Cheap Flights from Boston, MA to Seattle, WA from $119
On Cheapflightsplus.com you will find 15 direct and 433 connecting flights from Boston to Seattle. You can compare airfare deals from 7 airlines and multiple travel sites from $119, book and save on cheap plane tickets and last minute offers. Also check out BOS-SEA flight schedule to find best flight time, convenient departure and arrival airports.
Find One-Way and Round-Trip Boston to Seattle Flight Deals
september
: $ 119 (one-way), $ 204 (round-trip).Flight Information
Below we will explain in detail what the flights cost on the destination from Boston to Seattle depends on and how to choose the most interesting flight option for you.
Distance between Boston and Seattle is 4005 miles. Time difference between the cities is 3h. Airplanes depart 05:00 to 21:40 from 4 Boston airports and arrive 05:00 to 21:40 to 3 Seattle airports. Average flight time is 6h 11m.
- The fastest flight 6h 8m
- Average flight time 6h 11m
- Distance 2489 ml
Best Flights from Boston to Seattle Today
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The cheapest months to travel to Seattle are june (from 119 $), september (from 119 $), august (from 124 $).
The most expensive months are december (from 393 $), february (from 331 $), january (from 225 $).
What is the lowest airfare Boston to Seattle?
The cheapest plane ticket found by our users is $119. This airfare is for economy class on one-way HA4792 flight by Hawaiian Airlines for September 27, 2025 which leaves Logan in Boston at 16:00 am and arrives at Seattle Seattle-Tacoma Intl at 19:15.
Flight Schedule Boston (Massachusetts) to Seattle (Washington)
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Popular Airlines on the Route
The flight Boston — Seattle is served by 7 regular airlines and 3 low-cost airlines. Most of the flights on this route are operated by Alaska Airlines - 82 departures per week at the price of from $122. And the most expensive tickets are offered by Turkish Airlines airline - from $1778.
Direct flights
- AS - Alaska Airlinesfrom $122
- HA - Hawaiian Airlinesfrom $119
Connecting Flights
- AS - Alaska Airlinesfrom $132
- SY - Sun Country Airlinesfrom $173
- TK - Turkish Airlinesfrom $1778
- HA - Hawaiian Airlinesfrom $125
- UA - United Airlinesfrom $171
- NK - Spirit Airlinesfrom $146
- G4 - Allegiant Airfrom $213
Airports
You can fly from Boston to Seattle from 4 airports (Boston City Heliport, Boston RT128 Rail, Boston South Rail, Logan).
Boston airports
- Boston City Heliport-JBC
- Boston RT128 Rail-ZRU
- Boston South Rail-ZTO
- Logan-BOSfrom $119
Seattle airports
- Boeing Field International Airport-BFI
- Seattle-Tacoma Intl-SEA
- Kenmore Air Harbor SPB-LKE
Airplanes
There are flights to Seattle from Boston by 7 airlines that use 1 aircraft brands. They range from huge modern airplanes to small-sized.
- Boeing 737-100/200from $242
Top Domestic Destinations from Boston
You may also consider searching for discounted plane tickets to some other popular places from Boston within United States.
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Top International Destinations from Boston
Our state-of-the art metasearch will definitely provide you with the best airfare on international flights. We’re proud to partner with many reliable travel suppliers located outside the US what gives us an opportunity to offer the most competitive prices on far destinations.
- from $76
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How to book a plane ticket yourself?
- Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find Flights»
- Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
- Click «Buy» when you are ready — our system will redirect you to the site that sells the selected flight ticket.
- Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
- That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.
To find an airline ticket, please select dates.