$178+ 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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SEA
Jul 15 — Jul 221
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 October or September, booked 59 days in advance, depart on a Wednesday or Thursday 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 June 15, 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 June 15, 2026.
This JetBlue deal was found by Cheapflights users on 6/15. 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.
Wed 9/161:00 pm
BOS
- SEA
1 stop10h 42m
JetBlue
Tue 9/2911:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Deal found 6/15![JetBlue logo]()
$290
This Southwest deal was found by Cheapflights users on 6/11. 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.
Mon 10/55:25 am
BOS
- SEA
2 stops11h 10m
Southwest
Mon 10/512:15 am
SEA
- BOS
2 stops9h 25m
Southwest
Deal found 6/11![Southwest logo]()
$291
This Southwest deal was found by Cheapflights users on 6/10. 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.
Mon 8/245:25 am
BOS
- SEA
1 stop11h 30m
Southwest
Sat 8/299:20 am
SEA
- BOS
1 stop12h 05m
Southwest
Deal found 6/10![Southwest logo]()
$292
This Expedia deal was found by Cheapflights users on 6/13. 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 9/227:12 am
BOS
- SEA
Nonstop6h 13m
Multiple Airlines
Tue 9/299:40 pm
SEA
- BOS
1 stop10h 06m
Multiple Airlines
Deal found 6/13![Multiple Airlines logo]()
$295
This Expedia deal was found by Cheapflights users on 6/10. 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.
Wed 9/212:42 pm
BOS
- SEA
1 stop11h 22m
Multiple Airlines
Sat 9/127:40 am
SEA
- BOS
Nonstop5h 44m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$296
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 9/91:00 pm
BOS
- SEA
1 stop10h 42m
JetBlue
Fri 9/189:40 pm
SEA
- BOS
1 stop10h 06m
JetBlue
Deal found 6/11![JetBlue logo]()
$299
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Sat 9/53:20 pm
BOS
- SEA
1 stop10h 36m
American Airlines
Thu 9/105:00 am
SEA
- BOS
1 stop9h 59m
American Airlines
Deal found 6/11![American Airlines logo]()
$300
This Southwest deal was found by Cheapflights users on 6/11. 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
2 stops11h 10m
Southwest
Wed 8/198:30 am
SEA
- BOS
1 stop12h 55m
Southwest
Deal found 6/11![Southwest logo]()
$301
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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.
Sat 9/126:59 pm
BOS
- SEA
Nonstop6h 39m
JetBlue
Fri 9/1811:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Deal found 6/10![JetBlue logo]()
$302
This JetBlue deal was found by Cheapflights users on 6/11. 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.
Fri 9/181:00 pm
BOS
- SEA
1 stop10h 42m
JetBlue
Tue 9/229:40 pm
SEA
- BOS
1 stop10h 06m
JetBlue
Deal found 6/11![JetBlue logo]()
$304
This Southwest deal was found by Cheapflights users on 6/10. 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.
Tue 9/810:05 am
BOS
- SEA
1 stop10h 50m
Southwest
Wed 9/95:20 am
SEA
- BOS
2 stops10h 15m
Southwest
Deal found 6/10![Southwest logo]()
$305
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 June 15, 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 June 15, 2026.
This Delta deal was found by Cheapflights users on 6/15. 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.
Wed 8/197:35 pm
BOS
- SEA
Nonstop6h 36m
Delta
Wed 8/2611:13 pm
SEA
- BOS
Nonstop5h 22m
Delta
Deal found 6/15![Delta logo]()
$317
This Southwest deal was found by Cheapflights users on 6/15. 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.
Mon 8/103:55 pm
BOS
- SEA
1 stop10h 35m
Southwest
Tue 8/1810:30 pm
SEA
- BOS
1 stop11h 10m
Southwest
Deal found 6/15![Southwest logo]()
$348
This JetBlue deal was found by Cheapflights users on 6/11. 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.
Wed 8/1912:42 pm
BOS
- SEA
1 stop11h 22m
JetBlue
Thu 8/2711:44 pm
SEA
- BOS
Nonstop5h 16m
JetBlue
Deal found 6/11![JetBlue logo]()
$363
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Wed 8/267:59 pm
BOS
- SEA
Nonstop6h 13m
Alaska Airlines
Sun 8/306:00 am
SEA
- BOS
Nonstop5h 28m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$377
This Southwest deal was found by Cheapflights users on 6/15. 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.
Tue 8/42:45 pm
BOS
- SEA
2 stops11h 40m
Southwest
Tue 8/1111:05 pm
SEA
- BOS
1 stop10h 10m
Southwest
Deal found 6/15![Southwest logo]()
$357
This JetBlue deal was found by Cheapflights users on 6/10. 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 9/712:42 pm
BOS
- SEA
1 stop11h 22m
JetBlue
Wed 9/99:40 pm
SEA
- BOS
1 stop10h 06m
JetBlue
Deal found 6/10![JetBlue logo]()
$371
This Southwest deal was found by Cheapflights users on 6/13. 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.
Tue 8/253:20 pm
BOS
- SEA
2 stops10h 45m
Southwest
Thu 9/1011:00 pm
SEA
- BOS
2 stops10h 30m
Southwest
Deal found 6/13![Southwest logo]()
$367
This Alaska Airlines deal was found by Cheapflights users on 6/13. 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 8/207:59 pm
BOS
- SEA
Nonstop6h 13m
Alaska Airlines
Mon 8/2411:06 pm
SEA
- BOS
Nonstop5h 33m
Alaska Airlines
Deal found 6/13![Alaska Airlines logo]()
$412
This Southwest deal was found by Cheapflights users on 6/10. 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.
Tue 7/75:30 pm
BOS
- SEA
1 stop9h 55m
Southwest
Wed 7/811:05 pm
SEA
- BOS
2 stops10h 05m
Southwest
Deal found 6/10![Southwest logo]()
$387
This Southwest deal was found by Cheapflights users on 6/10. 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 30m
Southwest
Fri 7/317:30 pm
SEA
- BOS
2 stops9h 35m
Southwest
Deal found 6/10![Southwest logo]()
$404
This Southwest deal was found by Cheapflights users on 6/10. 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 7/43:25 pm
BOS
- SEA
2 stops10h 50m
Southwest
Mon 7/1310:45 pm
SEA
- BOS
2 stops10h 25m
Southwest
Deal found 6/10![Southwest logo]()
$419
This Southwest deal was found by Cheapflights users on 6/14. 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 7/307:55 am
BOS
- SEA
2 stops16h 35m
Southwest
Thu 7/3010:45 pm
SEA
- BOS
2 stops10h 25m
Southwest
Deal found 6/14![Southwest logo]()
$444
Last-minute flights from Boston to SeattleDiscover last-minute flight deals from Boston to Seattle. Data last updated June 15, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Seattle. Data last updated June 15, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 6/14. 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.
Tue 6/237:10 am
BOS
- SEA
Nonstop6h 25m
JetBlue
Wed 7/810:19 pm
SEA
- BOS
1 stop10h 14m
JetBlue
Deal found 6/14![JetBlue logo]()
$395
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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 6/247:10 am
BOS
- SEA
Nonstop6h 25m
JetBlue
Sat 7/411:44 pm
SEA
- BOS
Nonstop5h 16m
JetBlue
Deal found 6/10![JetBlue logo]()
$344
This United Airlines deal was found by Cheapflights users on 6/10. 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 6/244:57 pm
BOS
- SEA
1 stop9h 13m
United Airlines
Mon 6/2911:00 pm
SEA
- BOS
1 stop7h 48m
United Airlines
Deal found 6/10![United Airlines logo]()
$353
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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 6/247:10 am
BOS
- SEA
Nonstop6h 25m
JetBlue
Wed 7/1511:45 am
SEA
- BOS
Nonstop5h 28m
JetBlue
Deal found 6/10![JetBlue logo]()
$386
This United Airlines deal was found by Cheapflights users on 6/10. 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 6/244:57 pm
BOS
- SEA
1 stop9h 13m
United Airlines
Sat 6/2711:11 pm
SEA
- BOS
1 stop7h 18m
United Airlines
Deal found 6/10![United Airlines logo]()
$394
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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 6/247:10 am
BOS
- SEA
Nonstop6h 25m
JetBlue
Tue 6/3011:45 am
SEA
- BOS
Nonstop5h 28m
JetBlue
Deal found 6/10![JetBlue logo]()
$403
This United Airlines deal was found by Cheapflights users on 6/12. 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 6/246:00 am
BOS
- SEA
1 stop8h 38m
United Airlines
Sat 7/47:00 am
SEA
- BOS
1 stop7h 31m
United Airlines
Deal found 6/12![United Airlines logo]()
$410
This Delta deal was found by Cheapflights users on 6/11. 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.
Thu 6/257:25 pm
BOS
- SEA
Nonstop6h 24m
Delta
Tue 7/77:29 am
SEA
- BOS
Nonstop5h 31m
Delta
Deal found 6/11![Delta logo]()
$377
This American Airlines deal was found by Cheapflights users on 6/11. 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 6/255:31 am
BOS
- SEA
1 stop9h 15m
American Airlines
Tue 7/710:35 pm
SEA
- BOS
1 stop8h 20m
American Airlines
Deal found 6/11![American Airlines logo]()
$387
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Thu 6/255:45 am
BOS
- SEA
1 stop9h 06m
United Airlines
Tue 6/308:15 am
SEA
- BOS
1 stop7h 59m
United Airlines
Deal found 6/11![United Airlines logo]()
$391
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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 6/255:56 pm
BOS
- SEA
Nonstop6h 30m
Alaska Airlines
Tue 7/76:21 am
SEA
- BOS
1 stop20h 19m
Alaska Airlines
Deal found 6/11![Alaska Airlines logo]()
$397
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 June 15, 2026.
Search for one-way flight options from Boston to Seattle. Find affordable one-way fares based on user searches. Data last updated June 15, 2026.
This CheapOair deal was found by Cheapflights users on 6/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/48:28 am
BOS
- SEA
1 stop11h 30m
Alaska Airlines
Deal found 6/11![Alaska Airlines logo]()
$178
This Southwest deal was found by Cheapflights users on 6/12. 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.
Mon 8/1711:15 am
BOS
- SEA
1 stop11h 20m
Southwest
Deal found 6/12![Southwest logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 6/15. 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.
Fri 9/1112:11 pm
BOS
- SEA
2 stops24h 49m
Multiple Airlines
Deal found 6/15![Multiple Airlines logo]()
$183
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Thu 6/256:05 am
BOS
- SEA
1 stop8h 52m
United Airlines
Deal found 6/10![United Airlines logo]()
$184
This Southwest deal was found by Cheapflights users on 6/15. 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.
Mon 8/245:50 am
BOS
- SEA
2 stops11h 05m
Southwest
Deal found 6/15![Southwest logo]()
$185
This CheapOair deal was found by Cheapflights users on 6/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/208:00 am
BOS
- SEA
1 stop12h 51m
Alaska Airlines
Deal found 6/11![Alaska Airlines logo]()
$189
This Southwest deal was found by Cheapflights users on 6/12. 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 8/2010:30 am
BOS
- SEA
2 stops14h 15m
Southwest
Deal found 6/12![Southwest logo]()
$191
This United Airlines deal was found by Cheapflights users on 6/10. 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 9/307:22 am
BOS
- SEA
2 stops16h 53m
United Airlines
Deal found 6/10![United Airlines logo]()
$192
This Delta deal was found by Cheapflights users on 6/14. 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.
Thu 8/207:35 pm
BOS
- SEA
Nonstop6h 36m
Delta
Deal found 6/14![Delta logo]()
$194
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Tue 6/304:15 pm
BOS
- SEA
1 stop11h 58m
United Airlines
Deal found 6/10![United Airlines logo]()
$196
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 June 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $290 (JetBlue) |
One-way from | $178 (CheapOair) |
Popular in | December |
Cheapest in | October |
Average price | $467 |
Good round-trip deal | $400 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 June 15, 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
Wed 8/19
7:35 pm-11:11 pm
Nonstop6h 36m
Seattle/Tacoma Intl
Wed 8/26
11:13 pm-7:35 am
Nonstop5h 22m
$317
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Mon 8/10
3:55 pm-11:30 pm
1 stop10h 35m
Seattle/Tacoma Intl
Tue 8/18
10:30 pm-12:40 pm
1 stop11h 10m
$348
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Tue 8/4
2:45 pm-11:25 pm
2 stops11h 40m
Seattle/Tacoma Intl
Tue 8/11
11:05 pm-12:15 pm
1 stop10h 10m
$357
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Wed 8/19
12:42 pm-9:04 pm
1 stop11h 22m
Seattle/Tacoma Intl
Thu 8/27
11:44 pm-8:00 am
Nonstop5h 16m
$363
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Tue 8/25
3:20 pm-11:05 pm
2 stops10h 45m
Seattle/Tacoma Intl
Thu 9/10
11:00 pm-12:30 pm
2 stops10h 30m
$367
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Mon 9/7
12:42 pm-9:04 pm
1 stop11h 22m
Seattle/Tacoma Intl
Wed 9/9
9:40 pm-10:46 am
1 stop10h 06m
$371
Quickest round-trip
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Wed 8/26
7:59 pm-11:12 pm
Nonstop6h 13m
Seattle/Tacoma Intl
Sun 8/30
6:00 am-2:28 pm
Nonstop5h 28m
$377
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Tue 7/7
5:30 pm-12:25 am
1 stop9h 55m
Seattle/Tacoma Intl
Wed 7/8
11:05 pm-12:10 pm
2 stops10h 05m
$387
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Sat 7/25
4:45 pm-1:15 am
2 stops11h 30m
Seattle/Tacoma Intl
Fri 7/31
7:30 pm-8:05 am
2 stops9h 35m
$404
BostonSeattle
BOS - SEA
BOSSEA
Boston Logan Intl
Thu 8/20
7:59 pm-11:12 pm
Nonstop6h 13m
Seattle/Tacoma Intl
Mon 8/24
11:06 pm-7:39 am
Nonstop5h 33m
$412
Showing 1-10 of 23 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 June.
| 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 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 | |
| Price Accuracy2 stars | Trust Score*1 star |
- 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, October is the cheapest month in which you can book a flight from Boston to Seattle (average of $332). Flying from Boston to Seattle in December is currently the most expensive (average of $532). 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 June 15, 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 151 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 15% 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 June 15, 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.
Overall
7.9
Food
7.1
Boarding
8.1
Crew
8.5
Comfort
7.8
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Overall
7.9
Food
7.1
Boarding
8.1
Crew
8.5
Comfort
7.8
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Overall
7.9
Food
7.1
Boarding
8.1
Crew
8.5
Comfort
7.8
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Overall
7.9
Food
7.1
Boarding
8.1
Crew
8.5
Comfort
7.8
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Overall
7.9
Food
7.1
Boarding
8.1
Crew
8.5
Comfort
7.8
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Overall
7.9
Food
7.1
Boarding
8.1
Crew
8.5
Comfort
7.8
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - 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
Lacey
Ocean Shores
Leavenworth
Olympia
Edmonds
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Lynnwood
Renton
Ellensburg
Fife
Lakewood
Issaquah
Marysville
Shoreline
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Complete your trip
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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 June 15, 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 June 15, 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 June 15, 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 June 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$108 | Average$277 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$145 | Average$384 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$153 | Average$412 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$174 | Average$366 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$230 | Average$428 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$250 | Average$398 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$256 | Average$455 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$259 | Average$406 | FlexibilityNo cancel fee | On-time63% |