Cheap flights from Boston to Seattle

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Easily compare round-trip flights from Boston to Seattle

Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Boston to Seattle by changing tabs
Quickest
Cheapest
Spirit Airlines
Spirit Airlines
06 Nov
BOS
3:27 pm
Boston Logan Intl airport
17h 52m
1 Stop
6:19 am
+1
SEA
Seattle/Tacoma Intl airport
Spirit Airlines
12 Nov
SEA
7:30 am
Seattle/Tacoma Intl airport
11h 52m
1 Stop
10:22 pm
BOS
Boston Logan Intl airport
143 USD
Spirit Airlines
Spirit Airlines
15 Nov
BOS
12:00 pm
Boston Logan Intl airport
9h 22m
1 Stop
6:22 pm
SEA
Seattle/Tacoma Intl airport
Spirit Airlines
11 Jan
SEA
9:20 am
Seattle/Tacoma Intl airport
9h 27m
1 Stop
9:47 pm
BOS
Boston Logan Intl airport
163 USD
Spirit Airlines
Spirit Airlines
05 Dec
BOS
12:00 pm
Boston Logan Intl airport
9h 44m
1 Stop
6:44 pm
SEA
Seattle/Tacoma Intl airport
Spirit Airlines
09 Dec
SEA
9:20 am
Seattle/Tacoma Intl airport
9h 19m
1 Stop
9:39 pm
BOS
Boston Logan Intl airport
163 USD
American Airlines
American Airlines
17 Jan
BOS
9:47 am
Boston Logan Intl airport
9h 37m
1 Stop
4:24 pm
SEA
Seattle/Tacoma Intl airport
American Airlines
19 Jan
SEA
8:45 am
Seattle/Tacoma Intl airport
5h 11m
4:56 pm
BOS
Boston Logan Intl airport
204 USD
Alaska Airlines
Alaska Airlines
06 Dec
BOS
1:45 pm
Boston Logan Intl airport
6h 35m
5:20 pm
SEA
Seattle/Tacoma Intl airport
Alaska Airlines
09 Dec
SEA
9:20 am
Seattle/Tacoma Intl airport
9h 19m
1 Stop
9:39 pm
BOS
Boston Logan Intl airport
173 USD
Major Airline
Major Airline
07 Jan
BOS
2:15 pm
Boston Logan Intl airport
6h 34m
5:49 pm
SEA
Seattle/Tacoma Intl airport
Major Airline
11 Jan
SEA
9:20 am
Seattle/Tacoma Intl airport
9h 27m
1 Stop
9:47 pm
BOS
Boston Logan Intl airport
166 USD

How to get the cheapest flight ticket from Boston to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Seattle?
January
The cheapest time of year to fly to Seattle from Boston is January. Most expensive is July
What is the cheapest day to fly to Seattle?
Wednesday
The cheapest day of the week is typically Wednesday. The most expensive is typically Monday
When is the cheapest time to fly to Seattle?
in the afternoon
Boston to Seattle flights are approximately 17% more expensive in the morning than in the afternoon
What is the cheapest airline that flies to Seattle?
Major Airline
Major Airline, Southwest, and Spirit Airlines are the most popular carriers operating from Boston to Seattle
What is the cheapest route?
Boston Logan Intl - Seattle/Tacoma Intl
Fly from Boston Logan Intl to Seattle/Tacoma Intl for the best Boston - Seattle flight prices
BOS
Boston Logan Intl
SEA
Seattle/Tacoma Intl
When is the cheapest time to book a flight to Seattle?
60 days before
The cheapest time to buy a flight from Boston to Seattle is approximately 60 days to departure
60
Days before departure
0

Flight information for Boston to Seattle (03A - BOS)

Find info about flight duration, direct flights, and airports for your flight from Boston to Seattle
Fastest flight time 6h 13m The fastest flight from Boston to Seattle takes 6h 13m.
Direct flights Every day Direct flights go from Boston to Seattle every day.
Airports in Seattle 3 airports There are 3 airports near Seattle: Seattle King County/Boeing (BFI), Seattle Lake Union Spb (LKE), Seattle/Tacoma Intl (SEA)

Alternative routes for Boston to Seattle

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Boston to Portland
Fastest flight time
6h 15m
Cheapest price
200 USD
Providence to Seattle
Fastest flight time
7h 55m
Cheapest price
254 USD
Providence to Portland
Fastest flight time
8h 16m
Cheapest price
268 USD

Flights from Boston to: