Cheap flights from Boston to Seattle (BOS - SEA)

BOS — SEA
Feb 7 — Feb 142

The best prices from Boston Logan Intl to Seattle/Tacoma Intl are usually found in January or February, booked 29 days in advance, depart on a Wednesday or Thursday 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 2023: compare Boston to Seattle flight prices with the expected peak season, weather and rainfall in Seattle.

BOS - SEA

Price

$217 - $644

SEA

Temperature

41 - 66.2 °F

SEA

Rainfall

0.7 - 6.6 inches

Popular inJuneHigh demand for flights, 38% potential price rise
Cheapest inJanuaryBest time to find cheap flights, 45% potential price drop
Round-trip from$217From Boston Logan Intl to Seattle/Tacoma Intl
One-way from$106One-way flight from Boston Logan Intl to Seattle/Tacoma Intl

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

Tuesday is generally a great day to depart. Flying on this day could help you save up to 23%.

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 29 days in advance, which can save you up to 35% on flights from Boston to Seattle compared to booking the week you need them. Waiting 29 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 $437. For sooner than that we have options available in the next 3 days from $554.

What is the cheapest month to fly from Boston to Seattle?

January can be a great time to fly to Seattle from Boston with a flight ticket averaging about $396. Cheapflights users have found deals in the month of January for as cheap as $191. The most expensive prices can be found in the month of June.

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 33% on airfare.

Cheap flights from Boston to Seattle in February, March 2023

The best prices found for BOS to SEA flights for February, March
Feb 15 - Feb 28
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

Nonstop

6h 33m
SEA

Seattle/Tacoma Intl

BOS

Boston Logan Intl

Nonstop

5h 15m
$178

Alaska Airlines

Pick Dates

Deal found 2/1

Feb 15 - Feb 28
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

Nonstop

6h 33m
SEA

Seattle/Tacoma Intl

BOS

Boston Logan Intl

Nonstop

5h 15m
$186

Alaska Airlines

Pick Dates

Deal found 2/1

Feb 22 - Feb 28
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

Nonstop

6h 30m
SEA

Seattle/Tacoma Intl

BOS

Boston Logan Intl

Nonstop

5h 15m
$187

Alaska Airlines

Pick Dates

Deal found 2/1

Boston to Seattle 2023 flight deals

Cheap flights to Seattle from Boston found for this year
Feb 15 - Feb 28
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

Nonstop

6h 33m
SEA

Seattle/Tacoma Intl

BOS

Boston Logan Intl

Nonstop

5h 15m
$178

Alaska Airlines

Pick Dates

Deal found 2/1

Feb 15 - Feb 28
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

Nonstop

6h 33m
SEA

Seattle/Tacoma Intl

BOS

Boston Logan Intl

Nonstop

5h 15m
$186

Alaska Airlines

Pick Dates

Deal found 2/1

Feb 22 - Feb 28
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

Nonstop

6h 30m
SEA

Seattle/Tacoma Intl

BOS

Boston Logan Intl

Nonstop

5h 15m
$187

Alaska Airlines

Pick Dates

Deal found 2/1

Cheap Alaska Airlines flights from Boston to Seattle

Feb 15 - Feb 28
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

Nonstop

6h 33m
SEA

Seattle/Tacoma Intl

BOS

Boston Logan Intl

Nonstop

5h 15m
$178

Alaska Airlines

Pick Dates

Deal found 2/1

Mar 1 - Mar 8
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

Nonstop

6h 30m
SEA

Seattle/Tacoma Intl

BOS

Boston Logan Intl

Nonstop

5h 15m
$180

Alaska Airlines

Pick Dates

Deal found 1/30

Feb 15 - Feb 28
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

Nonstop

6h 33m
SEA

Seattle/Tacoma Intl

BOS

Boston Logan Intl

Nonstop

5h 15m
$186

Alaska Airlines

Pick Dates

Deal found 2/1

  • Alaska Airlines is one of the most popular airlines used for those traveling from Boston to Seattle. Flights on this route from Alaska Airlines typically cost $337.20 RT, a price that is 53% cheaper than the average Boston to Seattle flight. The cheapest flight found was $119 RT. Boston Logan Intl Airport is the most common Boston airport to take off from when flying to Seattle. Seattle/Tacoma Intl Airport is the most popular arrival airport in Seattle. When flying from Boston to Seattle, Alaska Airlines flights are 36% more popular than any other airline flying that same route.

Cheap American Airlines flights from Boston to Seattle

Mar 1 - Mar 6
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

1 stop

11h 59m
SEA

Seattle/Tacoma Intl

BOS

Boston Logan Intl

1 stop

10h 11m
$214

American Airlines

Pick Dates

Deal found 1/30

Mar 1 - Mar 8
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

1 stop

11h 59m
SEA

Seattle/Tacoma Intl

BOS

Boston Logan Intl

1 stop

8h 13m
$215

American Airlines

Pick Dates

Deal found 1/30

Mar 1 - Mar 7
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

1 stop

11h 59m
SEA

Seattle/Tacoma Intl

BOS

Boston Logan Intl

2 stops

11h 20m
$219

American Airlines

Pick Dates

Deal found 1/30

  • If you’re traveling from Boston to Seattle, one of the more common airlines traveling that route is American Airlines. Flights from American Airlines traveling this route typically cost $457.64 RT. This price is typically 47% more expensive than other airlines that offer Boston to Seattle flights. When booking this route, the cheapest RT price found was $149. The most popular departure airport in Boston when flying to Seattle is Boston Logan Intl Airport. The most popular airport to fly into when visiting Seattle is Seattle/Tacoma Intl Airport. When flying from Boston to Seattle, American Airlines flights are 34% more popular than any other airline flying that same route.

Non-stop flights to Seattle from Boston

Save time with Boston to Seattle direct flight deals
Feb 15 - Feb 28
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

Nonstop

6h 33m
SEA

Seattle/Tacoma Intl

BOS

Boston Logan Intl

Nonstop

5h 15m
$178

Alaska Airlines

Pick Dates

Deal found 2/1

Feb 15 - Feb 28
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

Nonstop

6h 33m
SEA

Seattle/Tacoma Intl

BOS

Boston Logan Intl

Nonstop

5h 15m
$186

Alaska Airlines

Pick Dates

Deal found 2/1

Feb 22 - Feb 28
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

Nonstop

6h 30m
SEA

Seattle/Tacoma Intl

BOS

Boston Logan Intl

Nonstop

5h 15m
$187

Alaska Airlines

Pick Dates

Deal found 2/1

Last minute flights from Boston to Seattle

Late deals on return flights to Seattle from Boston, departing today and this week
Feb 7 - Feb 15
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

Nonstop

6h 30m
SEA

Seattle/Tacoma Intl

BOS

Boston Logan Intl

Nonstop

5h 16m
$211

Alaska Airlines

Pick Dates

Deal found 1/31

Feb 7 - Feb 15
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

Nonstop

6h 30m
SEA

Seattle/Tacoma Intl

BOS

Boston Logan Intl

Nonstop

5h 16m
$212

Alaska Airlines

Pick Dates

Deal found 2/1

Feb 7 - Feb 17
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

Nonstop

6h 30m
SEA

Seattle/Tacoma Intl

BOS

Boston Logan Intl

Nonstop

5h 07m
$213

Multiple Airlines

Pick Dates

Deal found 1/30

One-way flights to Seattle from Boston

The cheapest one-way flights from Boston to Seattle
Mar 7
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

2 stops

30h 38m
$92

Multiple Airlines

Pick Dates

Deal found 1/30

Mar 1
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

2 stops

23h 03m
$94

Spirit Airlines

Pick Dates

Deal found 1/31

Mar 8
BOS

Boston Logan Intl

SEA

Seattle/Tacoma Intl

Nonstop

6h 30m
$96

Undisclosed Carrier

Pick Dates

Deal found 1/30

Reviews of Airlines Servicing Seattle

Alaska Airlines
8.0
Very good
1,360 reviews

Overall

8.0

Food

7.2

Boarding

8.2

Entertainment

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 10

No in flight entertainment and had to preorder and pay for food on a six and a half hour flight!

Alaska Airlines
8.0
Very good
1,360 reviews
Alaska Airlines
8.0
Very good
1,360 reviews

Overall

8.0

Food

7.2

Boarding

8.2

Entertainment

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 10

No in flight entertainment and had to preorder and pay for food on a six and a half hour flight!

Delta
7.9
Good
2,039 reviews
Alaska Airlines
8.0
Very good
1,360 reviews

Overall

8.0

Food

7.2

Boarding

8.2

Entertainment

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 10

No in flight entertainment and had to preorder and pay for food on a six and a half hour flight!

JetBlue
7.7
Good
376 reviews
Alaska Airlines
8.0
Very good
1,360 reviews

Overall

8.0

Food

7.2

Boarding

8.2

Entertainment

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 10

No in flight entertainment and had to preorder and pay for food on a six and a half hour flight!

United Airlines
7.6
Good
1,185 reviews
Alaska Airlines
8.0
Very good
1,360 reviews

Overall

8.0

Food

7.2

Boarding

8.2

Entertainment

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 10

No in flight entertainment and had to preorder and pay for food on a six and a half hour flight!

American Airlines
7.4
Good
1,668 reviews
Alaska Airlines
8.0
Very good
1,360 reviews

Overall

8.0

Food

7.2

Boarding

8.2

Entertainment

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 10

No in flight entertainment and had to preorder and pay for food on a six and a half hour flight!

Related info for your journey

Useful info, stats and facts about Boston to Seattle flights.

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 13 different airlines have flights from Logan Intl (BOS) to Seattle/Tacoma Intl (SEA) on a regular basis. There are 19 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 17m.

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 $200 on Cheapflights?

Yes, there are multiple flights from Boston to Seattle for under $200. The cheapest flight booked recently is on Alaska Airlines for just $178, but on average you can expect to pay $198.

Are there nonstop flights from Boston to Seattle for under $200 on Cheapflights?

Cheapflights has at least 20 direct flights from Boston to Seattle under $200. A good price for a nonstop flight from Boston to Seattle is less than $206.

Are there last-minute flights available from Boston to Seattle for under $300?

There are currently 20+ open flights from Boston to Seattle within the next 7 days for less than $300.

What days are nonstop flights available from Boston to Seattle?

Nonstop flights can be found on the following days: Sunday, Monday, Thursday, Saturday.

How popular is this Boston to Seattle flight route?

Flights from Boston Logan Intl to Seattle/Tacoma Intl have been viewed 168 times in the past calendar month.

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

9 flight departures from Boston to Seattle per day on average.
Morning (6am - Noon) - 89% of flight departures
Evening (6pm - Midnight) - 11% of flight departures

How long is the flight from Boston to Seattle?

Departing from Boston to Seattle will take you 6h 30m. The distance between Boston and Seattle is about 2502 mi. Generally, flights for this route are nonstop.

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

According to our current data, Alaska Airlines ($178), Undisclosed Carrier ($195), and JetBlue ($208) offers the cheapest pricing from Boston to Seattle. These flights start at 55% 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 $94 on Spirit Airlines. Other airlines that offer cheap prices include Undisclosed Carrier from $96 and Alaska Airlines from $99 one-way.

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: Undisclosed Carrier, Endeavor Airlines or American Airlines.

What are the most reliable airlines from Boston to Seattle?

Consider EL AL (100%), Japan Airlines (88%) or Air Tahiti Nui (86%) 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 $1,044 for a flight from Boston to Seattle. The cheapest flight overall is $99 while the most popular route, (Boston Logan Intl - Seattle/Tacoma Intl) is currently priced at $197.

Alternative routes for Boston to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Boston to Spokanefrom $318 pp
Boston to Pascofrom $318 pp
Boston to Pullmanfrom $922 pp
Boston to Walla Wallafrom $1,107 pp

Top 10 airlines flying from Boston to Seattle

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.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
Juneyao AirlinesCheapest$12Average$22FlexibilityNo cancel feeOn-time66%COVID-19 safety
Search Juneyao Airlines flights
United AirlinesCheapest$113Average$456FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search United Airlines flights
Alaska AirlinesCheapest$119Average$337FlexibilityNo cancel feeOn-time75%COVID-19 safety
Search Alaska Airlines flights
JetBlueCheapest$124Average$390FlexibilityNo cancel feeOn-time62%COVID-19 safety
Search JetBlue flights
FrontierCheapest$138Average$268FlexibilityNo cancel feeOn-time62%COVID-19 safety
Search Frontier flights
DeltaCheapest$149Average$458FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights
American AirlinesCheapest$178Average$473FlexibilityNo cancel feeOn-time71%COVID-19 safety
Search American Airlines flights
Sun Country AirCheapest$207Average$435FlexibilityNo cancel feeOn-time83%COVID-19 safety
Search Sun Country Air flights
Endeavor AirlinesCheapest$253Average$506FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Endeavor Airlines flights
Spirit AirlinesCheapest$274Average$661FlexibilityNo cancel feeOn-time65%COVID-19 safety
Search Spirit Airlines flights

Hourly flight availability from Boston to Seattle

See what time of day planes typically take off from Boston to Seattle
1%of flight departuresEarly morningMidnight to 6 am
42%of flight departuresMorning6 am to noon
35%of flight departuresAfternoonNoon to 6 pm
22%of flight departuresEvening6 pm to midnight
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
Sunday20daily flights
Monday22daily flights
Tuesday20daily flights
Wednesday20daily flights
Thursday17daily flights
Friday20daily flights
Saturday19daily flights
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