$154+ Cheap flights from Boston to Seattle (BOS - SEA)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SEA
Jun 2 — Jun 91
Round-trip
1 adult, Economy
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Find cheap flights from Boston to Seattle with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Boston Logan Intl to Seattle/Tacoma Intl are usually found in September or October, booked 59 days in advance, depart on a Wednesday or Friday and return on a Wednesday
Cheap flight deals from Boston to Seattle
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Best
Last-minute
One-way
Cheapest flights from Boston to SeattleExplore the most affordable flight options available from Boston to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 3, 2026.
Explore the most affordable flight options available from Boston to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 3, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:00 am
BOS
- SEA
Nonstop6h 17m
JetBlue
Wed 6/1011:35 am
SEA
- BOS
Nonstop5h 37m
JetBlue
Deal found 4/30![JetBlue logo]()
$282
This Super.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:00 am
BOS
- SEA
Nonstop6h 17m
JetBlue
Wed 5/2711:35 am
SEA
- BOS
Nonstop5h 39m
JetBlue
Deal found 5/2![JetBlue logo]()
$283
This JetBlue deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:00 am
BOS
- SEA
Nonstop6h 17m
JetBlue
Wed 6/311:35 am
SEA
- BOS
Nonstop5h 39m
JetBlue
Deal found 4/29![JetBlue logo]()
$287
This lol.travel deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:00 am
BOS
- SEA
Nonstop6h 17m
JetBlue
Sat 6/611:35 am
SEA
- BOS
Nonstop5h 37m
JetBlue
Deal found 5/3![JetBlue logo]()
$290
This Expedia deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/27:11 pm
BOS
- SEA
Nonstop6h 16m
Multiple Airlines
Sat 6/611:35 am
SEA
- BOS
Nonstop5h 37m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$291
This JetBlue deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/27:00 am
BOS
- SEA
Nonstop6h 17m
JetBlue
Tue 7/2811:44 pm
SEA
- BOS
Nonstop5h 16m
JetBlue
Deal found 5/2![JetBlue logo]()
$292
This Super.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:00 am
BOS
- SEA
Nonstop6h 17m
JetBlue
Fri 5/2911:35 am
SEA
- BOS
Nonstop5h 39m
JetBlue
Deal found 5/2![JetBlue logo]()
$293
This Alaska Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:11 pm
BOS
- SEA
Nonstop6h 16m
Alaska Airlines
Sat 5/303:30 pm
SEA
- BOS
Nonstop5h 29m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$297
This Delta deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/235:20 pm
BOS
- SEA
Nonstop6h 13m
Delta
Sat 5/307:15 am
SEA
- BOS
Nonstop5h 40m
Delta
Deal found 5/1![Delta logo]()
$298
This JetBlue deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:00 am
BOS
- SEA
Nonstop6h 17m
JetBlue
Wed 6/311:35 am
SEA
- BOS
Nonstop5h 39m
JetBlue
Deal found 5/2![JetBlue logo]()
$299
This Alaska Airlines deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:00 am
BOS
- SEA
1 stop10h 14m
Alaska Airlines
Tue 6/23:30 pm
SEA
- BOS
Nonstop5h 29m
Alaska Airlines
Deal found 5/2![Alaska Airlines logo]()
$301
This Alaska Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:11 pm
BOS
- SEA
Nonstop6h 16m
Alaska Airlines
Tue 6/23:02 pm
SEA
- BOS
1 stop11h 42m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$302
Best flights from Boston to SeattleDiscover carefully curated flight deals from Boston to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 3, 2026.
Discover carefully curated flight deals from Boston to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 3, 2026.
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/257:48 am
BOS
- SEA
Nonstop6h 07m
Delta
Tue 5/2611:00 pm
SEA
- BOS
Nonstop5h 35m
Delta
Deal found 4/29![Delta logo]()
$357
This Alaska Airlines deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/16:40 pm
BOS
- SEA
1 stop18h 45m
Alaska Airlines
Wed 6/33:30 pm
SEA
- BOS
Nonstop5h 29m
Alaska Airlines
Deal found 5/1![Alaska Airlines logo]()
$362
This Southwest deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/192:45 pm
BOS
- SEA
2 stops11h 40m
Southwest
Sun 8/2311:00 pm
SEA
- BOS
1 stop11h 35m
Southwest
Deal found 4/29![Southwest logo]()
$363
This JetBlue deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/227:24 pm
BOS
- SEA
Nonstop6h 25m
JetBlue
Fri 7/311:44 pm
SEA
- BOS
Nonstop5h 16m
JetBlue
Deal found 4/28![JetBlue logo]()
$367
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/29:34 am
BOS
- SEA
2 stops12h 25m
United Airlines
Fri 9/116:00 pm
SEA
- BOS
1 stop8h 59m
United Airlines
Deal found 4/29![United Airlines logo]()
$412
This Delta deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/17:48 am
BOS
- SEA
Nonstop6h 05m
Delta
Mon 6/111:00 pm
SEA
- BOS
Nonstop5h 33m
Delta
Deal found 5/2![Delta logo]()
$367
This Southwest deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:25 am
BOS
- SEA
2 stops11h 10m
Southwest
Tue 10/135:20 am
SEA
- BOS
2 stops10h 40m
Southwest
Deal found 4/28![Southwest logo]()
$397
This Alaska Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/39:30 am
BOS
- SEA
1 stop8h 25m
Alaska Airlines
Mon 9/77:30 am
SEA
- BOS
1 stop19h 19m
Alaska Airlines
Deal found 4/30![Alaska Airlines logo]()
$412
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/167:45 am
BOS
- SEA
Nonstop6h 16m
Delta
Mon 6/2911:15 pm
SEA
- BOS
Nonstop5h 20m
Delta
Deal found 4/28![Delta logo]()
$377
This Southwest deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:00 am
BOS
- SEA
1 stop15h 00m
Southwest
Sun 8/2311:00 pm
SEA
- BOS
2 stops10h 30m
Southwest
Deal found 5/1![Southwest logo]()
$398
This Delta deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/147:25 pm
BOS
- SEA
Nonstop6h 24m
Delta
Tue 6/164:00 pm
SEA
- BOS
Nonstop5h 21m
Delta
Deal found 5/3![Delta logo]()
$387
This Southwest deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/254:45 pm
BOS
- SEA
2 stops11h 25m
Southwest
Fri 7/316:05 pm
SEA
- BOS
2 stops11h 00m
Southwest
Deal found 5/2![Southwest logo]()
$402
Last-minute flights from Boston to SeattleDiscover last-minute flight deals from Boston to Seattle. Data last updated May 3, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Seattle. Data last updated May 3, 2026 and is based on user searches.
This Kissandfly.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/237:11 pm
BOS
- SEA
Nonstop6h 16m
Alaska Airlines
Sat 5/305:15 am
SEA
- BOS
1 stop9h 50m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$292
This Delta deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/235:20 pm
BOS
- SEA
Nonstop6h 13m
Delta
Sat 5/307:15 am
SEA
- BOS
Nonstop5h 40m
Delta
Deal found 5/1![Delta logo]()
$298
This flugladen.de deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/237:00 am
BOS
- SEA
Nonstop6h 17m
Multiple Airlines
Sat 5/303:30 pm
SEA
- BOS
Nonstop5h 29m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$306
This Super.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:00 am
BOS
- SEA
Nonstop6h 17m
JetBlue
Wed 5/2711:35 am
SEA
- BOS
Nonstop5h 39m
JetBlue
Deal found 5/2![JetBlue logo]()
$283
This JetBlue deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:00 am
BOS
- SEA
Nonstop6h 17m
JetBlue
Wed 6/311:35 am
SEA
- BOS
Nonstop5h 39m
JetBlue
Deal found 4/29![JetBlue logo]()
$287
This Super.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:00 am
BOS
- SEA
Nonstop6h 17m
JetBlue
Fri 5/2911:35 am
SEA
- BOS
Nonstop5h 39m
JetBlue
Deal found 5/2![JetBlue logo]()
$293
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:48 am
BOS
- SEA
Nonstop6h 07m
Delta
Tue 6/2311:15 pm
SEA
- BOS
Nonstop5h 20m
Delta
Deal found 4/28![Delta logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:11 pm
BOS
- SEA
Nonstop6h 16m
Alaska Airlines
Wed 6/33:02 pm
SEA
- BOS
1 stop11h 42m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$302
This Expedia deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:00 am
BOS
- SEA
Nonstop6h 17m
Multiple Airlines
Sat 5/307:26 am
SEA
- BOS
1 stop19h 18m
Multiple Airlines
Deal found 5/2![Multiple Airlines logo]()
$303
This Cheapflightsfares deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:00 am
BOS
- SEA
Nonstop6h 17m
JetBlue
Wed 6/311:35 am
SEA
- BOS
Nonstop5h 39m
JetBlue
Deal found 4/30![JetBlue logo]()
$282
This lol.travel deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:00 am
BOS
- SEA
Nonstop6h 17m
JetBlue
Sat 6/611:35 am
SEA
- BOS
Nonstop5h 37m
JetBlue
Deal found 5/3![JetBlue logo]()
$290
This JetBlue deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:00 am
BOS
- SEA
Nonstop6h 17m
JetBlue
Wed 6/311:35 am
SEA
- BOS
Nonstop5h 39m
JetBlue
Deal found 5/2![JetBlue logo]()
$299
One-way flights from Boston to SeattleSearch for one-way flight options from Boston to Seattle. Find affordable one-way fares based on user searches. Data last updated May 3, 2026.
Search for one-way flight options from Boston to Seattle. Find affordable one-way fares based on user searches. Data last updated May 3, 2026.
This American Airlines deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/103:06 pm
BOS
- SEA
1 stop10h 52m
American Airlines
Deal found 5/1![American Airlines logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2712:01 pm
BOS
- SEA
2 stops25h 05m
Frontier
Deal found 4/29![Frontier logo]()
$156
This American Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:52 pm
BOS
- SEA
1 stop8h 44m
American Airlines
Deal found 4/28![American Airlines logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/189:12 am
BOS
- SEA
2 stops28h 23m
Frontier
Deal found 4/30![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:00 am
BOS
- SEA
2 stops30h 49m
Frontier
Deal found 4/28![Frontier logo]()
$163
This Southwest deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/192:45 pm
BOS
- SEA
2 stops11h 40m
Southwest
Deal found 4/29![Southwest logo]()
$164
This Jettzy deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/247:00 am
BOS
- SEA
Nonstop6h 17m
JetBlue
Deal found 4/30![JetBlue logo]()
$165
This Super.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/17:00 am
BOS
- SEA
Nonstop6h 17m
JetBlue
Deal found 5/1![JetBlue logo]()
$167
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/15:04 pm
BOS
- SEA
1 stop8h 54m
American Airlines
Deal found 4/29![American Airlines logo]()
$168
This American Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/205:44 pm
BOS
- SEA
1 stop8h 37m
American Airlines
Deal found 4/30![American Airlines logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/106:00 am
BOS
- SEA
2 stops31h 35m
Frontier
Deal found 4/30![Frontier logo]()
$170
This American Airlines deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/303:06 pm
BOS
- SEA
1 stop10h 52m
American Airlines
Deal found 5/2![American Airlines logo]()
$174
Find flight deals from Boston to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $282 (Cheapflightsfares) |
One-way from | $154 (American Airlines) |
Popular in | December |
Cheapest in | September |
Average price | $343 |
Good round-trip deal | $401 or less |
Good one-way deal | $213 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Boston to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 3, 2026.
Use the filters below to find and compare flights from Boston to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Mon 5/25
7:48 am-10:55 am
Nonstop6h 07m
Seattle/Tacoma Intl
Tue 5/26
11:00 pm-7:35 am
Nonstop5h 35m
$357
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Mon 6/1
6:40 pm-10:25 am
1 stop18h 45m
Seattle/Tacoma Intl
Wed 6/3
3:30 pm-11:59 pm
Nonstop5h 29m
$362
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Wed 8/19
2:45 pm-11:25 pm
2 stops11h 40m
Seattle/Tacoma Intl
Sun 8/23
11:00 pm-1:35 pm
1 stop11h 35m
$363
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Mon 6/22
7:24 pm-10:49 pm
Nonstop6h 25m
Seattle/Tacoma Intl
Fri 7/3
11:44 pm-8:00 am
Nonstop5h 16m
$367
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Mon 6/1
7:48 am-10:53 am
Nonstop6h 05m
Seattle/Tacoma Intl
Mon 6/1
11:00 pm-7:33 am
Nonstop5h 33m
$367
Quickest round-trip
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Tue 6/16
7:45 am-11:01 am
Nonstop6h 16m
Seattle/Tacoma Intl
Mon 6/29
11:15 pm-7:35 am
Nonstop5h 20m
$377
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Sun 6/14
7:25 pm-10:49 pm
Nonstop6h 24m
Seattle/Tacoma Intl
Tue 6/16
4:00 pm-12:21 am
Nonstop5h 21m
$387
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Thu 10/1
5:25 am-1:35 pm
2 stops11h 10m
Seattle/Tacoma Intl
Tue 10/13
5:20 am-7:00 pm
2 stops10h 40m
$397
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Sat 8/15
5:00 am-5:00 pm
1 stop15h 00m
Seattle/Tacoma Intl
Sun 8/23
11:00 pm-12:30 pm
2 stops10h 30m
$398
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Sat 7/25
4:45 pm-1:10 am
2 stops11h 25m
Seattle/Tacoma Intl
Fri 7/31
6:05 pm-8:05 am
2 stops11h 00m
$402
Showing 1-10 of 24 resultsSorted by cheapest first
Compare providers for flights from Boston to Seattle
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Seattle in May.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Boston-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Boston-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Boston to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Boston with our price prediction graph.
BOS-SEA
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Boston to Seattle
Prices
Airlines
Delays
How far ahead should I book a flight from Boston to Seattle?
The price you pay for your flight from Boston to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 58 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Boston to Seattle?
Currently, September is the cheapest month in which you can book a flight from Boston to Seattle (average of $318). Flying from Boston to Seattle in December is currently the most expensive (average of $527). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from BOS to SEA?
Find hourly flight availability from Boston to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 3, 2026.
When flying from Boston to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
How often are flights from Boston to Seattle delayed?
About 16% of weekly flights between Boston and Seattle have experienced delays in the past year, with the average delay time being 149 minutes.
What is the most punctual flight time for Boston to Seattle flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Wednesday tends to have the lowest number of delays on this route, whereas Saturday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Boston to Seattle flights?
Over the last year, JetBlue have had the lowest number of delays on this route, with just 14% of flights being delayed.
The best insider tips for Boston to Seattle flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Boston to Seattle trip
Our travel experts
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated May 3, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,Delta, andHawaiian Airlines from Boston to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.1
Comfort
7.8
Overall
7.9
Entertainment
7.0
Boarding
8.1
Crew
8.5
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Food
7.1
Comfort
7.8
Overall
7.9
Entertainment
7.0
Boarding
8.1
Crew
8.5
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Food
7.1
Comfort
7.8
Overall
7.9
Entertainment
7.0
Boarding
8.1
Crew
8.5
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Food
7.1
Comfort
7.8
Overall
7.9
Entertainment
7.0
Boarding
8.1
Crew
8.5
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Food
7.1
Comfort
7.8
Overall
7.9
Entertainment
7.0
Boarding
8.1
Crew
8.5
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Food
7.1
Comfort
7.8
Overall
7.9
Entertainment
7.0
Boarding
8.1
Crew
8.5
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Related info for your journey
Find useful and relevant information for your journey from Boston to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Tacoma
Ocean Shores
Olympia
Lynnwood
Lacey
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Renton
Kirkland
Ellensburg
Fife
Lakewood
Issaquah
Shoreline
Browse thousands of different options on Cheapflights for your next trip
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Complete your trip
Complete your trip to Seattle by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Boston to Seattle by cabin class
Find flights from Boston to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Boston and Seattle flights
Browse other Boston and Seattle flight options. Last updated on May 3, 2026.
Other flights from Boston
Browse through other flights departing from Boston. Flights are based on user searches made on Cheapflights and were last updated on May 3, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on May 3, 2026.
Top 8 airlines flying from Boston to Seattle
Discover the top 8 airlines that operate flights from Boston to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$118 | Average$317 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$133 | Average$349 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$153 | Average$388 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$172 | Average$325 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$188 | Average$406 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$213 | Average$394 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$234 | Average$421 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$256 | Average$462 | FlexibilityNo cancel fee | On-time71% |