Cheap flights from Boston to Seattle (BOS - SEA)

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The best prices from Boston Logan Intl to Seattle/Tacoma Intl are usually found in January or February, booked 56 days in advance, depart on a Friday or Saturday and return on a Tuesday

How to find the cheapest flight from
Boston (BOS) to Seattle (SEA)

All the information you need to plan the best BOS to SEA flight in 2022: compare Boston to Seattle flight prices with the expected peak season, weather and rainfall in Seattle.
BOS - SEA
Price
$237 - $410
SEA
Temperature
41 - 66.2 °F
SEA
Rainfall
0.7 - 6.6 inches

Popular in

December

High demand for flights, 29% potential price rise

Cheapest in

January

Best time to find cheap flights, 19% potential price drop

Round-trip from

$237

From Boston Logan Intl to Seattle/Tacoma Intl

One-way from

$208

One-way flight from Boston Logan Intl to Seattle/Tacoma Intl

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
When is the cheapest time to fly from Boston to Seattle (BOS - SEA)?

One of the essential ways to save on airfare from Boston to Seattle is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 40% on airfare.

What is the cheapest day to fly round-trip from Boston to Seattle?

Thursday is generally a great day to depart. Flying on this day could help you save up to 25%.

How far in advance should I book a flight from Boston to Seattle?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 54 days in advance, which can save you up to 73% on flights from Boston to Seattle compared to booking the week you need them. Waiting 54 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $376. For sooner than that we have options available in the next 3 days from $488.

Cheap flights from Boston to Seattle in May, June 2022

The best prices found for BOS to SEA flights for May, June
26 May - 6 Jun
$409pp
BOS
Boston Logan Intl
Multiple Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
American Airlines
 
1 STOP
BOS
Boston Logan Intl
26 May - 6 Jun
$418pp
BOS
Boston Logan Intl
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
American Airlines
 
1 STOP
BOS
Boston Logan Intl
2 Jun - 6 Jun
$451pp
BOS
Boston Logan Intl
Multiple Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
American Airlines
 
1 STOP
BOS
Boston Logan Intl

Boston Logan Intl to Seattle 2022 flight deals

Cheap flights to Seattle from Boston found for this year
13 Sep - 20 Sep
$218pp
BOS
Boston Logan Intl
Delta
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Delta
Non-Stop
BOS
Boston Logan Intl
13 Sep - 20 Sep
$225pp
BOS
Boston Logan Intl
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Delta
Non-Stop
BOS
Boston Logan Intl
14 Sep - 20 Sep
$227pp
BOS
Boston Logan Intl
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Delta
Non-Stop
BOS
Boston Logan Intl

Non-stop flights to Seattle from Boston

Save time with Boston to Seattle direct flight deals
13 Sep - 27 Sep
$218pp
BOS
Boston Logan Intl
Delta
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Delta
Non-Stop
BOS
Boston Logan Intl
30 Sep - 9 Oct
$243pp
BOS
Boston Logan Intl
JetBlue
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
JetBlue
Non-Stop
BOS
Boston Logan Intl
14 Sep - 20 Sep
$248pp
BOS
Boston Logan Intl
Multiple Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Delta
Non-Stop
BOS
Boston Logan Intl

Last minute flights from Boston to Seattle

Late deals on round-trip flights to Seattle from Boston, departing today and this week
2 Jun - 6 Jun
$451pp
BOS
Boston Logan Intl
Multiple Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
American Airlines
 
1 STOP
BOS
Boston Logan Intl
2 Jun - 6 Jun
$456pp
BOS
Boston Logan Intl
Multiple Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
BOS
Boston Logan Intl
2 Jun - 6 Jun
$466pp
BOS
Boston Logan Intl
Multiple Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
United Airlines
 
1 STOP
BOS
Boston Logan Intl

One-way flights to Seattle/Tacoma Intl from Boston

The cheapest one-way flights from Boston to Seattle
2:00 am - 10:03 am
Delta
1 Stop
11h 03m
BOS - SEA
Delta
$208
Delta
2:00 pm - 5:19 pm
American Airlines
Nonstop
6h 19m
BOS - SEA
American Airlines
7:30 am - 12:48 pm
Sun Country Air
1 Stop
8h 18m
BOS - SEA
Sun Country Air

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Boston</span> to <span class="emphasized">Seattle</span> flights.

Flight FAQs

From Boston to Seattle

What airports do I use to fly from Boston to Seattle?

You will need to book a flight from Boston Logan Intl to Seattle/Tacoma Intl if you want to fly from Boston to Seattle. At least 12 different airlines have flights from Logan Intl (BOS) to Seattle/Tacoma Intl (SEA) on a regular basis. There are 22 flights to Seattle from the Boston airport per day. If you manage to book one that is nonstop, then you can expect the flight time from BOS to SEA to be around 6h 13m.

Which airlines flying from Boston Logan Intl to Seattle/Tacoma Intl have flexible cancellations due to COVID-19?

Delta, Alaska Airlines, and JetBlue are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

Can I find flights from Boston to Seattle for under $300 on Cheapflights?

Yes, there are multiple flights from Boston to Seattle for under $300. The cheapest flight booked recently is on Delta for just $218, but on average you can expect to pay $246.

Are there nonstop flights from Boston to Seattle for under $300 on Cheapflights?

Cheapflights has at least 20 direct flights from Boston to Seattle under $300. A good price for a nonstop flight from Boston to Seattle is less than $295.

Are there last-minute flights available from Boston to Seattle for under $500?

There are currently 20+ open flights from Boston to Seattle within the next 7 days for less than $500.

What days are nonstop flights available from Boston to Seattle?

Nonstop flights can be found on the following days: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday.

How popular is this Boston to Seattle flight route?

Flights from Boston Logan Intl to Seattle/Tacoma Intl have been viewed 68 times in the past calendar month.

How many flights depart from Boston to Seattle on average per day?

14 flight departures from Boston to Seattle per day on average.
Morning (6am - Noon) - 64% of flight departures
Afternoon (Noon - 6pm) - 14% of flight departures
Evening (6pm - Midnight) - 21% of flight departures

How long is the flight from Boston to Seattle?

Departing from Boston to Seattle will take you 6h 19m. The distance between Boston and Seattle is about 2502 mi. Both multi-stop and nonstop flights can be found to your destination and back.

What are the cheapest airlines flying from Boston to Seattle round-trip?

According to our current data, Delta ($218), American Airlines ($240), and JetBlue ($243) offers the cheapest pricing from Boston to Seattle. These flights start at 25% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from Boston to Seattle one-way?

One-way options have recently been found by users for as low as $109 on Delta. Other airlines that offer cheap prices include American Airlines from $117 and JetBlue from $134 one-way.

What are the most reliable airlines from Boston to Seattle?

Consider Air France (94%), Korean Air (91%) or Japan Airlines (91%) when booking your flight. These represent the most reliable airlines when flying from Boston to Seattle.

What are the cheapest flights from Boston to Seattle?

On average you can expect to pay $1,032 for a flight from Boston to Seattle. The cheapest flight overall is $194 while the most popular route, (Boston Logan Intl - Seattle/Tacoma Intl) is currently priced at $218.

What are the most popular airlines that fly from Boston to Seattle?

Before booking your flight from Boston to Seattle check out the most popular airlines for this route: Major Airline, Endeavor Airlines or American Airlines.

COVID Restrictions

View COVID Travel Restrictions for Seattle, WA

Do I need a COVID test to fly to Seattle from Boston?

Information is based on travel restrictions for travel to Seattle/Tacoma Intl within the United States

Most visitors from Boston Logan Intl need to provide a negative COVID-19 test result and/or quarantine to enter Seattle/Tacoma Intl.

COVID-19 testing requirements
Visitors from Boston Logan Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Seattle/Tacoma Intl.

Quarantine requirements
Visitors from Boston Logan Intl are not required to quarantine after entering Seattle/Tacoma Intl.

Do I need a test to fly back to Boston from Seattle?

Returning to Boston Logan Intl from Seattle/Tacoma Intl

COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Boston Logan Intl.

Quarantine requirements
Visitors from Seattle/Tacoma Intl are not required to quarantine after entering Boston Logan Intl.

Hide COVID Travel Restrictions for Seattle, WA

Alternative routes for Boston to Seattle

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for Seattle

Things to know before you go - useful duration and weather info for your trip from Boston to Seattle.
Flight duration from BOS to SEA
5h 50m
Average temperature for May in Seattle
66.2 °F
Avg rainfall for May in Seattle
1.8 ″

Airports servicing Boston

Airports servicing Seattle

Top 10 airlines flying from Boston Logan Intl to Seattle/Tacoma Intl

The chart below displays the airlines Cheapflights users traveling from Boston to Seattle choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Juneyao Airlines
$10 $21 No cancel fee 66%

We couldn't confirm the COVID-19 safety measures taken by Juneyao Airlines. Please check directly on their website for additional information.

Spirit Airlines
$80 $238 No cancel fee 65%
United Airlines
$108 $274 No cancel fee 69%
Alaska Airlines
$109 $293 No cancel fee 75%
Frontier
$138 $268 No cancel fee 62%
Delta
$146 $357 No cancel fee N/A
JetBlue
$148 $402 No cancel fee 62%
American Airlines
$156 $453 No cancel fee 71%
Sun Country Air
$191 $428 No cancel fee 83%
Endeavor Airlines
$253 $506 No cancel fee N/A

We couldn't confirm the COVID-19 safety measures taken by Endeavor Airlines. Please check directly on their website for additional information.

Hourly flight availability from Boston to Seattle

See what time of day planes typically take off from Boston towards Seattle.
Afternoon Noon to 6 PM 83% of BOS to SEA departures
Morning 6 AM to noon 15% of BOS to SEA departures
Early morning Midnight to 6 AM 1% of BOS to SEA departures
Evening 6 PM to midnight 1% of BOS to SEA departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Boston to Seattle
See how many times per day planes take to the skies headed from Boston to Seattle.
Sunday
23 daily flights
Monday
24 daily flights
Tuesday
19 daily flights
Wednesday
21 daily flights
Thursday
19 daily flights
Friday
31 daily flights
Saturday
23 daily flights
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