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Cheap flights from Seattle to Boston

55 nonstop flights a week, 8 of them today. Operated by 4 airlines, about 5h 24m in the air, 2,485 mi (4,000 km). Tickets from $285, nonstop from $296.

Flights from Seattle to Boston

Pick a departure date to see flights and seller prices

We search agencies and airlines for your day: nonstop and connecting flights, baggage, departure and arrival times.

Prices by day: Seattle to Boston

Lowest one-way price in dollars from recent searches, cheap days in green. Press a day to see flights and exact prices.

Filters

Best fares from Seattle to Boston

Lowest one-way prices found by recent searches for the next 120 days; press a card to search that date

Cheapest one-way $285 26 November 2026, with a connection Cheapest nonstop $296 17 November 2026, United Airlines Cheapest in the next 7 days $289 14 November, Sat Cheapest weekend departure $289 Sat, 14 November 2026 Cheapest month November 2026 tickets from $285

Seattle to Boston at a glance

flight time, from 5h 9m to 9h 40m
5h 24m
straight-line distance
2,485 mi (4,000 km)
flights a week
55
flights today
8
first and last departure
07:38 - 23:22
lowest price, with a connection, 26 November
$285
lowest nonstop price
$296
airlines
4

Seattle to Boston flight schedule

55 flights a week, 8 today, 25 seasonal or one-off. Departure and arrival times are local.

FlightDepartsArrivesDurationDaysAircraft
DL 459
Delta
07:38 Seattle-Tacoma International
16:00 Logan International, terminal A
5h 22m
Daily
Airbus A320
AS 279
Alaska Airlines
08:40 Seattle-Tacoma International
17:01 Logan International, terminal B
5h 21m
Mon, Fri, Sun
Boeing 737-800
AS 279
Alaska Airlines
08:47 Seattle-Tacoma International
17:17 Logan International, terminal B
5h 30m
Mon, Tue, Wed, Thu, Fri, Sun
Boeing 737-900
AS 279
Alaska Airlines
09:00 Seattle-Tacoma International
17:21 Logan International, terminal B
5h 21m
Sat
Boeing 737
UA 1372
United Airlines
09:05 Seattle-Tacoma International
21:24 Logan International, terminal B
9h 19m
Daily
Airbus A320
AS 279
Alaska Airlines
09:30 Seattle-Tacoma International
18:00 Logan International, terminal B
5h 30m
Sat
Boeing 737-800
DL 438
Delta
11:45 Seattle-Tacoma International
20:01 Logan International, terminal A
5h 16m
Mon, Tue, Wed, Thu, Fri, Sun
Airbus A320
DL 438
Delta
12:00 Seattle-Tacoma International
20:19 Logan International, terminal A
5h 19m
Fri
Airbus A320
DL 474
Delta
13:40 Seattle-Tacoma International
21:50 Logan International, terminal A
5h 10m
Mon, Sat, Sun
Airbus A320
AS 460
Alaska Airlines
15:36 Seattle-Tacoma International
23:58 Logan International, terminal B
5h 22m
Daily
Boeing 737-900
AS 460
Alaska Airlines
15:40 Seattle-Tacoma International
23:59 Logan International, terminal B
5h 19m
Mon, Fri, Sat, Sun
Boeing 737-900
DL 474
Delta
15:45 Seattle-Tacoma International
23:54 Logan International, terminal A
5h 9m
Mon, Tue, Wed, Thu, Fri, Sun
Airbus A320
AS 214
Alaska Airlines
21:20 Seattle-Tacoma International
05:40 Logan International, terminal B
5h 20m
Daily
Boeing 737-900
AS 214
Alaska Airlines
22:00 Seattle-Tacoma International
06:20 Logan International, terminal B
5h 20m
Thu
Boeing 737
DL 473
Delta
23:07 Seattle-Tacoma International
07:20 Logan International, terminal A
5h 13m
Daily
Airbus A320
AS 214
Alaska Airlines
23:22 Seattle-Tacoma International
07:40 Logan International, terminal B
5h 18m
Mon, Fri, Sat, Sun
Boeing 737-800

Seasonal and one-off flights

Not operating in the next two weeks. The first of them is on 1 December.

FlightDepartsArrivesDurationDaysAircraft
AS 214
Alaska Airlines
21:21 Seattle-Tacoma International
05:40 Logan International, terminal B
5h 19m
Seasonal
Boeing 737-900
DL 473
Delta
22:52 Seattle-Tacoma International
07:19 Logan International, terminal A
5h 27m
Seasonal
Airbus A320
AS 279
Alaska Airlines
08:41 Seattle-Tacoma International
17:06 Logan International, terminal B
5h 25m
Seasonal
Boeing 737-900
AS 1568
Alaska Airlines
15:35 Seattle-Tacoma International
23:59 Logan International, terminal B
5h 24m
Seasonal
Boeing 737-900
AS 214
Alaska Airlines
23:09 Seattle-Tacoma International
07:40 Logan International, terminal B
5h 31m
Seasonal
Boeing 737-900
DL 459
Delta
07:15 Seattle-Tacoma International
15:43 Logan International, terminal A
5h 28m
Seasonal
Airbus A320
DL 876
Delta
15:55 Seattle-Tacoma International
00:13 Logan International, terminal A
5h 18m
Seasonal
Airbus A320
DL 473
Delta
23:15 Seattle-Tacoma International
07:37 Logan International, terminal A
5h 22m
Seasonal
Airbus A320
DL 459
Delta
07:20 Seattle-Tacoma International
15:54 Logan International, terminal A
5h 34m
Seasonal
Airbus A320
DL 473
Delta
22:00 Seattle-Tacoma International
06:33 Logan International, terminal A
5h 33m
Seasonal
Airbus A320
AS 279
Alaska Airlines
09:05 Seattle-Tacoma International
17:25 Logan International, terminal B
5h 20m
Seasonal
Boeing 737-900
AS 460
Alaska Airlines
21:20 Seattle-Tacoma International
05:40 Logan International, terminal B
5h 20m
Seasonal
Boeing 737-900
AS 524
Alaska Airlines
08:21 Seattle-Tacoma International
16:46 Logan International, terminal B
5h 25m
Seasonal
Boeing 737-900
UA 1372
United Airlines
09:02 Seattle-Tacoma International
21:42 Logan International, terminal B
9h 40m
Seasonal
Airbus A320
UA 2416
United Airlines
13:16 Seattle-Tacoma International
01:05 Logan International, terminal B
8h 49m
Seasonal
Airbus A320
AS 1553
Alaska Airlines
15:35 Seattle-Tacoma International
23:59 Logan International, terminal B
5h 24m
Seasonal
Boeing 737-900
AS 536
Alaska Airlines
23:40 Seattle-Tacoma International
08:02 Logan International, terminal B
5h 22m
Seasonal
Boeing 737-900
DL 474
Delta
15:55 Seattle-Tacoma International
00:20 Logan International, terminal A
5h 25m
Seasonal
Airbus A320
UA 2416
United Airlines
13:12 Seattle-Tacoma International
01:05 Logan International, terminal B
8h 53m
Seasonal
Airbus A320
AS 1749
Alaska Airlines
10:20 Seattle-Tacoma International
18:45 Logan International, terminal B
5h 25m
Seasonal
Boeing 737-900
DL 438
Delta
11:50 Seattle-Tacoma International
20:24 Logan International, terminal A
5h 34m
Seasonal
Airbus A320
B6 398
jetBlue
11:35 Seattle-Tacoma International
20:14 Logan International, terminal C
5h 39m
Seasonal
Airbus A321
AS 462
Alaska Airlines
06:00 Seattle-Tacoma International
14:25 Logan International, terminal B
5h 25m
Seasonal
Boeing 737-900
B6 398
jetBlue
11:45 Seattle-Tacoma International
20:13 Logan International, terminal C
5h 28m
Seasonal
Airbus A321
B6 198
jetBlue
23:46 Seattle-Tacoma International
08:04 Logan International, terminal C
5h 18m
Seasonal
Airbus A320

Days of the week are taken from the schedule for the next 14 days; schedules change by season. Boston is 3 hours ahead of Seattle. The search shows seat availability and the price for your date.

Airlines flying Seattle to Boston

Flights a week by schedule and the cheapest nonstop fare of each airline found by recent searches

Delta27 a week Alaska Airlines21 a week United Airlines7 a week jetBluefrom 13 May

Airports

Where flights from Seattle to Boston depart and land

Departure from Seattle

Seattle-Tacoma International SEA

55 flights a week, 11 mi (18 km) from the city centre

About the airport

Arrival in Boston

Logan International BOS

55 flights a week, terminals A, B, C, 2 mi (3 km) from the city centre

About the airport

Frequently asked questions

How long is the flight from Seattle to Boston?
A nonstop flight takes 5 hours 24 minutes on average, from 5h 9m to 9h 40m depending on the flight.
How far is Boston from Seattle?
2,485 mi (4,000 km) in a straight line between the cities.
Which airlines fly nonstop from Seattle to Boston?
Delta (27 a week), Alaska Airlines (21 a week), United Airlines (7 a week) and jetBlue.
How many flights a day are there from Seattle to Boston?
8 flights today and 55 a week, about 7.9 a day on average.
When are the first and last flights from Seattle to Boston?
The first departure is at 07:38 (DL459), the last at 23:22 (AS214). Local time.
What is the cheapest upcoming date to fly from Seattle to Boston?
26 November 2026 (Thursday): from $285 one way, with a connection, by recent searches. The search shows the price for your dates.
Which airline is the cheapest from Seattle to Boston?
United Airlines: nonstop tickets from $296 on 17 November by recent searches. Prices change daily, so compare the sellers in the search.
What is the time difference between Seattle and Boston?
Boston is 3 hours ahead of Seattle. Schedule times on this page are local to each airport.
Which Seattle airport do flights to Boston leave from?
Seattle-Tacoma International (55 a week).