Cheap flights from Seattle to Boston (SEA–BOS)
SEASeattle–Tacoma International Airport
United States
United States
BOSBoston Logan International Airport
United States
United States
Alaska Airlines, Delta Air Lines and JetBlue Airways fly Seattle to Boston (SEA–BOS) nonstop and back, a great-circle distance of 4,010 km (2,490 mi).
- From
- SEA
- Seattle
- To
- BOS
- Boston
- Nonstop
- Yes · 3 airlines
- Airlines
- AS · DL · B6
- Cheapest fare found
- $169 one-way
- Distance
- 4,010 km (2,490 mi)
- Time difference
- Boston 3 hours ahead
- Most flights
- Alaska Airlines
- Time in the air
- 4h 38m · 5h 39m back
- On time (Touchdown Index)
- 71.5%
- Flights a week
- AS ~21 · DL ~16 · B6 ~5
- Aircraft seen
- Airbus A321neo · Boeing 737 Max 9 · Boeing 737-900
Network data imported from airport and airline sources:· How we verify
Seattle to Boston fares by month
Cheapest one-way fare found: $169 for October 2026 on JetBlue Airways, nonstop. Nonstop from $169.
- Oct ’26$169
- Nov ’26$198
- Dec ’26$232
- Jan ’27$231
- Feb ’27$222
- Mar ’27$236
- May ’27$236
- Jul ’27$235
Cheapest one-way fares per month of departure in the Aviasales price cache, found . Fares change by the hour: the live fare is shown when you search.
When to fly SEA–BOS
For Seattle–Tacoma (SEA) to Boston Logan (BOS), October 2026 had the lowest fare found ($169). Set your watch 3 hours forward on landing at BOS.
Seattle to Boston: frequently asked questions
Fares: Aviasales price cache, 8 October 2026; tracked flights between 6 September and 3 October 2026, from public ADS-B data.
How much is a flight from Seattle–Tacoma (SEA) to Boston Logan (BOS)?
From $169 one-way, the cheapest fare found for October 2026 on JetBlue Airways, nonstop; nonstop from $169 (found 8 October 2026).
How long is the SEA–BOS flight?
4h 38m wheels-up to wheels-down, the median of 177 tracked flights; BOS–SEA took 5h 39m.
Which airlines fly SEA–BOS direct?
Alaska Airlines, Delta Air Lines and JetBlue Airways.
What is the cheapest month to fly SEA–BOS?
October 2026, at $169; the dearest month found was $236.
What is the time difference between Seattle and Boston?
Boston is 3 hours ahead of Seattle: a SEA departure at noon is 15:00 local time in BOS.
Is SEA–BOS usually on time?
71.5% of 323 SEA–BOS flights landed within 15 minutes of their usual time; 5.3% were over an hour late.
How many SEA–BOS flights a week?
Alaska Airlines 21, Delta Air Lines 16 and JetBlue Airways 5 each way.
What aircraft fly SEA–BOS?
Airbus A321neo, Boeing 737 Max 9 and Boeing 737-900.
Boston to Seattle: the return flight (BOS–SEA)
All 3 airlines also fly BOS–SEA nonstop.
The return takes 5h 39m in the air (median of 155 tracked flights), 61 minutes longer than SEA–BOS.
Airlines flying SEA–BOS nonstop
| Airline | Usually takes off (SEA time) | Type | Alliance | Notes |
|---|---|---|---|---|
 Alaska Airlines AS | 07:58–23:34 | full-service | oneworld | — |
 Delta Air Lines DL | 07:46–23:39 | full-service | SkyTeam | — |
 JetBlue Airways B6 | 00:03–23:56 | low-cost | — | Seasonal |
One-stop alternatives to flying SEA–BOS nonstop
One airline on both legs; check it's sold as one ticket.
- Via Toronto (YYZ) with
Air Canada: 4,020 km (2,500 mi) flown, almost no further than nonstop. - Via Minneapolis (MSP) with Delta Air Lines and Sun Country Airlines: 4,050 km (2,520 mi) flown, 1% further than nonstop.
- Via Calgary (YYC) with
WestJet: 4,090 km (2,540 mi) flown, 2% further than nonstop. - Via Detroit (DTW) with Delta Air Lines: 4,110 km (2,550 mi) flown, 3% further than nonstop.
- Via Chicago (ORD) with
American Airlines, Delta Air Lines and United Airlines: 4,150 km (2,580 mi) flown, 4% further than nonstop.
SEA–BOS route map
More from Seattle and Boston
Other arrivals in United States
Also nonstop from SEA, nearest to BOS first (straight-line distance):
- SEA–JFK: New York · 300 km (186 mi) from BOS
- Newark (EWR) airport guide · 322 km (200 mi) from BOS
- Philadelphia (PHL) airport guide · 450 km (279 mi) from BOS
- Baltimore (BWI) airport guide · 594 km (369 mi) from BOS
- Washington (DCA) airport guide · 641 km (398 mi) from BOS
Explore the airlines’ route maps
- Alaska Airlines route map and destinations
- Delta Air Lines route map and destinations
- JetBlue Airways route map and destinations
Plan your arrival at Boston Logan International Airport (BOS)
Departure
Seattle–Tacoma International Airport
Seattle–Tacoma (SEA), Seattle. In our data, 38 airlines fly nonstop from SEA to 136 destinations.
View SEA airport guide →Arrival
Boston Logan International Airport
3 ways into Boston, fastest from 15 min:
- Silver Line SL1 20–35 min
- Shuttle + Blue Line 20–30 min
- Taxi or water taxi 15–40 min
Onward from Boston
Places you can't fly to nonstop from SEA, but can from BOS — for a stopover or a second leg.
Related routes
Sources
- en.wikipedia.org — airlines and destinations, checked 2026-10-01
- en.wikipedia.org — airlines and destinations, checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
Flight tracking: adsb.lol community ADS-B data (CC0), 6 September – 3 October 2026. Times are median wheels-up to wheels-down; add taxiing for gate-to-gate.
Report a change — seen something different at the airport or on the airline's site? We re-check and log corrections publicly.