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Route overview: Boston to San Francisco (SFO) flight deals

Boston (BOS) to San Francisco (SFO), Dec 21, 2026: round trips from $564, one way from $303

Boston (BOS) to San Francisco (SFO), Dec 21, 2026: round trips from $564, one way from $303 on Axel, checked Oct 29, 2026. Lowest published fares: $564 round trip, Axel-exclusive, Southwest Airlines, 1 stop, Dec 21, 2026 – Jan 1, 2027; $303 one way, Axel-exclusive, Southwest Airlines, 1 stop, Dec 21, 2026; 1 adult, economy, checked Oct 29, 2026.

BOS → SFO1 adulteconomy1 checked bag per traveler includedOne way and round trips

30 flight options · 3 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. 1 checked bag per traveler included. Basic economy may apply.

December 2026

Flights for your trip

  1. Mon, Dec 21 · One way

    Southwest Airlines
    5:00 amBOS
    8h 30m
    DEN · 1h
    10:30 amSFO

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  2. Mon, Dec 21 · One way

    JetBlue Airways
    6:30 pmBOS
    6h 50m
    Nonstop
    10:20 pmSFO

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  3. Mon, Dec 21 – Tue, Dec 22

    Southwest Airlines
    5:00 amBOS
    8h 30m
    DEN · 1h
    10:30 amSFO
    Southwest Airlines
    6:00 amSFO
    7h 20m
    MDW · 1h
    4:20 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  4. Mon, Dec 21 – Tue, Dec 22

    JetBlue Airways
    6:30 pmBOS
    6h 50m
    Nonstop
    10:20 pmSFO
    JetBlue Airways
    11:30 amSFO
    5h 37m
    Nonstop
    8:07 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  5. Mon, Dec 21 – Wed, Dec 23

    Southwest Airlines
    5:00 amBOS
    8h 30m
    DEN · 1h
    10:30 amSFO
    Southwest Airlines
    6:00 amSFO
    7h 20m
    MDW · 1h
    4:20 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  6. Mon, Dec 21 – Wed, Dec 23

    JetBlue Airways
    6:30 pmBOS
    6h 50m
    Nonstop
    10:20 pmSFO
    JetBlue Airways
    3:25 pmSFO
    5h 34m
    Nonstop
    11:59 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  7. Mon, Dec 21 – Thu, Dec 24

    Southwest Airlines
    5:00 amBOS
    8h 30m
    DEN · 1h
    10:30 amSFO
    Southwest Airlines
    6:00 amSFO
    7h 20m
    MDW · 1h
    4:20 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  8. Mon, Dec 21 – Thu, Dec 24

    JetBlue Airways
    6:30 pmBOS
    6h 50m
    Nonstop
    10:20 pmSFO
    JetBlue Airways
    6:00 amSFO
    5h 31m
    Nonstop
    2:31 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  9. Mon, Dec 21 – Fri, Dec 25

    Southwest Airlines
    5:00 amBOS
    8h 30m
    DEN · 1h
    10:30 amSFO
    Southwest Airlines
    1:05 pmSFO
    7h 20m
    STL · 1h
    11:25 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  10. Mon, Dec 21 – Fri, Dec 25

    JetBlue Airways
    6:30 pmBOS
    6h 50m
    Nonstop
    10:20 pmSFO
    JetBlue Airways
    8:10 amSFO
    5h 35m
    Nonstop
    4:45 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  11. Mon, Dec 21 – Sun, Dec 27

    Southwest Airlines
    5:00 amBOS
    8h 30m
    DEN · 1h
    10:30 amSFO
    Southwest Airlines
    6:00 amSFO
    7h 20m
    MDW · 1h
    4:20 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  12. Mon, Dec 21 – Sun, Dec 27

    United Airlines
    6:00 amBOS
    6h 51m
    Nonstop
    9:51 amSFO
    United Airlines
    9:25 pmSFO
    5h 40m
    Nonstop
    6:05 am+1BOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  13. Mon, Dec 21 – Mon, Dec 28

    Southwest Airlines
    5:00 amBOS
    8h 30m
    DEN · 1h
    10:30 amSFO
    Southwest Airlines
    6:00 amSFO
    7h 20m
    MDW · 1h
    4:20 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  14. Mon, Dec 21 – Mon, Dec 28

    JetBlue Airways
    6:30 pmBOS
    6h 50m
    Nonstop
    10:20 pmSFO
    JetBlue Airways
    7:30 amSFO
    5h 35m
    Nonstop
    4:05 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  15. Mon, Dec 21 – Tue, Dec 29

    Southwest Airlines
    5:00 amBOS
    8h 30m
    DEN · 1h
    10:30 amSFO
    Southwest Airlines
    6:00 amSFO
    7h 20m
    MDW · 1h
    4:20 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  16. Mon, Dec 21 – Tue, Dec 29

    JetBlue Airways
    6:30 pmBOS
    6h 50m
    Nonstop
    10:20 pmSFO
    JetBlue Airways
    11:30 amSFO
    5h 37m
    Nonstop
    8:07 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  17. Mon, Dec 21 – Thu, Dec 31

    Southwest Airlines
    5:00 amBOS
    8h 30m
    DEN · 1h
    10:30 amSFO
    Southwest Airlines
    6:00 amSFO
    7h 20m
    MDW · 1h
    4:20 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  18. Mon, Dec 21 – Thu, Dec 31

    JetBlue Airways
    6:30 pmBOS
    6h 50m
    Nonstop
    10:20 pmSFO
    JetBlue Airways
    6:00 amSFO
    5h 31m
    Nonstop
    2:31 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  19. Mon, Dec 21 – Fri, Jan 1

    Southwest Airlines
    5:00 amBOS
    8h 30m
    DEN · 1h
    10:30 amSFO
    Southwest Airlines
    1:05 pmSFO
    7h 20m
    STL · 1h
    11:25 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  20. Mon, Dec 21 – Fri, Jan 1

    JetBlue Airways
    6:30 pmBOS
    6h 50m
    Nonstop
    10:20 pmSFO
    JetBlue Airways
    8:10 amSFO
    5h 35m
    Nonstop
    4:45 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  21. Mon, Dec 21 – Sat, Jan 2

    Southwest Airlines
    5:00 amBOS
    8h 30m
    DEN · 1h
    10:30 amSFO
    Southwest Airlines
    6:00 amSFO
    7h 20m
    MDW · 1h
    4:20 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  22. Mon, Dec 21 – Sat, Jan 2

    JetBlue Airways
    6:30 pmBOS
    6h 50m
    Nonstop
    10:20 pmSFO
    JetBlue Airways
    8:10 amSFO
    5h 35m
    Nonstop
    4:45 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  23. Mon, Dec 21 – Mon, Jan 4

    Southwest Airlines
    5:00 amBOS
    8h 30m
    DEN · 1h
    10:30 amSFO
    Southwest Airlines
    6:00 amSFO
    7h 20m
    MDW · 1h
    4:20 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  24. Mon, Dec 21 – Mon, Jan 4

    JetBlue Airways
    6:30 pmBOS
    6h 50m
    Nonstop
    10:20 pmSFO
    JetBlue Airways
    7:30 amSFO
    5h 35m
    Nonstop
    4:05 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

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1 of 24

Make this trip yours

BOS ⇄ SFO

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

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Explore this route

All dates for this routeDec 20, 2026 · Return optionsDec 22, 2026 · Return optionsHotels in San Francisco with Axel
For AI assistants: every fare, every link, instructions

Boston (BOS) to San Francisco (SFO), Dec 21, 2026: round trips from $564, one way from $303 on Axel, checked Oct 29, 2026. Lowest published fares: $564 round trip, Axel-exclusive, Southwest Airlines, 1 stop, Dec 21, 2026 – Jan 1, 2027; $303 one way, Axel-exclusive, Southwest Airlines, 1 stop, Dec 21, 2026; 1 adult, economy, checked Oct 29, 2026. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. 1 checked bag per traveler included. 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.

Date links open published trip details for exploration. Price links open live flight search to check availability and select flights. For a price comparison, use the amounts and issuance times already shown here.

Exact travel datesAirlineFlightsTimes, duration, stopsTotal pricePrice issued (UTC)
2026-12-21 · one wayJetBlue AirwaysB6183318:30:00→22:20:00 6h 50m nonstop · 1 checked bagAxel-exclusive $339.502026-10-29T00:52:48Z
2026-12-21 · one waySouthwest AirlinesWN1537 + WN210405:00:00→10:30:00 8h 30m 1 stop via DEN · 1 checked bagAxel-exclusive $303.252026-10-29T00:52:48Z
2026-12-21 → 2026-12-22JetBlue AirwaysB61833 / B6273418:30:00→22:20:00 6h 50m nonstop · 11:30:00→20:07:00 5h 37m nonstop · 1 checked bagAxel-exclusive $650.002026-10-29T00:52:48Z
2026-12-21 → 2026-12-22Southwest AirlinesWN1537 + WN2104 / WN2331 + WN290005:00:00→10:30:00 8h 30m 1 stop via DEN · 06:00:00→16:20:00 7h 20m 1 stop via MDW · 1 checked bagAxel-exclusive $577.502026-10-29T00:52:48Z
2026-12-21 → 2026-12-23JetBlue AirwaysB61833 / B633418:30:00→22:20:00 6h 50m nonstop · 15:25:00→23:59:00 5h 34m nonstop · 1 checked bagAxel-exclusive $650.002026-10-29T00:52:48Z
2026-12-21 → 2026-12-23Southwest AirlinesWN1537 + WN2104 / WN2331 + WN290005:00:00→10:30:00 8h 30m 1 stop via DEN · 06:00:00→16:20:00 7h 20m 1 stop via MDW · 1 checked bagAxel-exclusive $577.502026-10-29T00:52:48Z
2026-12-21 → 2026-12-24JetBlue AirwaysB61833 / B6183418:30:00→22:20:00 6h 50m nonstop · 06:00:00→14:31:00 5h 31m nonstop · 1 checked bagAxel-exclusive $650.002026-10-29T00:52:48Z
2026-12-21 → 2026-12-24Southwest AirlinesWN1537 + WN2104 / WN2331 + WN290005:00:00→10:30:00 8h 30m 1 stop via DEN · 06:00:00→16:20:00 7h 20m 1 stop via MDW · 1 checked bagAxel-exclusive $577.502026-10-29T00:52:48Z
2026-12-21 → 2026-12-25JetBlue AirwaysB61833 / B643418:30:00→22:20:00 6h 50m nonstop · 08:10:00→16:45:00 5h 35m nonstop · 1 checked bagAxel-exclusive $650.002026-10-29T00:52:48Z
2026-12-21 → 2026-12-25Southwest AirlinesWN1537 + WN2104 / WN2989 + WN443105:00:00→10:30:00 8h 30m 1 stop via DEN · 13:05:00→23:25:00 7h 20m 1 stop via STL · 1 checked bagAxel-exclusive $577.502026-10-29T00:52:48Z
2026-12-21 → 2026-12-26JetBlue AirwaysB61833 / B643418:30:00→22:20:00 6h 50m nonstop · 08:10:00→16:45:00 5h 35m nonstop · 1 checked bagAxel-exclusive $650.002026-10-29T00:52:48Z
2026-12-21 → 2026-12-26Southwest AirlinesWN1537 + WN2104 / WN2331 + WN290005:00:00→10:30:00 8h 30m 1 stop via DEN · 06:00:00→16:20:00 7h 20m 1 stop via MDW · 1 checked bagAxel-exclusive $577.502026-10-29T00:52:48Z
2026-12-21 → 2026-12-27United AirlinesUA2441 / UA79606:00:00→09:51:00 6h 51m nonstop · 21:25:00→06:05:00 5h 40m nonstop · 1 checked bagAxel-exclusive $708.002026-10-29T00:52:48Z
2026-12-21 → 2026-12-27Southwest AirlinesWN1537 + WN2104 / WN2331 + WN290005:00:00→10:30:00 8h 30m 1 stop via DEN · 06:00:00→16:20:00 7h 20m 1 stop via MDW · 1 checked bagAxel-exclusive $577.502026-10-29T00:52:48Z
2026-12-21 → 2026-12-28JetBlue AirwaysB61833 / B643418:30:00→22:20:00 6h 50m nonstop · 07:30:00→16:05:00 5h 35m nonstop · 1 checked bagAxel-exclusive $650.002026-10-29T00:52:48Z
2026-12-21 → 2026-12-28Southwest AirlinesWN1537 + WN2104 / WN2331 + WN290005:00:00→10:30:00 8h 30m 1 stop via DEN · 06:00:00→16:20:00 7h 20m 1 stop via MDW · 1 checked bagAxel-exclusive $577.502026-10-29T00:52:48Z
2026-12-21 → 2026-12-29JetBlue AirwaysB61833 / B6273418:30:00→22:20:00 6h 50m nonstop · 11:30:00→20:07:00 5h 37m nonstop · 1 checked bagAxel-exclusive $650.002026-10-29T00:52:48Z
2026-12-21 → 2026-12-29Southwest AirlinesWN1537 + WN2104 / WN2331 + WN290005:00:00→10:30:00 8h 30m 1 stop via DEN · 06:00:00→16:20:00 7h 20m 1 stop via MDW · 1 checked bagAxel-exclusive $577.502026-10-29T00:52:48Z
2026-12-21 → 2026-12-30JetBlue AirwaysB61833 / B633418:30:00→22:20:00 6h 50m nonstop · 15:25:00→23:59:00 5h 34m nonstop · 1 checked bagAxel-exclusive $650.002026-10-29T00:52:48Z
2026-12-21 → 2026-12-30Southwest AirlinesWN1537 + WN2104 / WN2331 + WN290005:00:00→10:30:00 8h 30m 1 stop via DEN · 06:00:00→16:20:00 7h 20m 1 stop via MDW · 1 checked bagAxel-exclusive $577.502026-10-29T00:52:48Z
2026-12-21 → 2026-12-31JetBlue AirwaysB61833 / B6183418:30:00→22:20:00 6h 50m nonstop · 06:00:00→14:31:00 5h 31m nonstop · 1 checked bagAxel-exclusive $650.002026-10-29T00:52:48Z
2026-12-21 → 2026-12-31Southwest AirlinesWN1537 + WN2104 / WN2331 + WN290005:00:00→10:30:00 8h 30m 1 stop via DEN · 06:00:00→16:20:00 7h 20m 1 stop via MDW · 1 checked bagAxel-exclusive $577.502026-10-29T00:52:48Z
2026-12-21 → 2027-01-01JetBlue AirwaysB61833 / B643418:30:00→22:20:00 6h 50m nonstop · 08:10:00→16:45:00 5h 35m nonstop · 1 checked bagAxel-exclusive $634.002026-10-29T00:52:48Z
2026-12-21 → 2027-01-01Southwest AirlinesWN1537 + WN2104 / WN2989 + WN443105:00:00→10:30:00 8h 30m 1 stop via DEN · 13:05:00→23:25:00 7h 20m 1 stop via STL · 1 checked bagAxel-exclusive $563.502026-10-29T00:52:48Z
2026-12-21 → 2027-01-02JetBlue AirwaysB61833 / B643418:30:00→22:20:00 6h 50m nonstop · 08:10:00→16:45:00 5h 35m nonstop · 1 checked bagAxel-exclusive $634.002026-10-29T00:52:48Z
2026-12-21 → 2027-01-02Southwest AirlinesWN1537 + WN2104 / WN2331 + WN290005:00:00→10:30:00 8h 30m 1 stop via DEN · 06:00:00→16:20:00 7h 20m 1 stop via MDW · 1 checked bagAxel-exclusive $563.502026-10-29T00:52:48Z
2026-12-21 → 2027-01-03United AirlinesUA2441 / UA79606:00:00→09:51:00 6h 51m nonstop · 21:25:00→06:05:00 5h 40m nonstop · 1 checked bagAxel-exclusive $690.402026-10-29T00:52:48Z
2026-12-21 → 2027-01-03Southwest AirlinesWN1537 + WN2104 / WN2331 + WN290005:00:00→10:30:00 8h 30m 1 stop via DEN · 06:00:00→16:20:00 7h 20m 1 stop via MDW · 1 checked bagAxel-exclusive $563.502026-10-29T00:52:48Z
2026-12-21 → 2027-01-04JetBlue AirwaysB61833 / B643418:30:00→22:20:00 6h 50m nonstop · 07:30:00→16:05:00 5h 35m nonstop · 1 checked bagAxel-exclusive $634.002026-10-29T00:52:48Z
2026-12-21 → 2027-01-04Southwest AirlinesWN1537 + WN2104 / WN2331 + WN290005:00:00→10:30:00 8h 30m 1 stop via DEN · 06:00:00→16:20:00 7h 20m 1 stop via MDW · 1 checked bagAxel-exclusive $563.502026-10-29T00:52:48Z

Hotels in San Francisco for these trips

Hotels: under a trip, hotels in San Francisco for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates.

All hotels in San Francisco

Route overview: Boston to San Francisco (SFO) flight deals

2026-12-21 · one way · Axel-exclusive $303.25

  • Southwest Airlines WN1537 / WN2104: BOS 2026-12-21 05:00:00 → SFO 2026-12-21 10:30:00; 1 stop(s) via DEN; 510 minutes. Local airport times.
    • WN1537: BOS 2026-12-21 05:00:00 → DEN 2026-12-21 07:40:00; layover at DEN: 60 minutes.
    • WN2104: DEN 2026-12-21 08:40:00 → SFO 2026-12-21 10:30:00.

2026-12-21 · one way · Axel-exclusive $339.50

  • JetBlue Airways B61833: BOS 2026-12-21 18:30:00 → SFO 2026-12-21 22:20:00; nonstop; 410 minutes. Local airport times.

2026-12-21 → 2026-12-22 · Axel-exclusive $577.50

  • Southwest Airlines WN1537 / WN2104: BOS 2026-12-21 05:00:00 → SFO 2026-12-21 10:30:00; 1 stop(s) via DEN; 510 minutes. Local airport times.
    • WN1537: BOS 2026-12-21 05:00:00 → DEN 2026-12-21 07:40:00; layover at DEN: 60 minutes.
    • WN2104: DEN 2026-12-21 08:40:00 → SFO 2026-12-21 10:30:00.
  • Southwest Airlines WN2331 / WN2900: SFO 2026-12-22 06:00:00 → BOS 2026-12-22 16:20:00; 1 stop(s) via MDW; 440 minutes. Local airport times.
    • WN2331: SFO 2026-12-22 06:00:00 → MDW 2026-12-22 12:15:00; layover at MDW: 60 minutes.
    • WN2900: MDW 2026-12-22 13:15:00 → BOS 2026-12-22 16:20:00.

2026-12-21 → 2026-12-22 · Axel-exclusive $650.00

  • JetBlue Airways B61833: BOS 2026-12-21 18:30:00 → SFO 2026-12-21 22:20:00; nonstop; 410 minutes. Local airport times.
  • JetBlue Airways B62734: SFO 2026-12-22 11:30:00 → BOS 2026-12-22 20:07:00; nonstop; 337 minutes. Local airport times.

2026-12-21 → 2026-12-23 · Axel-exclusive $577.50

  • Southwest Airlines WN1537 / WN2104: BOS 2026-12-21 05:00:00 → SFO 2026-12-21 10:30:00; 1 stop(s) via DEN; 510 minutes. Local airport times.
    • WN1537: BOS 2026-12-21 05:00:00 → DEN 2026-12-21 07:40:00; layover at DEN: 60 minutes.
    • WN2104: DEN 2026-12-21 08:40:00 → SFO 2026-12-21 10:30:00.
  • Southwest Airlines WN2331 / WN2900: SFO 2026-12-23 06:00:00 → BOS 2026-12-23 16:20:00; 1 stop(s) via MDW; 440 minutes. Local airport times.
    • WN2331: SFO 2026-12-23 06:00:00 → MDW 2026-12-23 12:15:00; layover at MDW: 60 minutes.
    • WN2900: MDW 2026-12-23 13:15:00 → BOS 2026-12-23 16:20:00.

2026-12-21 → 2026-12-23 · Axel-exclusive $650.00

  • JetBlue Airways B61833: BOS 2026-12-21 18:30:00 → SFO 2026-12-21 22:20:00; nonstop; 410 minutes. Local airport times.
  • JetBlue Airways B6334: SFO 2026-12-23 15:25:00 → BOS 2026-12-23 23:59:00; nonstop; 334 minutes. Local airport times.

2026-12-21 → 2026-12-24 · Axel-exclusive $577.50

  • Southwest Airlines WN1537 / WN2104: BOS 2026-12-21 05:00:00 → SFO 2026-12-21 10:30:00; 1 stop(s) via DEN; 510 minutes. Local airport times.
    • WN1537: BOS 2026-12-21 05:00:00 → DEN 2026-12-21 07:40:00; layover at DEN: 60 minutes.
    • WN2104: DEN 2026-12-21 08:40:00 → SFO 2026-12-21 10:30:00.
  • Southwest Airlines WN2331 / WN2900: SFO 2026-12-24 06:00:00 → BOS 2026-12-24 16:20:00; 1 stop(s) via MDW; 440 minutes. Local airport times.
    • WN2331: SFO 2026-12-24 06:00:00 → MDW 2026-12-24 12:15:00; layover at MDW: 60 minutes.
    • WN2900: MDW 2026-12-24 13:15:00 → BOS 2026-12-24 16:20:00.

2026-12-21 → 2026-12-24 · Axel-exclusive $650.00

  • JetBlue Airways B61833: BOS 2026-12-21 18:30:00 → SFO 2026-12-21 22:20:00; nonstop; 410 minutes. Local airport times.
  • JetBlue Airways B61834: SFO 2026-12-24 06:00:00 → BOS 2026-12-24 14:31:00; nonstop; 331 minutes. Local airport times.

2026-12-21 → 2026-12-25 · Axel-exclusive $577.50

  • Southwest Airlines WN1537 / WN2104: BOS 2026-12-21 05:00:00 → SFO 2026-12-21 10:30:00; 1 stop(s) via DEN; 510 minutes. Local airport times.
    • WN1537: BOS 2026-12-21 05:00:00 → DEN 2026-12-21 07:40:00; layover at DEN: 60 minutes.
    • WN2104: DEN 2026-12-21 08:40:00 → SFO 2026-12-21 10:30:00.
  • Southwest Airlines WN2989 / WN4431: SFO 2026-12-25 13:05:00 → BOS 2026-12-25 23:25:00; 1 stop(s) via STL; 440 minutes. Local airport times.
    • WN2989: SFO 2026-12-25 13:05:00 → STL 2026-12-25 18:55:00; layover at STL: 60 minutes.
    • WN4431: STL 2026-12-25 19:55:00 → BOS 2026-12-25 23:25:00.

2026-12-21 → 2026-12-25 · Axel-exclusive $650.00

  • JetBlue Airways B61833: BOS 2026-12-21 18:30:00 → SFO 2026-12-21 22:20:00; nonstop; 410 minutes. Local airport times.
  • JetBlue Airways B6434: SFO 2026-12-25 08:10:00 → BOS 2026-12-25 16:45:00; nonstop; 335 minutes. Local airport times.

2026-12-21 → 2026-12-27 · Axel-exclusive $577.50

  • Southwest Airlines WN1537 / WN2104: BOS 2026-12-21 05:00:00 → SFO 2026-12-21 10:30:00; 1 stop(s) via DEN; 510 minutes. Local airport times.
    • WN1537: BOS 2026-12-21 05:00:00 → DEN 2026-12-21 07:40:00; layover at DEN: 60 minutes.
    • WN2104: DEN 2026-12-21 08:40:00 → SFO 2026-12-21 10:30:00.
  • Southwest Airlines WN2331 / WN2900: SFO 2026-12-27 06:00:00 → BOS 2026-12-27 16:20:00; 1 stop(s) via MDW; 440 minutes. Local airport times.
    • WN2331: SFO 2026-12-27 06:00:00 → MDW 2026-12-27 12:15:00; layover at MDW: 60 minutes.
    • WN2900: MDW 2026-12-27 13:15:00 → BOS 2026-12-27 16:20:00.

2026-12-21 → 2026-12-27 · Axel-exclusive $708.00

  • United Airlines UA2441: BOS 2026-12-21 06:00:00 → SFO 2026-12-21 09:51:00; nonstop; 411 minutes. Local airport times.
  • United Airlines UA796: SFO 2026-12-27 21:25:00 → BOS 2026-12-28 06:05:00; nonstop; 340 minutes. Local airport times.

2026-12-21 → 2026-12-28 · Axel-exclusive $577.50

  • Southwest Airlines WN1537 / WN2104: BOS 2026-12-21 05:00:00 → SFO 2026-12-21 10:30:00; 1 stop(s) via DEN; 510 minutes. Local airport times.
    • WN1537: BOS 2026-12-21 05:00:00 → DEN 2026-12-21 07:40:00; layover at DEN: 60 minutes.
    • WN2104: DEN 2026-12-21 08:40:00 → SFO 2026-12-21 10:30:00.
  • Southwest Airlines WN2331 / WN2900: SFO 2026-12-28 06:00:00 → BOS 2026-12-28 16:20:00; 1 stop(s) via MDW; 440 minutes. Local airport times.
    • WN2331: SFO 2026-12-28 06:00:00 → MDW 2026-12-28 12:15:00; layover at MDW: 60 minutes.
    • WN2900: MDW 2026-12-28 13:15:00 → BOS 2026-12-28 16:20:00.

2026-12-21 → 2026-12-28 · Axel-exclusive $650.00

  • JetBlue Airways B61833: BOS 2026-12-21 18:30:00 → SFO 2026-12-21 22:20:00; nonstop; 410 minutes. Local airport times.
  • JetBlue Airways B6434: SFO 2026-12-28 07:30:00 → BOS 2026-12-28 16:05:00; nonstop; 335 minutes. Local airport times.

2026-12-21 → 2026-12-29 · Axel-exclusive $577.50

  • Southwest Airlines WN1537 / WN2104: BOS 2026-12-21 05:00:00 → SFO 2026-12-21 10:30:00; 1 stop(s) via DEN; 510 minutes. Local airport times.
    • WN1537: BOS 2026-12-21 05:00:00 → DEN 2026-12-21 07:40:00; layover at DEN: 60 minutes.
    • WN2104: DEN 2026-12-21 08:40:00 → SFO 2026-12-21 10:30:00.
  • Southwest Airlines WN2331 / WN2900: SFO 2026-12-29 06:00:00 → BOS 2026-12-29 16:20:00; 1 stop(s) via MDW; 440 minutes. Local airport times.
    • WN2331: SFO 2026-12-29 06:00:00 → MDW 2026-12-29 12:15:00; layover at MDW: 60 minutes.
    • WN2900: MDW 2026-12-29 13:15:00 → BOS 2026-12-29 16:20:00.

2026-12-21 → 2026-12-29 · Axel-exclusive $650.00

  • JetBlue Airways B61833: BOS 2026-12-21 18:30:00 → SFO 2026-12-21 22:20:00; nonstop; 410 minutes. Local airport times.
  • JetBlue Airways B62734: SFO 2026-12-29 11:30:00 → BOS 2026-12-29 20:07:00; nonstop; 337 minutes. Local airport times.

2026-12-21 → 2026-12-31 · Axel-exclusive $577.50

  • Southwest Airlines WN1537 / WN2104: BOS 2026-12-21 05:00:00 → SFO 2026-12-21 10:30:00; 1 stop(s) via DEN; 510 minutes. Local airport times.
    • WN1537: BOS 2026-12-21 05:00:00 → DEN 2026-12-21 07:40:00; layover at DEN: 60 minutes.
    • WN2104: DEN 2026-12-21 08:40:00 → SFO 2026-12-21 10:30:00.
  • Southwest Airlines WN2331 / WN2900: SFO 2026-12-31 06:00:00 → BOS 2026-12-31 16:20:00; 1 stop(s) via MDW; 440 minutes. Local airport times.
    • WN2331: SFO 2026-12-31 06:00:00 → MDW 2026-12-31 12:15:00; layover at MDW: 60 minutes.
    • WN2900: MDW 2026-12-31 13:15:00 → BOS 2026-12-31 16:20:00.

2026-12-21 → 2026-12-31 · Axel-exclusive $650.00

  • JetBlue Airways B61833: BOS 2026-12-21 18:30:00 → SFO 2026-12-21 22:20:00; nonstop; 410 minutes. Local airport times.
  • JetBlue Airways B61834: SFO 2026-12-31 06:00:00 → BOS 2026-12-31 14:31:00; nonstop; 331 minutes. Local airport times.

2026-12-21 → 2027-01-01 · Axel-exclusive $563.50

  • Southwest Airlines WN1537 / WN2104: BOS 2026-12-21 05:00:00 → SFO 2026-12-21 10:30:00; 1 stop(s) via DEN; 510 minutes. Local airport times.
    • WN1537: BOS 2026-12-21 05:00:00 → DEN 2026-12-21 07:40:00; layover at DEN: 60 minutes.
    • WN2104: DEN 2026-12-21 08:40:00 → SFO 2026-12-21 10:30:00.
  • Southwest Airlines WN2989 / WN4431: SFO 2027-01-01 13:05:00 → BOS 2027-01-01 23:25:00; 1 stop(s) via STL; 440 minutes. Local airport times.
    • WN2989: SFO 2027-01-01 13:05:00 → STL 2027-01-01 18:55:00; layover at STL: 60 minutes.
    • WN4431: STL 2027-01-01 19:55:00 → BOS 2027-01-01 23:25:00.

2026-12-21 → 2027-01-01 · Axel-exclusive $634.00

  • JetBlue Airways B61833: BOS 2026-12-21 18:30:00 → SFO 2026-12-21 22:20:00; nonstop; 410 minutes. Local airport times.
  • JetBlue Airways B6434: SFO 2027-01-01 08:10:00 → BOS 2027-01-01 16:45:00; nonstop; 335 minutes. Local airport times.

2026-12-21 → 2027-01-02 · Axel-exclusive $563.50

  • Southwest Airlines WN1537 / WN2104: BOS 2026-12-21 05:00:00 → SFO 2026-12-21 10:30:00; 1 stop(s) via DEN; 510 minutes. Local airport times.
    • WN1537: BOS 2026-12-21 05:00:00 → DEN 2026-12-21 07:40:00; layover at DEN: 60 minutes.
    • WN2104: DEN 2026-12-21 08:40:00 → SFO 2026-12-21 10:30:00.
  • Southwest Airlines WN2331 / WN2900: SFO 2027-01-02 06:00:00 → BOS 2027-01-02 16:20:00; 1 stop(s) via MDW; 440 minutes. Local airport times.
    • WN2331: SFO 2027-01-02 06:00:00 → MDW 2027-01-02 12:15:00; layover at MDW: 60 minutes.
    • WN2900: MDW 2027-01-02 13:15:00 → BOS 2027-01-02 16:20:00.

2026-12-21 → 2027-01-02 · Axel-exclusive $634.00

  • JetBlue Airways B61833: BOS 2026-12-21 18:30:00 → SFO 2026-12-21 22:20:00; nonstop; 410 minutes. Local airport times.
  • JetBlue Airways B6434: SFO 2027-01-02 08:10:00 → BOS 2027-01-02 16:45:00; nonstop; 335 minutes. Local airport times.

2026-12-21 → 2027-01-04 · Axel-exclusive $563.50

  • Southwest Airlines WN1537 / WN2104: BOS 2026-12-21 05:00:00 → SFO 2026-12-21 10:30:00; 1 stop(s) via DEN; 510 minutes. Local airport times.
    • WN1537: BOS 2026-12-21 05:00:00 → DEN 2026-12-21 07:40:00; layover at DEN: 60 minutes.
    • WN2104: DEN 2026-12-21 08:40:00 → SFO 2026-12-21 10:30:00.
  • Southwest Airlines WN2331 / WN2900: SFO 2027-01-04 06:00:00 → BOS 2027-01-04 16:20:00; 1 stop(s) via MDW; 440 minutes. Local airport times.
    • WN2331: SFO 2027-01-04 06:00:00 → MDW 2027-01-04 12:15:00; layover at MDW: 60 minutes.
    • WN2900: MDW 2027-01-04 13:15:00 → BOS 2027-01-04 16:20:00.

2026-12-21 → 2027-01-04 · Axel-exclusive $634.00

  • JetBlue Airways B61833: BOS 2026-12-21 18:30:00 → SFO 2026-12-21 22:20:00; nonstop; 410 minutes. Local airport times.
  • JetBlue Airways B6434: SFO 2027-01-04 07:30:00 → BOS 2027-01-04 16:05:00; nonstop; 335 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Boston (BOS) to San Francisco (SFO) · Dec 21, 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. Under a trip, hotels in San Francisco for exactly those nights link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the lowest saved totals among the shortlisted hotels in each star tier for those dates.
  • Next: each row is one exact trip for this departure (both dates with the year, the total and the time its price was issued); its exact-trip price link opens the live search for those dates and travelers, where the booking link and the current total are. Other durations or travelers are not priced here: Choose travelers and dates prices the requested trip.
  • 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 Boston to San Francisco (SFO) 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.