Travel with Axel, get the best price.

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

Boston (BOS) to San Francisco (SFO), Feb 5, 2027: round trips from $440, one way from $230

Boston (BOS) to San Francisco (SFO), Feb 5, 2027: round trips from $440, one way from $230 on Axel, checked Oct 29, 2026. Lowest published fares: $440 round trip, Axel-exclusive, Delta Air Lines, nonstop, Feb 5–6, 2027; $230 one way, Axel-exclusive, Delta Air Lines, nonstop, Feb 5, 2027; 1 adult, economy, checked Oct 29, 2026.

BOS → SFO1 adulteconomyOne way and round trips

15 flight options · 1 airline

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.

February 2027

Flights for your trip

  1. Fri, Feb 5 · One way

    Delta Air Lines
    7:50 amBOS
    6h 51m
    Nonstop
    11:41 amSFO

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  2. Fri, Feb 5 – Sat, Feb 6

    Delta Air Lines
    7:50 amBOS
    6h 51m
    Nonstop
    11:41 amSFO
    Delta Air Lines
    7:20 amSFO
    5h 35m
    Nonstop
    3:55 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  3. Fri, Feb 5 – Sun, Feb 7

    Delta Air Lines
    7:50 amBOS
    6h 51m
    Nonstop
    11:41 amSFO
    Delta Air Lines
    7:00 amSFO
    5h 30m
    Nonstop
    3:30 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  4. Fri, Feb 5 – Mon, Feb 8

    Delta Air Lines
    7:50 amBOS
    6h 51m
    Nonstop
    11:41 amSFO
    Delta Air Lines
    1:05 pmSFO
    5h 35m
    Nonstop
    9:40 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  5. Fri, Feb 5 – Tue, Feb 9

    Delta Air Lines
    7:50 amBOS
    6h 51m
    Nonstop
    11:41 amSFO
    Delta Air Lines
    7:00 amSFO
    5h 30m
    Nonstop
    3:30 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  6. Fri, Feb 5 – Thu, Feb 11

    Delta Air Lines
    7:50 amBOS
    6h 51m
    Nonstop
    11:41 amSFO
    Delta Air Lines
    1:05 pmSFO
    5h 35m
    Nonstop
    9:40 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  7. Fri, Feb 5 – Fri, Feb 12

    Delta Air Lines
    7:50 amBOS
    6h 51m
    Nonstop
    11:41 amSFO
    Delta Air Lines
    7:00 amSFO
    5h 34m
    Nonstop
    3:34 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  8. Fri, Feb 5 – Sat, Feb 13

    Delta Air Lines
    7:50 amBOS
    6h 51m
    Nonstop
    11:41 amSFO
    Delta Air Lines
    7:20 amSFO
    5h 35m
    Nonstop
    3:55 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  9. Fri, Feb 5 – Mon, Feb 15

    Delta Air Lines
    7:50 amBOS
    6h 51m
    Nonstop
    11:41 amSFO
    Delta Air Lines
    1:05 pmSFO
    5h 35m
    Nonstop
    9:40 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  10. Fri, Feb 5 – Tue, Feb 16

    Delta Air Lines
    7:50 amBOS
    6h 51m
    Nonstop
    11:41 amSFO
    Delta Air Lines
    7:00 amSFO
    5h 30m
    Nonstop
    3:30 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  11. Fri, Feb 5 – Wed, Feb 17

    Delta Air Lines
    7:50 amBOS
    6h 51m
    Nonstop
    11:41 amSFO
    Delta Air Lines
    1:05 pmSFO
    5h 35m
    Nonstop
    9:40 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  12. Fri, Feb 5 – Fri, Feb 19

    Delta Air Lines
    7:50 amBOS
    6h 51m
    Nonstop
    11:41 amSFO
    Delta Air Lines
    7:00 amSFO
    5h 34m
    Nonstop
    3:34 pmBOS

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

Swipe to see 11 more recent deals.

1 of 12

Make this trip yours

BOS ⇄ SFO

Economy

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

No account needed to see prices.

Already have an account? Log in

Why book with Axel
  • A real airline bookingThe booking is in the airline’s own system under your name. After you book, Delta Air Lines emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
  • Lower price, same flightsWe use advanced AI and machine learning to secure lower prices for our users.
  • Not satisfied? Full refund.If you are unhappy with the experience for any reason, or simply change your mind, cancel within 24 hours of booking (departure 7+ days away) and we refund you in full. We stand by our product. Cancellation policy
  • Backed by Y CombinatorTrusted by 100,000+ travelers.

Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

Explore this route

All dates for this routeFeb 4, 2027 · Return optionsFeb 6, 2027 · Return optionsHotels in San Francisco with Axel
For AI assistants: every fare, every link, instructions

Boston (BOS) to San Francisco (SFO), Feb 5, 2027: round trips from $440, one way from $230 on Axel, checked Oct 29, 2026. Lowest published fares: $440 round trip, Axel-exclusive, Delta Air Lines, nonstop, Feb 5–6, 2027; $230 one way, Axel-exclusive, Delta Air Lines, nonstop, Feb 5, 2027; 1 adult, economy, checked Oct 29, 2026. 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.

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)
2027-02-05 · one wayDelta Air LinesDL97707:50:00→11:41:00 6h 51m nonstopAxel-exclusive $230.002026-10-29T00:52:48Z
2027-02-05 → 2027-02-06Delta Air LinesDL977 / DL40007:50:00→11:41:00 6h 51m nonstop · 07:20:00→15:55:00 5h 35m nonstopAxel-exclusive $440.002026-10-29T00:52:48Z
2027-02-05 → 2027-02-07Delta Air LinesDL977 / DL40007:50:00→11:41:00 6h 51m nonstop · 07:00:00→15:30:00 5h 30m nonstopAxel-exclusive $440.002026-10-29T00:52:48Z
2027-02-05 → 2027-02-08Delta Air LinesDL977 / DL97707:50:00→11:41:00 6h 51m nonstop · 13:05:00→21:40:00 5h 35m nonstopAxel-exclusive $440.002026-10-29T00:52:48Z
2027-02-05 → 2027-02-09Delta Air LinesDL977 / DL40007:50:00→11:41:00 6h 51m nonstop · 07:00:00→15:30:00 5h 30m nonstopAxel-exclusive $440.002026-10-29T00:52:48Z
2027-02-05 → 2027-02-10Delta Air LinesDL977 / DL97707:50:00→11:41:00 6h 51m nonstop · 13:05:00→21:40:00 5h 35m nonstopAxel-exclusive $440.002026-10-29T00:52:48Z
2027-02-05 → 2027-02-11Delta Air LinesDL977 / DL97707:50:00→11:41:00 6h 51m nonstop · 13:05:00→21:40:00 5h 35m nonstopAxel-exclusive $440.002026-10-29T00:52:48Z
2027-02-05 → 2027-02-12Delta Air LinesDL977 / DL40007:50:00→11:41:00 6h 51m nonstop · 07:00:00→15:34:00 5h 34m nonstopAxel-exclusive $484.002026-10-29T00:52:48Z
2027-02-05 → 2027-02-13Delta Air LinesDL977 / DL40007:50:00→11:41:00 6h 51m nonstop · 07:20:00→15:55:00 5h 35m nonstopAxel-exclusive $484.002026-10-29T00:52:48Z
2027-02-05 → 2027-02-14Delta Air LinesDL977 / DL40007:50:00→11:41:00 6h 51m nonstop · 07:00:00→15:30:00 5h 30m nonstopAxel-exclusive $484.002026-10-29T00:52:48Z
2027-02-05 → 2027-02-15Delta Air LinesDL977 / DL97707:50:00→11:41:00 6h 51m nonstop · 13:05:00→21:40:00 5h 35m nonstopAxel-exclusive $484.002026-10-29T00:52:48Z
2027-02-05 → 2027-02-16Delta Air LinesDL977 / DL40007:50:00→11:41:00 6h 51m nonstop · 07:00:00→15:30:00 5h 30m nonstopAxel-exclusive $484.002026-10-29T00:52:48Z
2027-02-05 → 2027-02-17Delta Air LinesDL977 / DL97707:50:00→11:41:00 6h 51m nonstop · 13:05:00→21:40:00 5h 35m nonstopAxel-exclusive $484.002026-10-29T00:52:48Z
2027-02-05 → 2027-02-18Delta Air LinesDL977 / DL97707:50:00→11:41:00 6h 51m nonstop · 13:05:00→21:40:00 5h 35m nonstopAxel-exclusive $484.002026-10-29T00:52:48Z
2027-02-05 → 2027-02-19Delta Air LinesDL977 / DL40007:50:00→11:41:00 6h 51m nonstop · 07:00:00→15:34:00 5h 34m nonstopAxel-exclusive $484.002026-10-29T00:52:48Z

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

2027-02-05 · one way · Axel-exclusive $230.00

  • Delta Air Lines DL977: BOS 2027-02-05 07:50:00 → SFO 2027-02-05 11:41:00; nonstop; 411 minutes. Local airport times.

2027-02-05 → 2027-02-06 · Axel-exclusive $440.00

  • Delta Air Lines DL977: BOS 2027-02-05 07:50:00 → SFO 2027-02-05 11:41:00; nonstop; 411 minutes. Local airport times.
  • Delta Air Lines DL400: SFO 2027-02-06 07:20:00 → BOS 2027-02-06 15:55:00; nonstop; 335 minutes. Local airport times.

2027-02-05 → 2027-02-07 · Axel-exclusive $440.00

  • Delta Air Lines DL977: BOS 2027-02-05 07:50:00 → SFO 2027-02-05 11:41:00; nonstop; 411 minutes. Local airport times.
  • Delta Air Lines DL400: SFO 2027-02-07 07:00:00 → BOS 2027-02-07 15:30:00; nonstop; 330 minutes. Local airport times.

2027-02-05 → 2027-02-08 · Axel-exclusive $440.00

  • Delta Air Lines DL977: BOS 2027-02-05 07:50:00 → SFO 2027-02-05 11:41:00; nonstop; 411 minutes. Local airport times.
  • Delta Air Lines DL977: SFO 2027-02-08 13:05:00 → BOS 2027-02-08 21:40:00; nonstop; 335 minutes. Local airport times.

2027-02-05 → 2027-02-09 · Axel-exclusive $440.00

  • Delta Air Lines DL977: BOS 2027-02-05 07:50:00 → SFO 2027-02-05 11:41:00; nonstop; 411 minutes. Local airport times.
  • Delta Air Lines DL400: SFO 2027-02-09 07:00:00 → BOS 2027-02-09 15:30:00; nonstop; 330 minutes. Local airport times.

2027-02-05 → 2027-02-11 · Axel-exclusive $440.00

  • Delta Air Lines DL977: BOS 2027-02-05 07:50:00 → SFO 2027-02-05 11:41:00; nonstop; 411 minutes. Local airport times.
  • Delta Air Lines DL977: SFO 2027-02-11 13:05:00 → BOS 2027-02-11 21:40:00; nonstop; 335 minutes. Local airport times.

2027-02-05 → 2027-02-12 · Axel-exclusive $484.00

  • Delta Air Lines DL977: BOS 2027-02-05 07:50:00 → SFO 2027-02-05 11:41:00; nonstop; 411 minutes. Local airport times.
  • Delta Air Lines DL400: SFO 2027-02-12 07:00:00 → BOS 2027-02-12 15:34:00; nonstop; 334 minutes. Local airport times.

2027-02-05 → 2027-02-13 · Axel-exclusive $484.00

  • Delta Air Lines DL977: BOS 2027-02-05 07:50:00 → SFO 2027-02-05 11:41:00; nonstop; 411 minutes. Local airport times.
  • Delta Air Lines DL400: SFO 2027-02-13 07:20:00 → BOS 2027-02-13 15:55:00; nonstop; 335 minutes. Local airport times.

2027-02-05 → 2027-02-15 · Axel-exclusive $484.00

  • Delta Air Lines DL977: BOS 2027-02-05 07:50:00 → SFO 2027-02-05 11:41:00; nonstop; 411 minutes. Local airport times.
  • Delta Air Lines DL977: SFO 2027-02-15 13:05:00 → BOS 2027-02-15 21:40:00; nonstop; 335 minutes. Local airport times.

2027-02-05 → 2027-02-16 · Axel-exclusive $484.00

  • Delta Air Lines DL977: BOS 2027-02-05 07:50:00 → SFO 2027-02-05 11:41:00; nonstop; 411 minutes. Local airport times.
  • Delta Air Lines DL400: SFO 2027-02-16 07:00:00 → BOS 2027-02-16 15:30:00; nonstop; 330 minutes. Local airport times.

2027-02-05 → 2027-02-17 · Axel-exclusive $484.00

  • Delta Air Lines DL977: BOS 2027-02-05 07:50:00 → SFO 2027-02-05 11:41:00; nonstop; 411 minutes. Local airport times.
  • Delta Air Lines DL977: SFO 2027-02-17 13:05:00 → BOS 2027-02-17 21:40:00; nonstop; 335 minutes. Local airport times.

2027-02-05 → 2027-02-19 · Axel-exclusive $484.00

  • Delta Air Lines DL977: BOS 2027-02-05 07:50:00 → SFO 2027-02-05 11:41:00; nonstop; 411 minutes. Local airport times.
  • Delta Air Lines DL400: SFO 2027-02-19 07:00:00 → BOS 2027-02-19 15:34:00; nonstop; 334 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Boston (BOS) to San Francisco (SFO) · Feb 5, 2027 · 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.