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
31 Jan
12:00 pm
BOS
Boston Logan Intl airport
9h 59m
1 Stop
SEA
6:59 pm
Seattle/Tacoma Intl airport
Spirit Airlines
02 Feb
9:20 am
SEA
Seattle/Tacoma Intl airport
9h 25m
1 Stop
BOS
9:45 pm
Boston Logan Intl airport
178 USD
Spirit Airlines
Spirit Airlines
26 Feb
11:51 am
BOS
Boston Logan Intl airport
9h 30m
1 Stop
SEA
6:21 pm
Seattle/Tacoma Intl airport
Spirit Airlines
02 Mar
9:20 am
SEA
Seattle/Tacoma Intl airport
9h 27m
1 Stop
BOS
9:47 pm
Boston Logan Intl airport
180 USD
JetBlue
JetBlue
30 Jan
2:00 am
BOS
Boston Logan Intl airport
6h 34m
SEA
5:34 am
Seattle/Tacoma Intl airport
JetBlue
02 Feb
9:20 am
SEA
Seattle/Tacoma Intl airport
9h 25m
1 Stop
BOS
9:45 pm
Boston Logan Intl airport
188 USD
Delta
Delta
19 Jan
1:40 am
BOS
Boston Logan Intl airport
6h 38m
SEA
5:18 am
Seattle/Tacoma Intl airport
Delta
22 Jan
8:45 am
SEA
Seattle/Tacoma Intl airport
5h 11m
BOS
4:56 pm
Boston Logan Intl airport
190 USD
Alaska Airlines
Alaska Airlines
11 Jan
2:00 am
BOS
Boston Logan Intl airport
6h 43m
SEA
5:43 am
Seattle/Tacoma Intl airport
Alaska Airlines
15 Jan
8:45 am
SEA
Seattle/Tacoma Intl airport
5h 11m
BOS
4:56 pm
Boston Logan Intl airport
197 USD
Delta
Delta
12 Jan
1:40 am
BOS
Boston Logan Intl airport
6h 41m
SEA
5:21 am
Seattle/Tacoma Intl airport
Delta
16 Jan
2:55 am
SEA
Seattle/Tacoma Intl airport
5h 20m
BOS
11:15 am
Boston Logan Intl airport
197 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 18% more expensive in the morning than in the afternoon
What is the cheapest airline that flies to Seattle?
Southwest
Southwest, Major Airline, 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 23m The fastest flight from Boston to Seattle takes 6h 23m.
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
Providence to Seattle
Fastest flight time
7h 37m
Cheapest price
213 USD
Boston to Portland
Fastest flight time
6h 11m
Cheapest price
214 USD
Providence to Portland
Fastest flight time
8h 39m
Cheapest price
293 USD

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