – Jan 3, 2027 · 10 nightsAviancaUp to 1 stop each way$532.00 Dec 24, 2026 – Jan 4, 2027 · 11 nightsFrontier AirlinesUp to 1 stop each way$427.00 Dec 24, 2026 – Jan 4, 2027 · 11 nightsAviancaUp to 1 stop each way$532.00 Dec 24, 2026 – Jan 5, 2027 · 12 nightsFrontier AirlinesUp to 1 stop each way$366.00 Dec 24, 2026 – Jan 5, 2027 · 12 nightsAviancaUp to 1 stop each way$456.00 Dec 24, 2026 – Jan 6, 2027 · 13 nightsFrontier AirlinesUp to 1 stop each way$366.00 Dec 24, 2026 – Jan 6, 2027 · 13 nightsAviancaUp to 1 stop each way$456.00 Dec 24, 2026 – Jan 7, 2027 · 14 nightsFrontier AirlinesUp to 1 stop each way$366.00 Dec 24, 2026 – Jan 7, 2027 · 14 nightsAviancaUp to 1 stop each way$456.00

Flights for your trip

  1. Thu, Dec 24 · One way

    Frontier Airlines
    7:40 amIAD
    7h 36m
    ATL · 1h 20m
    2:16 pmSJO

    One-way total · 1 adult · Taxes included

  2. Thu, Dec 24 · One way

    Avianca
    3:00 amIAD
    9h 25m
    SAL · 3h 40m
    11:25 amSJO

    One-way total · 1 adult · Taxes included

  3. Thu, Dec 24 – Fri, Dec 25

    Frontier Airlines
    7:40 amIAD
    7h 36m
    ATL · 1h 20m
    2:16 pmSJO
    Frontier Airlines
    3:31 pmSJO
    8h 20m
    ATL · 2h 15m
    12:51 am+1IAD

    Round-trip total · 1 adult · Taxes included

  4. Thu, Dec 24 – Fri, Dec 25

    Avianca
    3:00 amIAD
    9h 25m
    SAL · 3h 40m
    11:25 amSJO
    Avianca
    7:00 amSJO
    8h 10m
    MIA · 2h 40m
    4:10 pmIAD

    Round-trip total · 1 adult · Taxes included

  5. Thu, Dec 24 – Sat, Dec 26

    Frontier Airlines
    7:40 amIAD
    7h 36m
    ATL · 1h 20m
    2:16 pmSJO
    Frontier Airlines
    3:31 pmSJO
    8h 20m
    ATL · 2h 15m
    12:51 am+1IAD

    Round-trip total · 1 adult · Taxes included

  6. Thu, Dec 24 – Sat, Dec 26

    Avianca
    3:00 amIAD
    9h 25m
    SAL · 3h 40m
    11:25 amSJO
    Avianca
    4:15 pmSJO
    7h 50m
    GUA · 2h 10m
    1:05 am+1IAD

    Round-trip total · 1 adult · Taxes included

  7. Thu, Dec 24 – Sun, Dec 27

    Frontier Airlines
    7:40 amIAD
    7h 36m
    ATL · 1h 20m
    2:16 pmSJO
    Frontier Airlines
    3:31 pmSJO
    8h 20m
    ATL · 2h 15m
    12:51 am+1IAD

    Round-trip total · 1 adult · Taxes included

  8. Thu, Dec 24 – Sun, Dec 27

    Avianca
    3:00 amIAD
    9h 25m
    SAL · 3h 40m
    11:25 amSJO
    Avianca
    7:00 amSJO
    8h 10m
    MIA · 2h 40m
    4:10 pmIAD

    Round-trip total · 1 adult · Taxes included

  9. Thu, Dec 24 – Mon, Dec 28

    Frontier Airlines
    7:40 amIAD
    7h 36m
    ATL · 1h 20m
    2:16 pmSJO
    Frontier Airlines
    3:31 pmSJO
    8h 20m
    ATL · 2h 15m
    12:51 am+1IAD

    Round-trip total · 1 adult · Taxes included

  10. Thu, Dec 24 – Mon, Dec 28

    Avianca
    3:00 amIAD
    9h 25m
    SAL · 3h 40m
    11:25 amSJO
    Avianca
    7:00 amSJO
    8h 10m
    MIA · 2h 40m
    4:10 pmIAD

    Round-trip total · 1 adult · Taxes included

  11. Thu, Dec 24 – Wed, Dec 30

    Frontier Airlines
    7:40 amIAD
    7h 36m
    ATL · 1h 20m
    2:16 pmSJO
    Frontier Airlines
    3:31 pmSJO
    8h 20m
    ATL · 2h 15m
    12:51 am+1IAD

    Round-trip total · 1 adult · Taxes included

  12. Thu, Dec 24 – Wed, Dec 30

    Avianca
    3:00 amIAD
    9h 25m
    SAL · 3h 40m
    11:25 amSJO
    Avianca
    7:00 amSJO
    8h 10m
    MIA · 2h 40m
    4:10 pmIAD

    Round-trip total · 1 adult · Taxes included

  13. Thu, Dec 24 – Thu, Dec 31

    Frontier Airlines
    7:40 amIAD
    7h 36m
    ATL · 1h 20m
    2:16 pmSJO
    Frontier Airlines
    3:31 pmSJO
    8h 20m
    ATL · 2h 15m
    12:51 am+1IAD

    Round-trip total · 1 adult · Taxes included

  14. Thu, Dec 24 – Thu, Dec 31

    Avianca
    3:00 amIAD
    9h 25m
    SAL · 3h 40m
    11:25 amSJO
    Avianca
    4:15 pmSJO
    7h 50m
    GUA · 2h 10m
    1:05 am+1IAD

    Round-trip total · 1 adult · Taxes included

  15. Thu, Dec 24 – Fri, Jan 1

    Frontier Airlines
    7:40 amIAD
    7h 36m
    ATL · 1h 20m
    2:16 pmSJO
    Frontier Airlines
    3:31 pmSJO
    8h 20m
    ATL · 2h 15m
    12:51 am+1IAD

    Round-trip total · 1 adult · Taxes included

  16. Thu, Dec 24 – Fri, Jan 1

    Avianca
    3:00 amIAD
    9h 25m
    SAL · 3h 40m
    11:25 amSJO
    Avianca
    7:00 amSJO
    8h 10m
    MIA · 2h 40m
    4:10 pmIAD

    Round-trip total · 1 adult · Taxes included

  17. Thu, Dec 24 – Sun, Jan 3

    Frontier Airlines
    7:40 amIAD
    7h 36m
    ATL · 1h 20m
    2:16 pmSJO
    Frontier Airlines
    3:31 pmSJO
    8h 20m
    ATL · 2h 15m
    12:51 am+1IAD

    Round-trip total · 1 adult · Taxes included

  18. Thu, Dec 24 – Sun, Jan 3

    Avianca
    3:00 amIAD
    9h 25m
    SAL · 3h 40m
    11:25 amSJO
    Avianca
    7:00 amSJO
    8h 10m
    MIA · 2h 40m
    4:10 pmIAD

    Round-trip total · 1 adult · Taxes included

  19. Thu, Dec 24 – Mon, Jan 4

    Frontier Airlines
    7:40 amIAD
    7h 36m
    ATL · 1h 20m
    2:16 pmSJO
    Frontier Airlines
    3:31 pmSJO
    8h 20m
    ATL · 2h 15m
    12:51 am+1IAD

    Round-trip total · 1 adult · Taxes included

  20. Thu, Dec 24 – Mon, Jan 4

    Avianca
    3:00 amIAD
    9h 25m
    SAL · 3h 40m
    11:25 amSJO
    Avianca
    7:00 amSJO
    8h 10m
    MIA · 2h 40m
    4:10 pmIAD

    Round-trip total · 1 adult · Taxes included

  21. Thu, Dec 24 – Tue, Jan 5

    Frontier Airlines
    7:40 amIAD
    7h 36m
    ATL · 1h 20m
    2:16 pmSJO
    Frontier Airlines
    3:31 pmSJO
    8h 20m
    ATL · 2h 15m
    12:51 am+1IAD

    Round-trip total · 1 adult · Taxes included

  22. Thu, Dec 24 – Tue, Jan 5

    Avianca
    3:00 amIAD
    9h 25m
    SAL · 3h 40m
    11:25 amSJO
    Avianca
    4:15 pmSJO
    7h 50m
    GUA · 2h 10m
    1:05 am+1IAD

    Round-trip total · 1 adult · Taxes included

  23. Thu, Dec 24 – Thu, Jan 7

    Frontier Airlines
    7:40 amIAD
    7h 36m
    ATL · 1h 20m
    2:16 pmSJO
    Frontier Airlines
    3:31 pmSJO
    8h 20m
    ATL · 2h 15m
    12:51 am+1IAD

    Round-trip total · 1 adult · Taxes included

  24. Thu, Dec 24 – Thu, Jan 7

    Avianca
    3:00 amIAD
    9h 25m
    SAL · 3h 40m
    11:25 amSJO
    Avianca
    4:15 pmSJO
    7h 50m
    GUA · 2h 10m
    1:05 am+1IAD

    Round-trip total · 1 adult · Taxes included

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1 of 24

Make this trip yours

IAD ⇄ SJO

Economy

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Explore this route

All dates for this routeDec 23, 2026 · Return optionsDec 25, 2026 · Return optionsHotels in Costa Rica with Axel
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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.

Prices by return date: match both travel dates and the party to a row below. Each total is for that exact trip, issued at the time shown. To book or select flights, follow that row's price link; it keeps the exact dates and travelers.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-24 · one wayFrontier AirlinesF94707 + F9215Axel-exclusive $217.002026-10-29T01:07:59Z
2026-12-24 · one wayAviancaAV591 + AV609Axel-exclusive $273.002026-10-29T01:07:59Z
2026-12-24 → 2026-12-25Frontier AirlinesF94707 + F9215 / F9214 + F94708Axel-exclusive $427.002026-10-29T01:07:59Z
2026-12-24 → 2026-12-25AviancaAV591 + AV609 / AV604 + UA2435Axel-exclusive $532.002026-10-29T01:07:59Z
2026-12-24 → 2026-12-26Frontier AirlinesF94707 + F9215 / F9214 + F94708Axel-exclusive $427.002026-10-29T01:07:59Z
2026-12-24 → 2026-12-26AviancaAV591 + AV609 / AV654 + AV644Axel-exclusive $532.002026-10-29T01:07:59Z
2026-12-24 → 2026-12-27Frontier AirlinesF94707 + F9215 / F9214 + F94708Axel-exclusive $427.002026-10-29T01:07:59Z
2026-12-24 → 2026-12-27AviancaAV591 + AV609 / AV604 + UA2435Axel-exclusive $532.002026-10-29T01:07:59Z
2026-12-24 → 2026-12-28Frontier AirlinesF94707 + F9215 / F9214 + F94708Axel-exclusive $427.002026-10-29T01:07:59Z
2026-12-24 → 2026-12-28AviancaAV591 + AV609 / AV604 + UA2435Axel-exclusive $532.002026-10-29T01:07:59Z
2026-12-24 → 2026-12-29Frontier AirlinesF94707 + F9215 / F9214 + F94708Axel-exclusive $427.002026-10-29T01:07:59Z
2026-12-24 → 2026-12-29AviancaAV591 + AV609 / AV654 + AV644Axel-exclusive $532.002026-10-29T01:07:59Z
2026-12-24 → 2026-12-30Frontier AirlinesF94707 + F9215 / F9214 + F94708Axel-exclusive $427.002026-10-29T01:07:59Z
2026-12-24 → 2026-12-30AviancaAV591 + AV609 / AV604 + UA2435Axel-exclusive $532.002026-10-29T01:07:59Z
2026-12-24 → 2026-12-31Frontier AirlinesF94707 + F9215 / F9214 + F94708Axel-exclusive $427.002026-10-29T01:07:59Z
2026-12-24 → 2026-12-31AviancaAV591 + AV609 / AV654 + AV644Axel-exclusive $532.002026-10-29T01:07:59Z
2026-12-24 → 2027-01-01Frontier AirlinesF94707 + F9215 / F9214 + F94708Axel-exclusive $427.002026-10-29T01:07:59Z
2026-12-24 → 2027-01-01AviancaAV591 + AV609 / AV604 + UA2435Axel-exclusive $532.002026-10-29T01:07:59Z
2026-12-24 → 2027-01-02Frontier AirlinesF94707 + F9215 / F9214 + F94708Axel-exclusive $427.002026-10-29T01:07:59Z
2026-12-24 → 2027-01-02AviancaAV591 + AV609 / AV654 + AV644Axel-exclusive $532.002026-10-29T01:07:59Z
2026-12-24 → 2027-01-03Frontier AirlinesF94707 + F9215 / F9214 + F94708Axel-exclusive $427.002026-10-29T01:07:59Z
2026-12-24 → 2027-01-03AviancaAV591 + AV609 / AV604 + UA2435Axel-exclusive $532.002026-10-29T01:07:59Z
2026-12-24 → 2027-01-04Frontier AirlinesF94707 + F9215 / F9214 + F94708Axel-exclusive $427.002026-10-29T01:07:59Z
2026-12-24 → 2027-01-04AviancaAV591 + AV609 / AV604 + UA2435Axel-exclusive $532.002026-10-29T01:07:59Z
2026-12-24 → 2027-01-05Frontier AirlinesF94707 + F9215 / F9214 + F94708Axel-exclusive $366.002026-10-29T01:07:59Z
2026-12-24 → 2027-01-05AviancaAV591 + AV609 / AV654 + AV644Axel-exclusive $456.002026-10-29T01:07:59Z
2026-12-24 → 2027-01-06Frontier AirlinesF94707 + F9215 / F9214 + F94708Axel-exclusive $366.002026-10-29T01:07:59Z
2026-12-24 → 2027-01-06AviancaAV591 + AV609 / AV604 + UA2435Axel-exclusive $456.002026-10-29T01:07:59Z
2026-12-24 → 2027-01-07Frontier AirlinesF94707 + F9215 / F9214 + F94708Axel-exclusive $366.002026-10-29T01:07:59Z
2026-12-24 → 2027-01-07AviancaAV591 + AV609 / AV654 + AV644Axel-exclusive $456.002026-10-29T01:07:59Z

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

2026-12-24 · one way · Axel-exclusive $217.00

  • Frontier Airlines F94707 / F9215: IAD 2026-12-24 07:40:00 → SJO 2026-12-24 14:16:00; 1 stop(s) via ATL; 456 minutes. Local airport times.
    • F94707: IAD 2026-12-24 07:40:00 → ATL 2026-12-24 09:54:00; layover at ATL: 80 minutes.
    • F9215: ATL 2026-12-24 11:14:00 → SJO 2026-12-24 14:16:00.

2026-12-24 · one way · Axel-exclusive $273.00

  • Avianca AV591 / AV609: IAD 2026-12-24 03:00:00 → SJO 2026-12-24 11:25:00; 1 stop(s) via SAL; 565 minutes. Local airport times.
    • AV591: IAD 2026-12-24 03:00:00 → SAL 2026-12-24 06:30:00; layover at SAL: 220 minutes.
    • AV609: SAL 2026-12-24 10:10:00 → SJO 2026-12-24 11:25:00.

2026-12-24 → 2026-12-25 · Axel-exclusive $427.00

  • Frontier Airlines F94707 / F9215: IAD 2026-12-24 07:40:00 → SJO 2026-12-24 14:16:00; 1 stop(s) via ATL; 456 minutes. Local airport times.
    • F94707: IAD 2026-12-24 07:40:00 → ATL 2026-12-24 09:54:00; layover at ATL: 80 minutes.
    • F9215: ATL 2026-12-24 11:14:00 → SJO 2026-12-24 14:16:00.
  • Frontier Airlines F9214 / F94708: SJO 2026-12-25 15:31:00 → IAD 2026-12-26 00:51:00; 1 stop(s) via ATL; 500 minutes. Local airport times.
    • F9214: SJO 2026-12-25 15:31:00 → ATL 2026-12-25 20:44:00; layover at ATL: 135 minutes.
    • F94708: ATL 2026-12-25 22:59:00 → IAD 2026-12-26 00:51:00.

2026-12-24 → 2026-12-25 · Axel-exclusive $532.00

  • Avianca AV591 / AV609: IAD 2026-12-24 03:00:00 → SJO 2026-12-24 11:25:00; 1 stop(s) via SAL; 565 minutes. Local airport times.
    • AV591: IAD 2026-12-24 03:00:00 → SAL 2026-12-24 06:30:00; layover at SAL: 220 minutes.
    • AV609: SAL 2026-12-24 10:10:00 → SJO 2026-12-24 11:25:00.
  • Avianca AV604 / UA2435: SJO 2026-12-25 07:00:00 → IAD 2026-12-25 16:10:00; 1 stop(s) via MIA; 490 minutes. Local airport times.
    • AV604: SJO 2026-12-25 07:00:00 → MIA 2026-12-25 10:50:00; layover at MIA: 160 minutes.
    • UA2435: MIA 2026-12-25 13:30:00 → IAD 2026-12-25 16:10:00.

2026-12-24 → 2026-12-26 · Axel-exclusive $427.00

  • Frontier Airlines F94707 / F9215: IAD 2026-12-24 07:40:00 → SJO 2026-12-24 14:16:00; 1 stop(s) via ATL; 456 minutes. Local airport times.
    • F94707: IAD 2026-12-24 07:40:00 → ATL 2026-12-24 09:54:00; layover at ATL: 80 minutes.
    • F9215: ATL 2026-12-24 11:14:00 → SJO 2026-12-24 14:16:00.
  • Frontier Airlines F9214 / F94708: SJO 2026-12-26 15:31:00 → IAD 2026-12-27 00:51:00; 1 stop(s) via ATL; 500 minutes. Local airport times.
    • F9214: SJO 2026-12-26 15:31:00 → ATL 2026-12-26 20:44:00; layover at ATL: 135 minutes.
    • F94708: ATL 2026-12-26 22:59:00 → IAD 2026-12-27 00:51:00.

2026-12-24 → 2026-12-26 · Axel-exclusive $532.00

  • Avianca AV591 / AV609: IAD 2026-12-24 03:00:00 → SJO 2026-12-24 11:25:00; 1 stop(s) via SAL; 565 minutes. Local airport times.
    • AV591: IAD 2026-12-24 03:00:00 → SAL 2026-12-24 06:30:00; layover at SAL: 220 minutes.
    • AV609: SAL 2026-12-24 10:10:00 → SJO 2026-12-24 11:25:00.
  • Avianca AV654 / AV644: SJO 2026-12-26 16:15:00 → IAD 2026-12-27 01:05:00; 1 stop(s) via GUA; 470 minutes. Local airport times.
    • AV654: SJO 2026-12-26 16:15:00 → GUA 2026-12-26 17:50:00; layover at GUA: 130 minutes.
    • AV644: GUA 2026-12-26 20:00:00 → IAD 2026-12-27 01:05:00.

2026-12-24 → 2026-12-27 · Axel-exclusive $427.00

  • Frontier Airlines F94707 / F9215: IAD 2026-12-24 07:40:00 → SJO 2026-12-24 14:16:00; 1 stop(s) via ATL; 456 minutes. Local airport times.
    • F94707: IAD 2026-12-24 07:40:00 → ATL 2026-12-24 09:54:00; layover at ATL: 80 minutes.
    • F9215: ATL 2026-12-24 11:14:00 → SJO 2026-12-24 14:16:00.
  • Frontier Airlines F9214 / F94708: SJO 2026-12-27 15:31:00 → IAD 2026-12-28 00:51:00; 1 stop(s) via ATL; 500 minutes. Local airport times.
    • F9214: SJO 2026-12-27 15:31:00 → ATL 2026-12-27 20:44:00; layover at ATL: 135 minutes.
    • F94708: ATL 2026-12-27 22:59:00 → IAD 2026-12-28 00:51:00.

2026-12-24 → 2026-12-27 · Axel-exclusive $532.00

  • Avianca AV591 / AV609: IAD 2026-12-24 03:00:00 → SJO 2026-12-24 11:25:00; 1 stop(s) via SAL; 565 minutes. Local airport times.
    • AV591: IAD 2026-12-24 03:00:00 → SAL 2026-12-24 06:30:00; layover at SAL: 220 minutes.
    • AV609: SAL 2026-12-24 10:10:00 → SJO 2026-12-24 11:25:00.
  • Avianca AV604 / UA2435: SJO 2026-12-27 07:00:00 → IAD 2026-12-27 16:10:00; 1 stop(s) via MIA; 490 minutes. Local airport times.
    • AV604: SJO 2026-12-27 07:00:00 → MIA 2026-12-27 10:50:00; layover at MIA: 160 minutes.
    • UA2435: MIA 2026-12-27 13:30:00 → IAD 2026-12-27 16:10:00.

2026-12-24 → 2026-12-28 · Axel-exclusive $427.00

  • Frontier Airlines F94707 / F9215: IAD 2026-12-24 07:40:00 → SJO 2026-12-24 14:16:00; 1 stop(s) via ATL; 456 minutes. Local airport times.
    • F94707: IAD 2026-12-24 07:40:00 → ATL 2026-12-24 09:54:00; layover at ATL: 80 minutes.
    • F9215: ATL 2026-12-24 11:14:00 → SJO 2026-12-24 14:16:00.
  • Frontier Airlines F9214 / F94708: SJO 2026-12-28 15:31:00 → IAD 2026-12-29 00:51:00; 1 stop(s) via ATL; 500 minutes. Local airport times.
    • F9214: SJO 2026-12-28 15:31:00 → ATL 2026-12-28 20:44:00; layover at ATL: 135 minutes.
    • F94708: ATL 2026-12-28 22:59:00 → IAD 2026-12-29 00:51:00.

2026-12-24 → 2026-12-28 · Axel-exclusive $532.00

  • Avianca AV591 / AV609: IAD 2026-12-24 03:00:00 → SJO 2026-12-24 11:25:00; 1 stop(s) via SAL; 565 minutes. Local airport times.
    • AV591: IAD 2026-12-24 03:00:00 → SAL 2026-12-24 06:30:00; layover at SAL: 220 minutes.
    • AV609: SAL 2026-12-24 10:10:00 → SJO 2026-12-24 11:25:00.
  • Avianca AV604 / UA2435: SJO 2026-12-28 07:00:00 → IAD 2026-12-28 16:10:00; 1 stop(s) via MIA; 490 minutes. Local airport times.
    • AV604: SJO 2026-12-28 07:00:00 → MIA 2026-12-28 10:50:00; layover at MIA: 160 minutes.
    • UA2435: MIA 2026-12-28 13:30:00 → IAD 2026-12-28 16:10:00.

2026-12-24 → 2026-12-30 · Axel-exclusive $427.00

  • Frontier Airlines F94707 / F9215: IAD 2026-12-24 07:40:00 → SJO 2026-12-24 14:16:00; 1 stop(s) via ATL; 456 minutes. Local airport times.
    • F94707: IAD 2026-12-24 07:40:00 → ATL 2026-12-24 09:54:00; layover at ATL: 80 minutes.
    • F9215: ATL 2026-12-24 11:14:00 → SJO 2026-12-24 14:16:00.
  • Frontier Airlines F9214 / F94708: SJO 2026-12-30 15:31:00 → IAD 2026-12-31 00:51:00; 1 stop(s) via ATL; 500 minutes. Local airport times.
    • F9214: SJO 2026-12-30 15:31:00 → ATL 2026-12-30 20:44:00; layover at ATL: 135 minutes.
    • F94708: ATL 2026-12-30 22:59:00 → IAD 2026-12-31 00:51:00.

2026-12-24 → 2026-12-30 · Axel-exclusive $532.00

  • Avianca AV591 / AV609: IAD 2026-12-24 03:00:00 → SJO 2026-12-24 11:25:00; 1 stop(s) via SAL; 565 minutes. Local airport times.
    • AV591: IAD 2026-12-24 03:00:00 → SAL 2026-12-24 06:30:00; layover at SAL: 220 minutes.
    • AV609: SAL 2026-12-24 10:10:00 → SJO 2026-12-24 11:25:00.
  • Avianca AV604 / UA2435: SJO 2026-12-30 07:00:00 → IAD 2026-12-30 16:10:00; 1 stop(s) via MIA; 490 minutes. Local airport times.
    • AV604: SJO 2026-12-30 07:00:00 → MIA 2026-12-30 10:50:00; layover at MIA: 160 minutes.
    • UA2435: MIA 2026-12-30 13:30:00 → IAD 2026-12-30 16:10:00.

2026-12-24 → 2026-12-31 · Axel-exclusive $427.00

  • Frontier Airlines F94707 / F9215: IAD 2026-12-24 07:40:00 → SJO 2026-12-24 14:16:00; 1 stop(s) via ATL; 456 minutes. Local airport times.
    • F94707: IAD 2026-12-24 07:40:00 → ATL 2026-12-24 09:54:00; layover at ATL: 80 minutes.
    • F9215: ATL 2026-12-24 11:14:00 → SJO 2026-12-24 14:16:00.
  • Frontier Airlines F9214 / F94708: SJO 2026-12-31 15:31:00 → IAD 2027-01-01 00:51:00; 1 stop(s) via ATL; 500 minutes. Local airport times.
    • F9214: SJO 2026-12-31 15:31:00 → ATL 2026-12-31 20:44:00; layover at ATL: 135 minutes.
    • F94708: ATL 2026-12-31 22:59:00 → IAD 2027-01-01 00:51:00.

2026-12-24 → 2026-12-31 · Axel-exclusive $532.00

  • Avianca AV591 / AV609: IAD 2026-12-24 03:00:00 → SJO 2026-12-24 11:25:00; 1 stop(s) via SAL; 565 minutes. Local airport times.
    • AV591: IAD 2026-12-24 03:00:00 → SAL 2026-12-24 06:30:00; layover at SAL: 220 minutes.
    • AV609: SAL 2026-12-24 10:10:00 → SJO 2026-12-24 11:25:00.
  • Avianca AV654 / AV644: SJO 2026-12-31 16:15:00 → IAD 2027-01-01 01:05:00; 1 stop(s) via GUA; 470 minutes. Local airport times.
    • AV654: SJO 2026-12-31 16:15:00 → GUA 2026-12-31 17:50:00; layover at GUA: 130 minutes.
    • AV644: GUA 2026-12-31 20:00:00 → IAD 2027-01-01 01:05:00.

2026-12-24 → 2027-01-01 · Axel-exclusive $427.00

  • Frontier Airlines F94707 / F9215: IAD 2026-12-24 07:40:00 → SJO 2026-12-24 14:16:00; 1 stop(s) via ATL; 456 minutes. Local airport times.
    • F94707: IAD 2026-12-24 07:40:00 → ATL 2026-12-24 09:54:00; layover at ATL: 80 minutes.
    • F9215: ATL 2026-12-24 11:14:00 → SJO 2026-12-24 14:16:00.
  • Frontier Airlines F9214 / F94708: SJO 2027-01-01 15:31:00 → IAD 2027-01-02 00:51:00; 1 stop(s) via ATL; 500 minutes. Local airport times.
    • F9214: SJO 2027-01-01 15:31:00 → ATL 2027-01-01 20:44:00; layover at ATL: 135 minutes.
    • F94708: ATL 2027-01-01 22:59:00 → IAD 2027-01-02 00:51:00.

2026-12-24 → 2027-01-01 · Axel-exclusive $532.00

  • Avianca AV591 / AV609: IAD 2026-12-24 03:00:00 → SJO 2026-12-24 11:25:00; 1 stop(s) via SAL; 565 minutes. Local airport times.
    • AV591: IAD 2026-12-24 03:00:00 → SAL 2026-12-24 06:30:00; layover at SAL: 220 minutes.
    • AV609: SAL 2026-12-24 10:10:00 → SJO 2026-12-24 11:25:00.
  • Avianca AV604 / UA2435: SJO 2027-01-01 07:00:00 → IAD 2027-01-01 16:10:00; 1 stop(s) via MIA; 490 minutes. Local airport times.
    • AV604: SJO 2027-01-01 07:00:00 → MIA 2027-01-01 10:50:00; layover at MIA: 160 minutes.
    • UA2435: MIA 2027-01-01 13:30:00 → IAD 2027-01-01 16:10:00.

2026-12-24 → 2027-01-03 · Axel-exclusive $427.00

  • Frontier Airlines F94707 / F9215: IAD 2026-12-24 07:40:00 → SJO 2026-12-24 14:16:00; 1 stop(s) via ATL; 456 minutes. Local airport times.
    • F94707: IAD 2026-12-24 07:40:00 → ATL 2026-12-24 09:54:00; layover at ATL: 80 minutes.
    • F9215: ATL 2026-12-24 11:14:00 → SJO 2026-12-24 14:16:00.
  • Frontier Airlines F9214 / F94708: SJO 2027-01-03 15:31:00 → IAD 2027-01-04 00:51:00; 1 stop(s) via ATL; 500 minutes. Local airport times.
    • F9214: SJO 2027-01-03 15:31:00 → ATL 2027-01-03 20:44:00; layover at ATL: 135 minutes.
    • F94708: ATL 2027-01-03 22:59:00 → IAD 2027-01-04 00:51:00.

2026-12-24 → 2027-01-03 · Axel-exclusive $532.00

  • Avianca AV591 / AV609: IAD 2026-12-24 03:00:00 → SJO 2026-12-24 11:25:00; 1 stop(s) via SAL; 565 minutes. Local airport times.
    • AV591: IAD 2026-12-24 03:00:00 → SAL 2026-12-24 06:30:00; layover at SAL: 220 minutes.
    • AV609: SAL 2026-12-24 10:10:00 → SJO 2026-12-24 11:25:00.
  • Avianca AV604 / UA2435: SJO 2027-01-03 07:00:00 → IAD 2027-01-03 16:10:00; 1 stop(s) via MIA; 490 minutes. Local airport times.
    • AV604: SJO 2027-01-03 07:00:00 → MIA 2027-01-03 10:50:00; layover at MIA: 160 minutes.
    • UA2435: MIA 2027-01-03 13:30:00 → IAD 2027-01-03 16:10:00.

2026-12-24 → 2027-01-04 · Axel-exclusive $427.00

  • Frontier Airlines F94707 / F9215: IAD 2026-12-24 07:40:00 → SJO 2026-12-24 14:16:00; 1 stop(s) via ATL; 456 minutes. Local airport times.
    • F94707: IAD 2026-12-24 07:40:00 → ATL 2026-12-24 09:54:00; layover at ATL: 80 minutes.
    • F9215: ATL 2026-12-24 11:14:00 → SJO 2026-12-24 14:16:00.
  • Frontier Airlines F9214 / F94708: SJO 2027-01-04 15:31:00 → IAD 2027-01-05 00:51:00; 1 stop(s) via ATL; 500 minutes. Local airport times.
    • F9214: SJO 2027-01-04 15:31:00 → ATL 2027-01-04 20:44:00; layover at ATL: 135 minutes.
    • F94708: ATL 2027-01-04 22:59:00 → IAD 2027-01-05 00:51:00.

2026-12-24 → 2027-01-04 · Axel-exclusive $532.00

  • Avianca AV591 / AV609: IAD 2026-12-24 03:00:00 → SJO 2026-12-24 11:25:00; 1 stop(s) via SAL; 565 minutes. Local airport times.
    • AV591: IAD 2026-12-24 03:00:00 → SAL 2026-12-24 06:30:00; layover at SAL: 220 minutes.
    • AV609: SAL 2026-12-24 10:10:00 → SJO 2026-12-24 11:25:00.
  • Avianca AV604 / UA2435: SJO 2027-01-04 07:00:00 → IAD 2027-01-04 16:10:00; 1 stop(s) via MIA; 490 minutes. Local airport times.
    • AV604: SJO 2027-01-04 07:00:00 → MIA 2027-01-04 10:50:00; layover at MIA: 160 minutes.
    • UA2435: MIA 2027-01-04 13:30:00 → IAD 2027-01-04 16:10:00.

2026-12-24 → 2027-01-05 · Axel-exclusive $366.00

  • Frontier Airlines F94707 / F9215: IAD 2026-12-24 07:40:00 → SJO 2026-12-24 14:16:00; 1 stop(s) via ATL; 456 minutes. Local airport times.
    • F94707: IAD 2026-12-24 07:40:00 → ATL 2026-12-24 09:54:00; layover at ATL: 80 minutes.
    • F9215: ATL 2026-12-24 11:14:00 → SJO 2026-12-24 14:16:00.
  • Frontier Airlines F9214 / F94708: SJO 2027-01-05 15:31:00 → IAD 2027-01-06 00:51:00; 1 stop(s) via ATL; 500 minutes. Local airport times.
    • F9214: SJO 2027-01-05 15:31:00 → ATL 2027-01-05 20:44:00; layover at ATL: 135 minutes.
    • F94708: ATL 2027-01-05 22:59:00 → IAD 2027-01-06 00:51:00.

2026-12-24 → 2027-01-05 · Axel-exclusive $456.00

  • Avianca AV591 / AV609: IAD 2026-12-24 03:00:00 → SJO 2026-12-24 11:25:00; 1 stop(s) via SAL; 565 minutes. Local airport times.
    • AV591: IAD 2026-12-24 03:00:00 → SAL 2026-12-24 06:30:00; layover at SAL: 220 minutes.
    • AV609: SAL 2026-12-24 10:10:00 → SJO 2026-12-24 11:25:00.
  • Avianca AV654 / AV644: SJO 2027-01-05 16:15:00 → IAD 2027-01-06 01:05:00; 1 stop(s) via GUA; 470 minutes. Local airport times.
    • AV654: SJO 2027-01-05 16:15:00 → GUA 2027-01-05 17:50:00; layover at GUA: 130 minutes.
    • AV644: GUA 2027-01-05 20:00:00 → IAD 2027-01-06 01:05:00.

2026-12-24 → 2027-01-07 · Axel-exclusive $366.00

  • Frontier Airlines F94707 / F9215: IAD 2026-12-24 07:40:00 → SJO 2026-12-24 14:16:00; 1 stop(s) via ATL; 456 minutes. Local airport times.
    • F94707: IAD 2026-12-24 07:40:00 → ATL 2026-12-24 09:54:00; layover at ATL: 80 minutes.
    • F9215: ATL 2026-12-24 11:14:00 → SJO 2026-12-24 14:16:00.
  • Frontier Airlines F9214 / F94708: SJO 2027-01-07 15:31:00 → IAD 2027-01-08 00:51:00; 1 stop(s) via ATL; 500 minutes. Local airport times.
    • F9214: SJO 2027-01-07 15:31:00 → ATL 2027-01-07 20:44:00; layover at ATL: 135 minutes.
    • F94708: ATL 2027-01-07 22:59:00 → IAD 2027-01-08 00:51:00.

2026-12-24 → 2027-01-07 · Axel-exclusive $456.00

  • Avianca AV591 / AV609: IAD 2026-12-24 03:00:00 → SJO 2026-12-24 11:25:00; 1 stop(s) via SAL; 565 minutes. Local airport times.
    • AV591: IAD 2026-12-24 03:00:00 → SAL 2026-12-24 06:30:00; layover at SAL: 220 minutes.
    • AV609: SAL 2026-12-24 10:10:00 → SJO 2026-12-24 11:25:00.
  • Avianca AV654 / AV644: SJO 2027-01-07 16:15:00 → IAD 2027-01-08 01:05:00; 1 stop(s) via GUA; 470 minutes. Local airport times.
    • AV654: SJO 2027-01-07 16:15:00 → GUA 2027-01-07 17:50:00; layover at GUA: 130 minutes.
    • AV644: GUA 2027-01-07 20:00:00 → IAD 2027-01-08 01:05:00.

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For AI assistants

  • This page: Dulles (IAD) to San Jose (SJO) · Dec 24, 2026 · choose your return date: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
  • Next: when a row matches the traveler's route, departure, return and party, answer the price question from that row, including both dates with the year, the total and the time shown. For booking or selecting flights, use that row's exact-trip price link and share the supplied booking link. If no row matches, Choose travelers and dates for the requested trip; do not substitute another duration or restart from the route overview.
  • 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. Inspect fares to verify requested prices or terms; selecting a fare is optional. Use that fare’s booking link to preserve its Membership price basis. State anything unverified. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and explain what remains unresolved. Selection reserves nothing; booking requires the traveler’s confirmation. 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.