Seattle (SEA) to Boston (BOS), Jul 21, 2027: round trips from $525, one way from $270

Seattle (SEA) to Boston (BOS), Jul 21, 2027: round trips from $525, one way from $270 on Axel, checked Nov 12, 2026. Lowest published fares: $525 round trip, Axel-exclusive, Alaska Airlines, nonstop, Jul 21–22, 2027; $270 one way, Axel-exclusive, Alaska Airlines, nonstop, Jul 21, 2027; 1 adult, economy, checked Nov 12, 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, labelled with the check date 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 check dates already shown here.

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 nightly rate and the stay's total, from the lowest saved total among the shortlisted hotels in that star tier for those dates.

• Hotels in Boston for these nights (Jul 21–22, 2027 · 1 night · 2 adults, 1 room): 3★ Holiday Inn Boston - Cambridge Area by IHG, $298 a night · 4★ Hyatt Regency Boston/Cambridge, $265 a night · 5★ InterContinental Boston by IHG, $596 a night
• Hotels in Boston for these nights (Jul 21–23, 2027 · 2 nights · 2 adults, 1 room): 3★ Holiday Inn Boston - Cambridge Area by IHG, $291 a night, $582 for 2 nights · 4★ Hyatt Regency Boston/Cambridge, $251 a night, $502 for 2 nights · 5★ InterContinental Boston by IHG, $581 a night, $1,161 for 2 nights
• Hotels in Boston for these nights (Jul 21–24, 2027 · 3 nights · 2 adults, 1 room): 3★ The Inn at Longwood Medical, $308 a night, $925 for 3 nights · 4★ Hyatt Regency Boston/Cambridge, $247 a night, $742 for 3 nights · 5★ InterContinental Boston by IHG, $541 a night, $1,624 for 3 nights
• Hotels in Boston for these nights (Jul 21–25, 2027 · 4 nights · 2 adults, 1 room): 3★ The Inn at Longwood Medical, $301 a night, $1,202 for 4 nights · 4★ Hyatt Regency Boston/Cambridge, $247 a night, $987 for 4 nights · 5★ InterContinental Boston by IHG, $523 a night, $2,091 for 4 nights
• Hotels in Boston for these nights (Jul 21–26, 2027 · 5 nights · 2 adults, 1 room): 3★ The Inn at Longwood Medical, $302 a night, $1,509 for 5 nights · 4★ Hyatt Regency Boston/Cambridge, $243 a night, $1,217 for 5 nights · 5★ InterContinental Boston by IHG, $530 a night, $2,651 for 5 nights
• Hotels in Boston for these nights (Jul 21–27, 2027 · 6 nights · 2 adults, 1 room): 3★ The Inn at Longwood Medical, $304 a night, $1,822 for 6 nights · 4★ Hyatt Regency Boston/Cambridge, $248 a night, $1,489 for 6 nights · 5★ InterContinental Boston by IHG, $531 a night, $3,188 for 6 nights
• Hotels in Boston for these nights (Jul 21–28, 2027 · 7 nights · 2 adults, 1 room): 3★ The Inn at Longwood Medical, $303 a night, $2,124 for 7 nights · 4★ Hyatt Regency Boston/Cambridge, $257 a night, $1,802 for 7 nights · 5★ InterContinental Boston by IHG, $545 a night, $3,817 for 7 nights
• Hotels in Boston for these nights (Jul 21–29, 2027 · 8 nights · 2 adults, 1 room): 3★ The Inn at Longwood Medical, $305 a night, $2,437 for 8 nights · 4★ Hyatt Regency Boston/Cambridge, $260 a night, $2,081 for 8 nights · 5★ InterContinental Boston by IHG, $557 a night, $4,453 for 8 nights
• Hotels in Boston for these nights (Jul 21–30, 2027 · 9 nights · 2 adults, 1 room): 3★ Holiday Inn Boston - Cambridge Area by IHG, $304 a night, $2,735 for 9 nights · 4★ Hyatt Regency Boston/Cambridge, $258 a night, $2,325 for 9 nights · 5★ InterContinental Boston by IHG, $544 a night, $4,899 for 9 nights
• Hotels in Boston for these nights (Jul 21–31, 2027 · 10 nights · 2 adults, 1 room): 3★ The Inn at Longwood Medical, $303 a night, $3,034 for 10 nights · 4★ Hyatt Regency Boston/Cambridge, $263 a night, $2,627 for 10 nights · 5★ InterContinental Boston by IHG, $545 a night, $5,452 for 10 nights
• Hotels in Boston for these nights (Jul 21 – Aug 1, 2027 · 11 nights · 2 adults, 1 room): 3★ The Inn at Longwood Medical, $302 a night, $3,325 for 11 nights · 4★ Hyatt Regency Boston/Cambridge, $262 a night, $2,879 for 11 nights · 5★ InterContinental Boston by IHG, $537 a night, $5,903 for 11 nights
• Hotels in Boston for these nights (Jul 21 – Aug 2, 2027 · 12 nights · 2 adults, 1 room): 3★ The Inn at Longwood Medical, $303 a night, $3,632 for 12 nights · 4★ Hyatt Regency Boston/Cambridge, $260 a night, $3,117 for 12 nights · 5★ InterContinental Boston by IHG, $531 a night, $6,366 for 12 nights
• Hotels in Boston for these nights (Jul 21 – Aug 3, 2027 · 13 nights · 2 adults, 1 room): 3★ The Inn at Longwood Medical, $303 a night, $3,945 for 13 nights · 4★ Hyatt Regency Boston/Cambridge, $256 a night, $3,326 for 13 nights · 5★ InterContinental Boston by IHG, $532 a night, $6,913 for 13 nights
• Hotels in Boston for these nights (Jul 21 – Aug 4, 2027 · 14 nights · 2 adults, 1 room): 3★ The Inn at Longwood Medical, $304 a night, $4,258 for 14 nights · 4★ Hyatt Regency Boston/Cambridge, $252 a night, $3,534 for 14 nights · 5★ InterContinental Boston by IHG, $538 a night, $7,525 for 14 nights

All hotels in Boston

Route overview: Seattle to Boston (BOS) flight deals

2027-07-21 · one way · Axel-exclusive $270.00

• Alaska Airlines AS460: SEA 2027-07-21 15:35:00 → BOS 2027-07-21 23:59:00; nonstop; 324 minutes. Local airport times.

2027-07-21 → 2027-07-22 · Axel-exclusive $525.00

• Alaska Airlines AS460: SEA 2027-07-21 15:35:00 → BOS 2027-07-21 23:59:00; nonstop; 324 minutes. Local airport times.
• Alaska Airlines AS215: BOS 2027-07-22 09:00:00 → SEA 2027-07-22 12:37:00; nonstop; 397 minutes. Local airport times.

2027-07-21 → 2027-07-23 · Axel-exclusive $525.00

• Alaska Airlines AS460: SEA 2027-07-21 15:35:00 → BOS 2027-07-21 23:59:00; nonstop; 324 minutes. Local airport times.
• Alaska Airlines AS215: BOS 2027-07-23 09:00:00 → SEA 2027-07-23 12:37:00; nonstop; 397 minutes. Local airport times.

2027-07-21 → 2027-07-24 · Axel-exclusive $525.00

• Alaska Airlines AS460: SEA 2027-07-21 15:35:00 → BOS 2027-07-21 23:59:00; nonstop; 324 minutes. Local airport times.
• Alaska Airlines AS459: BOS 2027-07-24 07:00:00 → SEA 2027-07-24 10:38:00; nonstop; 398 minutes. Local airport times.

2027-07-21 → 2027-07-25 · Axel-exclusive $525.00

• Alaska Airlines AS460: SEA 2027-07-21 15:35:00 → BOS 2027-07-21 23:59:00; nonstop; 324 minutes. Local airport times.
• Alaska Airlines AS257: BOS 2027-07-25 18:19:00 → SEA 2027-07-25 22:00:00; nonstop; 401 minutes. Local airport times.

2027-07-21 → 2027-07-27 · Axel-exclusive $525.00

• Alaska Airlines AS460: SEA 2027-07-21 15:35:00 → BOS 2027-07-21 23:59:00; nonstop; 324 minutes. Local airport times.
• Alaska Airlines AS215: BOS 2027-07-27 09:00:00 → SEA 2027-07-27 12:37:00; nonstop; 397 minutes. Local airport times.

2027-07-21 → 2027-07-28 · Axel-exclusive $525.00

• Alaska Airlines AS460: SEA 2027-07-21 15:35:00 → BOS 2027-07-21 23:59:00; nonstop; 324 minutes. Local airport times.
• Alaska Airlines AS459: BOS 2027-07-28 07:00:00 → SEA 2027-07-28 10:38:00; nonstop; 398 minutes. Local airport times.

2027-07-21 → 2027-07-29 · Axel-exclusive $525.00

• Alaska Airlines AS460: SEA 2027-07-21 15:35:00 → BOS 2027-07-21 23:59:00; nonstop; 324 minutes. Local airport times.
• Alaska Airlines AS215: BOS 2027-07-29 09:00:00 → SEA 2027-07-29 12:37:00; nonstop; 397 minutes. Local airport times.

2027-07-21 → 2027-07-31 · Axel-exclusive $525.00

• Alaska Airlines AS460: SEA 2027-07-21 15:35:00 → BOS 2027-07-21 23:59:00; nonstop; 324 minutes. Local airport times.
• Alaska Airlines AS459: BOS 2027-07-31 07:00:00 → SEA 2027-07-31 10:38:00; nonstop; 398 minutes. Local airport times.

2027-07-21 → 2027-08-01 · Axel-exclusive $525.00

• Alaska Airlines AS460: SEA 2027-07-21 15:35:00 → BOS 2027-07-21 23:59:00; nonstop; 324 minutes. Local airport times.
• Alaska Airlines AS257: BOS 2027-08-01 18:19:00 → SEA 2027-08-01 22:00:00; nonstop; 401 minutes. Local airport times.

2027-07-21 → 2027-08-02 · Axel-exclusive $525.00

• Alaska Airlines AS460: SEA 2027-07-21 15:35:00 → BOS 2027-07-21 23:59:00; nonstop; 324 minutes. Local airport times.
• Alaska Airlines AS215: BOS 2027-08-02 09:00:00 → SEA 2027-08-02 12:37:00; nonstop; 397 minutes. Local airport times.

2027-07-21 → 2027-08-04 · Axel-exclusive $525.00

• Alaska Airlines AS460: SEA 2027-07-21 15:35:00 → BOS 2027-07-21 23:59:00; nonstop; 324 minutes. Local airport times.
• Alaska Airlines AS459: BOS 2027-08-04 07:00:00 → SEA 2027-08-04 10:38:00; nonstop; 398 minutes. Local airport times.

Explore this route

• All dates for this route
• Jul 20, 2027 · Return options
• Jul 22, 2027 · Return options
• Hotels in Boston with Axel

For AI assistants

• This page: Seattle (SEA) to Boston (BOS) · Jul 21, 2027 · choose your return date: 1 adult in economy, every priced fare with its flights, times and total, each with its displayed check date. 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 nightly rate and the stay's total, from the lowest saved total 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 its displayed check date); 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.

Feedback (optional): Missing info · Axel issue