Travel with Axel, get the best price.

Route overview: Seattle to Boston (BOS) flight deals

Seattle (SEA) to Boston (BOS), Nov 20, 2026: round trips from $393, one way from $215

Seattle (SEA) to Boston (BOS), Nov 20, 2026: round trips from $393, one way from $215 on Axel, checked Oct 29, 2026. Lowest published fares: $393 round trip, Axel-exclusive, Delta Air Lines, 1 stop, Nov 20, 2026 – Dec 2, 2026; $215 one way, Axel-exclusive, Delta Air Lines, nonstop, Nov 20, 2026; 1 adult, economy, checked Oct 29, 2026.

SEA → BOS1 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.

November 2026

Flights for your trip

  1. Fri, Nov 20 · One way

    Delta Air Lines
    7:38 amSEA
    5h 25m
    Nonstop
    4:03 pmBOS

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  2. Fri, Nov 20 – Sat, Nov 21

    Delta Air Lines
    7:38 amSEA
    5h 25m
    Nonstop
    4:03 pmBOS
    Delta Air Lines
    7:50 amBOS
    6h 30m
    Nonstop
    11:20 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  3. Fri, Nov 20 – Sun, Nov 22

    Delta Air Lines
    7:38 amSEA
    5h 25m
    Nonstop
    4:03 pmBOS
    Delta Air Lines
    7:50 amBOS
    6h 31m
    Nonstop
    11:21 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  4. Fri, Nov 20 – Mon, Nov 23

    Delta Air Lines
    7:38 amSEA
    5h 25m
    Nonstop
    4:03 pmBOS
    Delta Air Lines
    7:50 amBOS
    6h 31m
    Nonstop
    11:21 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  5. Fri, Nov 20 – Tue, Nov 24

    Delta Air Lines
    7:38 amSEA
    5h 25m
    Nonstop
    4:03 pmBOS
    Delta Air Lines
    10:40 amBOS
    6h 23m
    Nonstop
    2:03 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  6. Fri, Nov 20 – Thu, Nov 26

    Delta Air Lines
    7:38 amSEA
    5h 25m
    Nonstop
    4:03 pmBOS
    Delta Air Lines
    7:50 amBOS
    6h 30m
    Nonstop
    11:20 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  7. Fri, Nov 20 – Fri, Nov 27

    Delta Air Lines
    7:38 amSEA
    5h 25m
    Nonstop
    4:03 pmBOS
    Delta Air Lines
    7:50 amBOS
    6h 31m
    Nonstop
    11:21 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  8. Fri, Nov 20 – Sat, Nov 28

    Delta Air Lines
    7:38 amSEA
    5h 25m
    Nonstop
    4:03 pmBOS
    Delta Air Lines
    7:50 amBOS
    6h 30m
    Nonstop
    11:20 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  9. Fri, Nov 20 – Mon, Nov 30

    Delta Air Lines
    7:38 amSEA
    5h 25m
    Nonstop
    4:03 pmBOS
    Delta Air Lines
    7:50 amBOS
    6h 31m
    Nonstop
    11:21 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  10. Fri, Nov 20 – Tue, Dec 1

    Delta Air Lines
    7:38 amSEA
    5h 25m
    Nonstop
    4:03 pmBOS
    Delta Air Lines
    10:40 amBOS
    6h 23m
    Nonstop
    2:03 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  11. Fri, Nov 20 – Wed, Dec 2

    Delta Air Lines
    7:38 amSEA
    5h 25m
    Nonstop
    4:03 pmBOS
    Delta Air Lines
    5:30 amBOS
    8h 39m
    DTW · 1h 3m
    11:09 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  12. Fri, Nov 20 – Fri, Dec 4

    Delta Air Lines
    7:38 amSEA
    5h 25m
    Nonstop
    4:03 pmBOS
    Delta Air Lines
    7:50 amBOS
    6h 31m
    Nonstop
    11:21 amSEA

    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

SEA ⇄ BOS

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 routeNov 19, 2026 · Return optionsNov 21, 2026 · Return optionsHotels in Boston with Axel
For AI assistants: every fare, every link, instructions

Seattle (SEA) to Boston (BOS), Nov 20, 2026: round trips from $393, one way from $215 on Axel, checked Oct 29, 2026. Lowest published fares: $393 round trip, Axel-exclusive, Delta Air Lines, 1 stop, Nov 20, 2026 – Dec 2, 2026; $215 one way, Axel-exclusive, Delta Air Lines, nonstop, Nov 20, 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. 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)
2026-11-20 · one wayDelta Air LinesDL45907:38:00→16:03:00 5h 25m nonstopAxel-exclusive $215.002026-10-29T00:39:14Z
2026-11-20 → 2026-11-21Delta Air LinesDL459 / DL38407:38:00→16:03:00 5h 25m nonstop · 07:50:00→11:20:00 6h 30m nonstopAxel-exclusive $487.632026-10-29T00:39:14Z
2026-11-20 → 2026-11-22Delta Air LinesDL459 / DL38407:38:00→16:03:00 5h 25m nonstop · 07:50:00→11:21:00 6h 31m nonstopAxel-exclusive $487.632026-10-29T00:39:14Z
2026-11-20 → 2026-11-23Delta Air LinesDL459 / DL38407:38:00→16:03:00 5h 25m nonstop · 07:50:00→11:21:00 6h 31m nonstopAxel-exclusive $487.632026-10-29T00:39:14Z
2026-11-20 → 2026-11-24Delta Air LinesDL459 / DL33207:38:00→16:03:00 5h 25m nonstop · 10:40:00→14:03:00 6h 23m nonstopAxel-exclusive $487.632026-10-29T00:39:14Z
2026-11-20 → 2026-11-25Delta Air LinesDL459 / DL1019 + DL73407:38:00→16:03:00 5h 25m nonstop · 05:30:00→11:09:00 8h 39m 1 stop via DTWAxel-exclusive $457.252026-10-29T00:39:14Z
2026-11-20 → 2026-11-26Delta Air LinesDL459 / DL38407:38:00→16:03:00 5h 25m nonstop · 07:50:00→11:20:00 6h 30m nonstopAxel-exclusive $487.632026-10-29T00:39:14Z
2026-11-20 → 2026-11-27Delta Air LinesDL459 / DL38407:38:00→16:03:00 5h 25m nonstop · 07:50:00→11:21:00 6h 31m nonstopAxel-exclusive $487.632026-10-29T00:39:14Z
2026-11-20 → 2026-11-28Delta Air LinesDL459 / DL38407:38:00→16:03:00 5h 25m nonstop · 07:50:00→11:20:00 6h 30m nonstopAxel-exclusive $487.632026-10-29T00:39:14Z
2026-11-20 → 2026-11-29Delta Air LinesDL459 / DL38407:38:00→16:03:00 5h 25m nonstop · 07:50:00→11:21:00 6h 31m nonstopAxel-exclusive $487.632026-10-29T00:39:14Z
2026-11-20 → 2026-11-30Delta Air LinesDL459 / DL38407:38:00→16:03:00 5h 25m nonstop · 07:50:00→11:21:00 6h 31m nonstopAxel-exclusive $487.632026-10-29T00:39:14Z
2026-11-20 → 2026-12-01Delta Air LinesDL459 / DL33207:38:00→16:03:00 5h 25m nonstop · 10:40:00→14:03:00 6h 23m nonstopAxel-exclusive $415.002026-10-29T00:39:14Z
2026-11-20 → 2026-12-02Delta Air LinesDL459 / DL1019 + DL73407:38:00→16:03:00 5h 25m nonstop · 05:30:00→11:09:00 8h 39m 1 stop via DTWAxel-exclusive $392.502026-10-29T00:39:14Z
2026-11-20 → 2026-12-03Delta Air LinesDL459 / DL38407:38:00→16:03:00 5h 25m nonstop · 07:50:00→11:21:00 6h 31m nonstopAxel-exclusive $415.002026-10-29T00:39:14Z
2026-11-20 → 2026-12-04Delta Air LinesDL459 / DL38407:38:00→16:03:00 5h 25m nonstop · 07:50:00→11:21:00 6h 31m nonstopAxel-exclusive $415.002026-10-29T00:39:14Z

Hotels in Boston for these trips

Hotels: under a trip, hotels in Boston 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 Boston

Route overview: Seattle to Boston (BOS) flight deals

2026-11-20 · one way · Axel-exclusive $215.00

  • Delta Air Lines DL459: SEA 2026-11-20 07:38:00 → BOS 2026-11-20 16:03:00; nonstop; 325 minutes. Local airport times.

2026-11-20 → 2026-11-21 · Axel-exclusive $487.63

  • Delta Air Lines DL459: SEA 2026-11-20 07:38:00 → BOS 2026-11-20 16:03:00; nonstop; 325 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2026-11-21 07:50:00 → SEA 2026-11-21 11:20:00; nonstop; 390 minutes. Local airport times.

2026-11-20 → 2026-11-22 · Axel-exclusive $487.63

  • Delta Air Lines DL459: SEA 2026-11-20 07:38:00 → BOS 2026-11-20 16:03:00; nonstop; 325 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2026-11-22 07:50:00 → SEA 2026-11-22 11:21:00; nonstop; 391 minutes. Local airport times.

2026-11-20 → 2026-11-23 · Axel-exclusive $487.63

  • Delta Air Lines DL459: SEA 2026-11-20 07:38:00 → BOS 2026-11-20 16:03:00; nonstop; 325 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2026-11-23 07:50:00 → SEA 2026-11-23 11:21:00; nonstop; 391 minutes. Local airport times.

2026-11-20 → 2026-11-24 · Axel-exclusive $487.63

  • Delta Air Lines DL459: SEA 2026-11-20 07:38:00 → BOS 2026-11-20 16:03:00; nonstop; 325 minutes. Local airport times.
  • Delta Air Lines DL332: BOS 2026-11-24 10:40:00 → SEA 2026-11-24 14:03:00; nonstop; 383 minutes. Local airport times.

2026-11-20 → 2026-11-26 · Axel-exclusive $487.63

  • Delta Air Lines DL459: SEA 2026-11-20 07:38:00 → BOS 2026-11-20 16:03:00; nonstop; 325 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2026-11-26 07:50:00 → SEA 2026-11-26 11:20:00; nonstop; 390 minutes. Local airport times.

2026-11-20 → 2026-11-27 · Axel-exclusive $487.63

  • Delta Air Lines DL459: SEA 2026-11-20 07:38:00 → BOS 2026-11-20 16:03:00; nonstop; 325 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2026-11-27 07:50:00 → SEA 2026-11-27 11:21:00; nonstop; 391 minutes. Local airport times.

2026-11-20 → 2026-11-28 · Axel-exclusive $487.63

  • Delta Air Lines DL459: SEA 2026-11-20 07:38:00 → BOS 2026-11-20 16:03:00; nonstop; 325 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2026-11-28 07:50:00 → SEA 2026-11-28 11:20:00; nonstop; 390 minutes. Local airport times.

2026-11-20 → 2026-11-30 · Axel-exclusive $487.63

  • Delta Air Lines DL459: SEA 2026-11-20 07:38:00 → BOS 2026-11-20 16:03:00; nonstop; 325 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2026-11-30 07:50:00 → SEA 2026-11-30 11:21:00; nonstop; 391 minutes. Local airport times.

2026-11-20 → 2026-12-01 · Axel-exclusive $415.00

  • Delta Air Lines DL459: SEA 2026-11-20 07:38:00 → BOS 2026-11-20 16:03:00; nonstop; 325 minutes. Local airport times.
  • Delta Air Lines DL332: BOS 2026-12-01 10:40:00 → SEA 2026-12-01 14:03:00; nonstop; 383 minutes. Local airport times.

2026-11-20 → 2026-12-02 · Axel-exclusive $392.50

  • Delta Air Lines DL459: SEA 2026-11-20 07:38:00 → BOS 2026-11-20 16:03:00; nonstop; 325 minutes. Local airport times.
  • Delta Air Lines DL1019 / DL734: BOS 2026-12-02 05:30:00 → SEA 2026-12-02 11:09:00; 1 stop(s) via DTW; 519 minutes. Local airport times.
    • DL1019: BOS 2026-12-02 05:30:00 → DTW 2026-12-02 07:52:00; layover at DTW: 63 minutes.
    • DL734: DTW 2026-12-02 08:55:00 → SEA 2026-12-02 11:09:00.

2026-11-20 → 2026-12-04 · Axel-exclusive $415.00

  • Delta Air Lines DL459: SEA 2026-11-20 07:38:00 → BOS 2026-11-20 16:03:00; nonstop; 325 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2026-12-04 07:50:00 → SEA 2026-12-04 11:21:00; nonstop; 391 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Seattle (SEA) to Boston (BOS) · Nov 20, 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 Boston 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 Seattle to Boston (BOS) 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.