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Route overview: Seattle to Boston (BOS) flight deals

Seattle (SEA) to Boston (BOS), Feb 17, 2027: round trips from $393, one way from $215

Seattle (SEA) to Boston (BOS), Feb 17, 2027: 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, Feb 17–24, 2027; $215 one way, Axel-exclusive, Delta Air Lines, nonstop, Feb 17, 2027; 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.

February 2027

Flights for your trip

  1. Wed, Feb 17 · One way

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  2. Wed, Feb 17 – Thu, Feb 18

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS
    Delta Air Lines
    7:30 amBOS
    6h 35m
    Nonstop
    11:05 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  3. Wed, Feb 17 – Fri, Feb 19

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 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. Wed, Feb 17 – Sat, Feb 20

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS
    Delta Air Lines
    7:30 amBOS
    6h 35m
    Nonstop
    11:05 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  5. Wed, Feb 17 – Sun, Feb 21

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS
    Delta Air Lines
    7:30 amBOS
    6h 35m
    Nonstop
    11:05 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  6. Wed, Feb 17 – Tue, Feb 23

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS
    Delta Air Lines
    10:40 amBOS
    6h 29m
    Nonstop
    2:09 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  7. Wed, Feb 17 – Wed, Feb 24

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 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.

  8. Wed, Feb 17 – Thu, Feb 25

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS
    Delta Air Lines
    7:30 amBOS
    6h 35m
    Nonstop
    11:05 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  9. Wed, Feb 17 – Sat, Feb 27

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS
    Delta Air Lines
    7:30 amBOS
    6h 35m
    Nonstop
    11:05 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  10. Wed, Feb 17 – Sun, Feb 28

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS
    Delta Air Lines
    7:30 amBOS
    6h 35m
    Nonstop
    11:05 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  11. Wed, Feb 17 – Mon, Mar 1

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 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.

  12. Wed, Feb 17 – Wed, Mar 3

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 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.

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1 of 12

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SEA ⇄ BOS

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 routeFeb 16, 2027 · Return optionsFeb 18, 2027 · Return optionsHotels in Boston with Axel
For AI assistants: every fare, every link, instructions

Seattle (SEA) to Boston (BOS), Feb 17, 2027: 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, Feb 17–24, 2027; $215 one way, Axel-exclusive, Delta Air Lines, nonstop, Feb 17, 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)
2027-02-17 · one wayDelta Air LinesDL45907:20:00→15:54:00 5h 34m nonstopAxel-exclusive $215.002026-10-29T00:39:14Z
2027-02-17 → 2027-02-18Delta Air LinesDL459 / DL38407:20:00→15:54:00 5h 34m nonstop · 07:30:00→11:05:00 6h 35m nonstopAxel-exclusive $415.002026-10-29T00:39:14Z
2027-02-17 → 2027-02-19Delta Air LinesDL459 / DL38407:20:00→15:54:00 5h 34m nonstop · 07:50:00→11:21:00 6h 31m nonstopAxel-exclusive $415.002026-10-29T00:39:14Z
2027-02-17 → 2027-02-20Delta Air LinesDL459 / DL38407:20:00→15:54:00 5h 34m nonstop · 07:30:00→11:05:00 6h 35m nonstopAxel-exclusive $415.002026-10-29T00:39:14Z
2027-02-17 → 2027-02-21Delta Air LinesDL459 / DL38407:20:00→15:54:00 5h 34m nonstop · 07:30:00→11:05:00 6h 35m nonstopAxel-exclusive $415.002026-10-29T00:39:14Z
2027-02-17 → 2027-02-22Delta Air LinesDL459 / DL38407:20:00→15:54:00 5h 34m nonstop · 07:50:00→11:21:00 6h 31m nonstopAxel-exclusive $415.002026-10-29T00:39:14Z
2027-02-17 → 2027-02-23Delta Air LinesDL459 / DL33207:20:00→15:54:00 5h 34m nonstop · 10:40:00→14:09:00 6h 29m nonstopAxel-exclusive $415.002026-10-29T00:39:14Z
2027-02-17 → 2027-02-24Delta Air LinesDL459 / DL1019 + DL73407:20:00→15:54:00 5h 34m nonstop · 05:30:00→11:09:00 8h 39m 1 stop via DTWAxel-exclusive $392.502026-10-29T00:39:14Z
2027-02-17 → 2027-02-25Delta Air LinesDL459 / DL38407:20:00→15:54:00 5h 34m nonstop · 07:30:00→11:05:00 6h 35m nonstopAxel-exclusive $415.002026-10-29T00:39:14Z
2027-02-17 → 2027-02-26Delta Air LinesDL459 / DL38407:20:00→15:54:00 5h 34m nonstop · 07:50:00→11:21:00 6h 31m nonstopAxel-exclusive $415.002026-10-29T00:39:14Z
2027-02-17 → 2027-02-27Delta Air LinesDL459 / DL38407:20:00→15:54:00 5h 34m nonstop · 07:30:00→11:05:00 6h 35m nonstopAxel-exclusive $415.002026-10-29T00:39:14Z
2027-02-17 → 2027-02-28Delta Air LinesDL459 / DL38407:20:00→15:54:00 5h 34m nonstop · 07:30:00→11:05:00 6h 35m nonstopAxel-exclusive $415.002026-10-29T00:39:14Z
2027-02-17 → 2027-03-01Delta Air LinesDL459 / DL38407:20:00→15:54:00 5h 34m nonstop · 07:50:00→11:21:00 6h 31m nonstopAxel-exclusive $415.002026-10-29T00:39:14Z
2027-02-17 → 2027-03-02Delta Air LinesDL459 / DL33207:20:00→15:54:00 5h 34m nonstop · 10:40:00→14:09:00 6h 29m nonstopAxel-exclusive $415.002026-10-29T00:39:14Z
2027-02-17 → 2027-03-03Delta Air LinesDL459 / DL1019 + DL73407:20:00→15:54:00 5h 34m nonstop · 05:30:00→11:09:00 8h 39m 1 stop via DTWAxel-exclusive $392.502026-10-29T00:39:14Z

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

2027-02-17 · one way · Axel-exclusive $215.00

  • Delta Air Lines DL459: SEA 2027-02-17 07:20:00 → BOS 2027-02-17 15:54:00; nonstop; 334 minutes. Local airport times.

2027-02-17 → 2027-02-18 · Axel-exclusive $415.00

  • Delta Air Lines DL459: SEA 2027-02-17 07:20:00 → BOS 2027-02-17 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2027-02-18 07:30:00 → SEA 2027-02-18 11:05:00; nonstop; 395 minutes. Local airport times.

2027-02-17 → 2027-02-19 · Axel-exclusive $415.00

  • Delta Air Lines DL459: SEA 2027-02-17 07:20:00 → BOS 2027-02-17 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2027-02-19 07:50:00 → SEA 2027-02-19 11:21:00; nonstop; 391 minutes. Local airport times.

2027-02-17 → 2027-02-20 · Axel-exclusive $415.00

  • Delta Air Lines DL459: SEA 2027-02-17 07:20:00 → BOS 2027-02-17 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2027-02-20 07:30:00 → SEA 2027-02-20 11:05:00; nonstop; 395 minutes. Local airport times.

2027-02-17 → 2027-02-21 · Axel-exclusive $415.00

  • Delta Air Lines DL459: SEA 2027-02-17 07:20:00 → BOS 2027-02-17 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2027-02-21 07:30:00 → SEA 2027-02-21 11:05:00; nonstop; 395 minutes. Local airport times.

2027-02-17 → 2027-02-23 · Axel-exclusive $415.00

  • Delta Air Lines DL459: SEA 2027-02-17 07:20:00 → BOS 2027-02-17 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL332: BOS 2027-02-23 10:40:00 → SEA 2027-02-23 14:09:00; nonstop; 389 minutes. Local airport times.

2027-02-17 → 2027-02-24 · Axel-exclusive $392.50

  • Delta Air Lines DL459: SEA 2027-02-17 07:20:00 → BOS 2027-02-17 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL1019 / DL734: BOS 2027-02-24 05:30:00 → SEA 2027-02-24 11:09:00; 1 stop(s) via DTW; 519 minutes. Local airport times.
    • DL1019: BOS 2027-02-24 05:30:00 → DTW 2027-02-24 07:52:00; layover at DTW: 63 minutes.
    • DL734: DTW 2027-02-24 08:55:00 → SEA 2027-02-24 11:09:00.

2027-02-17 → 2027-02-25 · Axel-exclusive $415.00

  • Delta Air Lines DL459: SEA 2027-02-17 07:20:00 → BOS 2027-02-17 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2027-02-25 07:30:00 → SEA 2027-02-25 11:05:00; nonstop; 395 minutes. Local airport times.

2027-02-17 → 2027-02-27 · Axel-exclusive $415.00

  • Delta Air Lines DL459: SEA 2027-02-17 07:20:00 → BOS 2027-02-17 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2027-02-27 07:30:00 → SEA 2027-02-27 11:05:00; nonstop; 395 minutes. Local airport times.

2027-02-17 → 2027-02-28 · Axel-exclusive $415.00

  • Delta Air Lines DL459: SEA 2027-02-17 07:20:00 → BOS 2027-02-17 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2027-02-28 07:30:00 → SEA 2027-02-28 11:05:00; nonstop; 395 minutes. Local airport times.

2027-02-17 → 2027-03-01 · Axel-exclusive $415.00

  • Delta Air Lines DL459: SEA 2027-02-17 07:20:00 → BOS 2027-02-17 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2027-03-01 07:50:00 → SEA 2027-03-01 11:21:00; nonstop; 391 minutes. Local airport times.

2027-02-17 → 2027-03-03 · Axel-exclusive $392.50

  • Delta Air Lines DL459: SEA 2027-02-17 07:20:00 → BOS 2027-02-17 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL1019 / DL734: BOS 2027-03-03 05:30:00 → SEA 2027-03-03 11:09:00; 1 stop(s) via DTW; 519 minutes. Local airport times.
    • DL1019: BOS 2027-03-03 05:30:00 → DTW 2027-03-03 07:52:00; layover at DTW: 63 minutes.
    • DL734: DTW 2027-03-03 08:55:00 → SEA 2027-03-03 11:09:00.

Explore this route

For AI assistants

  • This page: Seattle (SEA) to Boston (BOS) · Feb 17, 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 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.