$177+ Cheap flights from Seattle to Boston (SEA - BOS)
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 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOS
Aug 8 — Aug 151
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Boston 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 Seattle/Tacoma Intl to Boston Logan Intl are usually found in September or October, booked 70 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday
Cheap flight deals from Seattle to Boston
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Cheapest flights from Seattle to BostonExplore the most affordable flight options available from Seattle to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 9, 2026.
Explore the most affordable flight options available from Seattle to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 9, 2026.
This American Airlines deal was found by Cheapflights users on 7/8. 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 9/126:40 am
SEA
- BOS
1 stop10h 36m
American Airlines
Sat 9/196:00 am
BOS
- SEA
1 stop8h 40m
American Airlines
Deal found 7/8![American Airlines logo]()
$310
This Southwest deal was found by Cheapflights users on 7/7. 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 8/198:30 am
SEA
- BOS
1 stop12h 55m
Southwest
Wed 9/92:45 pm
BOS
- SEA
2 stops11h 20m
Southwest
Deal found 7/7![Southwest logo]()
$311
This Alaska Airlines deal was found by Cheapflights users on 7/8. 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 9/2911:06 pm
SEA
- BOS
Nonstop5h 33m
Alaska Airlines
Wed 9/3010:03 am
BOS
- SEA
Nonstop6h 12m
Alaska Airlines
Deal found 7/8![Alaska Airlines logo]()
$312
This Super.com deal was found by Cheapflights users on 7/9. 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.
Wed 9/3011:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Tue 10/66:59 pm
BOS
- SEA
Nonstop6h 39m
JetBlue
Deal found 7/9![JetBlue logo]()
$314
This Southwest deal was found by Cheapflights users on 7/8. 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 8/1311:00 pm
SEA
- BOS
2 stops10h 30m
Southwest
Wed 8/192:45 pm
BOS
- SEA
2 stops11h 40m
Southwest
Deal found 7/8![Southwest logo]()
$315
This Southwest deal was found by Cheapflights users on 7/7. 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 8/177:25 pm
SEA
- BOS
2 stops11h 30m
Southwest
Tue 8/259:05 am
BOS
- SEA
1 stop14h 55m
Southwest
Deal found 7/7![Southwest logo]()
$316
This Delta deal was found by Cheapflights users on 7/8. 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 8/2611:13 pm
SEA
- BOS
Nonstop5h 22m
Delta
Wed 9/27:45 am
BOS
- SEA
Nonstop6h 23m
Delta
Deal found 7/8![Delta logo]()
$317
This Cheapflightsfares deal was found by Cheapflights users on 7/6. 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 8/1210:13 pm
SEA
- BOS
1 stop10h 12m
JetBlue
Wed 8/197:09 am
BOS
- SEA
Nonstop6h 21m
JetBlue
Deal found 7/6![JetBlue logo]()
$318
This Cheapflightsfares deal was found by Cheapflights users on 7/8. 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.
Thu 9/1711:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Wed 9/236:59 pm
BOS
- SEA
Nonstop6h 39m
JetBlue
Deal found 7/8![JetBlue logo]()
$319
This JetBlue deal was found by Cheapflights users on 7/6. 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 8/2811:45 pm
SEA
- BOS
Nonstop5h 19m
JetBlue
Wed 9/212:57 pm
BOS
- SEA
1 stop11h 11m
JetBlue
Deal found 7/6![JetBlue logo]()
$320
This Southwest deal was found by Cheapflights users on 7/8. 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 8/267:30 pm
SEA
- BOS
2 stops11h 20m
Southwest
Mon 8/315:50 am
BOS
- SEA
2 stops11h 05m
Southwest
Deal found 7/8![Southwest logo]()
$321
This JetBlue deal was found by Cheapflights users on 7/8. 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 9/1511:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Fri 10/26:59 pm
BOS
- SEA
Nonstop6h 39m
JetBlue
Deal found 7/8![JetBlue logo]()
$322
Best flights from Seattle to BostonDiscover carefully curated flight deals from Seattle to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 9, 2026.
Discover carefully curated flight deals from Seattle to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 9, 2026.
This Southwest deal was found by Cheapflights users on 7/8. 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 9/105:15 am
SEA
- BOS
2 stops10h 10m
Southwest
Sun 9/138:00 am
BOS
- SEA
1 stop13h 05m
Southwest
Deal found 7/8![Southwest logo]()
$317
This Alaska Airlines deal was found by Cheapflights users on 7/7. 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 9/293:29 pm
SEA
- BOS
Nonstop5h 25m
Alaska Airlines
Wed 9/307:59 pm
BOS
- SEA
Nonstop6h 13m
Alaska Airlines
Deal found 7/7![Alaska Airlines logo]()
$317
This United Airlines deal was found by Cheapflights users on 7/4. 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.
Fri 10/3011:03 pm
SEA
- BOS
1 stop7h 36m
United Airlines
Sat 11/72:35 pm
BOS
- SEA
1 stop9h 03m
United Airlines
Deal found 7/4![United Airlines logo]()
$337
This Delta deal was found by Cheapflights users on 7/8. 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 10/2111:08 am
SEA
- BOS
Nonstop5h 33m
Delta
Mon 10/267:50 am
BOS
- SEA
Nonstop6h 24m
Delta
Deal found 7/8![Delta logo]()
$357
This JetBlue deal was found by Cheapflights users on 7/6. 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 8/2711:45 pm
SEA
- BOS
Nonstop5h 19m
JetBlue
Fri 9/47:26 pm
BOS
- SEA
Nonstop6h 23m
JetBlue
Deal found 7/6![JetBlue logo]()
$367
This Southwest deal was found by Cheapflights users on 7/4. 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 9/1711:05 pm
SEA
- BOS
1 stop6h 55m
Southwest
Sun 9/208:00 am
BOS
- SEA
1 stop13h 05m
Southwest
Deal found 7/4![Southwest logo]()
$352
This JetBlue deal was found by Cheapflights users on 7/7. 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 8/1211:40 am
SEA
- BOS
Nonstop5h 29m
JetBlue
Wed 8/267:09 am
BOS
- SEA
Nonstop6h 21m
JetBlue
Deal found 7/7![JetBlue logo]()
$387
This Southwest deal was found by Cheapflights users on 7/5. 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 8/1911:05 pm
SEA
- BOS
1 stop6h 55m
Southwest
Sun 8/238:00 am
BOS
- SEA
1 stop13h 05m
Southwest
Deal found 7/5![Southwest logo]()
$367
This Southwest deal was found by Cheapflights users on 7/4. 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.
Fri 10/235:50 am
SEA
- BOS
1 stop14h 20m
Southwest
Mon 10/265:00 am
BOS
- SEA
1 stop8h 30m
Southwest
Deal found 7/4![Southwest logo]()
$367
This Southwest deal was found by Cheapflights users on 7/4. 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 9/79:10 am
SEA
- BOS
1 stop12h 15m
Southwest
Fri 9/113:55 pm
BOS
- SEA
1 stop11h 00m
Southwest
Deal found 7/4![Southwest logo]()
$367
This Southwest deal was found by Cheapflights users on 7/8. 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.
Fri 8/79:10 am
SEA
- BOS
1 stop12h 15m
Southwest
Wed 8/192:10 pm
BOS
- SEA
1 stop9h 15m
Southwest
Deal found 7/8![Southwest logo]()
$372
This Southwest deal was found by Cheapflights users on 7/4. 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 8/3111:05 pm
SEA
- BOS
2 stops10h 35m
Southwest
Sat 9/51:00 pm
BOS
- SEA
2 stops11h 30m
Southwest
Deal found 7/4![Southwest logo]()
$382
Last-minute flights from Seattle to BostonDiscover last-minute flight deals from Seattle to Boston. Data last updated July 9, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Boston. Data last updated July 9, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 7/6. 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 8/1210:13 pm
SEA
- BOS
1 stop10h 12m
JetBlue
Wed 8/197:09 am
BOS
- SEA
Nonstop6h 21m
JetBlue
Deal found 7/6![JetBlue logo]()
$318
This JetBlue deal was found by Cheapflights users on 7/7. 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 8/1210:13 pm
SEA
- BOS
1 stop10h 12m
JetBlue
Tue 9/17:09 am
BOS
- SEA
Nonstop6h 21m
JetBlue
Deal found 7/7![JetBlue logo]()
$326
This Southwest deal was found by Cheapflights users on 7/8. 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 8/1311:00 pm
SEA
- BOS
2 stops10h 30m
Southwest
Wed 8/192:45 pm
BOS
- SEA
2 stops11h 40m
Southwest
Deal found 7/8![Southwest logo]()
$315
This flygcity.se deal was found by Cheapflights users on 7/6. 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 flygcity.se is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1311:40 am
SEA
- BOS
Nonstop5h 29m
JetBlue
Wed 8/197:09 am
BOS
- SEA
Nonstop6h 21m
JetBlue
Deal found 7/6![JetBlue logo]()
$324
This Southwest deal was found by Cheapflights users on 7/9. 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.
Fri 8/147:25 pm
SEA
- BOS
2 stops11h 30m
Southwest
Wed 8/192:45 pm
BOS
- SEA
2 stops11h 40m
Southwest
Deal found 7/9![Southwest logo]()
$325
This Southwest deal was found by Cheapflights users on 7/7. 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 8/177:25 pm
SEA
- BOS
2 stops11h 30m
Southwest
Tue 8/259:05 am
BOS
- SEA
1 stop14h 55m
Southwest
Deal found 7/7![Southwest logo]()
$316
This Southwest deal was found by Cheapflights users on 7/7. 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 8/198:30 am
SEA
- BOS
1 stop12h 55m
Southwest
Wed 9/92:45 pm
BOS
- SEA
2 stops11h 20m
Southwest
Deal found 7/7![Southwest logo]()
$311
This American Airlines deal was found by Cheapflights users on 7/7. 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 8/195:10 am
SEA
- BOS
1 stop8h 36m
American Airlines
Sat 8/293:20 pm
BOS
- SEA
1 stop8h 38m
American Airlines
Deal found 7/7![American Airlines logo]()
$314
This Delta deal was found by Cheapflights users on 7/8. 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 8/2611:13 pm
SEA
- BOS
Nonstop5h 22m
Delta
Wed 9/27:45 am
BOS
- SEA
Nonstop6h 23m
Delta
Deal found 7/8![Delta logo]()
$317
This Southwest deal was found by Cheapflights users on 7/8. 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 8/267:30 pm
SEA
- BOS
2 stops11h 20m
Southwest
Mon 8/315:50 am
BOS
- SEA
2 stops11h 05m
Southwest
Deal found 7/8![Southwest logo]()
$321
This JetBlue deal was found by Cheapflights users on 7/6. 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 8/2811:45 pm
SEA
- BOS
Nonstop5h 19m
JetBlue
Wed 9/212:57 pm
BOS
- SEA
1 stop11h 11m
JetBlue
Deal found 7/6![JetBlue logo]()
$320
One-way flights from Seattle to BostonSearch for one-way flight options from Seattle to Boston. Find affordable one-way fares based on user searches. Data last updated July 9, 2026.
Search for one-way flight options from Seattle to Boston. Find affordable one-way fares based on user searches. Data last updated July 9, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 7/7. 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.
Thu 9/1711:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Deal found 7/7![JetBlue logo]()
$177
This Southwest deal was found by Cheapflights users on 7/6. 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 9/105:15 am
SEA
- BOS
2 stops10h 10m
Southwest
Deal found 7/6![Southwest logo]()
$179
This Super.com deal was found by Cheapflights users on 7/6. 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 7/2811:46 pm
SEA
- BOS
Nonstop5h 18m
JetBlue
Deal found 7/6![JetBlue logo]()
$180
This Cheapflightsfares deal was found by Cheapflights users on 7/7. 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 8/1811:45 pm
SEA
- BOS
Nonstop5h 19m
JetBlue
Deal found 7/7![JetBlue logo]()
$182
This Southwest deal was found by Cheapflights users on 7/8. 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 8/48:15 am
SEA
- BOS
1 stop13h 10m
Southwest
Deal found 7/8![Southwest logo]()
$184
This United Airlines deal was found by Cheapflights users on 7/8. 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 7/221:55 pm
SEA
- BOS
1 stop8h 19m
United Airlines
Deal found 7/8![United Airlines logo]()
$185
This Kiwi.com deal was found by Cheapflights users on 7/6. 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.
Thu 8/68:53 pm
SEA
- BOS
2 stops33h 16m
Frontier
Deal found 7/6![Frontier logo]()
$186
This United Airlines deal was found by Cheapflights users on 7/6. 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.
Mon 7/2011:11 pm
SEA
- BOS
1 stop8h 54m
United Airlines
Deal found 7/6![United Airlines logo]()
$189
This American Airlines deal was found by Cheapflights users on 7/7. 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 9/29:58 pm
SEA
- BOS
1 stop9h 14m
American Airlines
Deal found 7/7![American Airlines logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 7/5. 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 8/188:53 pm
SEA
- BOS
2 stops35h 54m
Frontier
Deal found 7/5![Frontier logo]()
$193
This Alaska Airlines deal was found by Cheapflights users on 7/9. 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.
Sun 9/66:51 pm
SEA
- BOS
1 stop8h 18m
Alaska Airlines
Deal found 7/9![Alaska Airlines logo]()
$194
This Expedia deal was found by Cheapflights users on 7/6. 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 9/93:29 pm
SEA
- BOS
Nonstop5h 25m
Alaska Airlines
Deal found 7/6![Alaska Airlines logo]()
$195
Find flight deals from Seattle to Boston
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Boston (BOS). 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 July 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $310 (American Airlines) |
One-way from | $177 (Cheapflightsfares) |
Popular in | December |
Cheapest in | September |
Average price | $437 |
Good round-trip deal | $375 or less |
Good one-way deal | $215 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Boston 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 July 9, 2026.
Use the filters below to find and compare flights from Seattle to Boston that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Thu 9/10
5:15 am-6:25 pm
2 stops10h 10m
Boston Logan Intl
Sun 9/13
8:00 am-6:05 pm
1 stop13h 05m
$317
Quickest round-trip
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Tue 9/29
3:29 pm-11:54 pm
Nonstop5h 25m
Boston Logan Intl
Wed 9/30
7:59 pm-11:12 pm
Nonstop6h 13m
$317
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Fri 10/30
11:03 pm-9:39 am
1 stop7h 36m
Boston Logan Intl
Sat 11/7
2:35 pm-8:38 pm
1 stop9h 03m
$337
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Thu 9/17
11:05 pm-9:00 am
1 stop6h 55m
Boston Logan Intl
Sun 9/20
8:00 am-6:05 pm
1 stop13h 05m
$352
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Wed 10/21
11:08 am-7:41 pm
Nonstop5h 33m
Boston Logan Intl
Mon 10/26
7:50 am-11:14 am
Nonstop6h 24m
$357
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Thu 8/27
11:45 pm-8:04 am
Nonstop5h 19m
Boston Logan Intl
Fri 9/4
7:26 pm-10:49 pm
Nonstop6h 23m
$367
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Wed 8/19
11:05 pm-9:00 am
1 stop6h 55m
Boston Logan Intl
Sun 8/23
8:00 am-6:05 pm
1 stop13h 05m
$367
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Fri 10/23
5:50 am-11:10 pm
1 stop14h 20m
Boston Logan Intl
Mon 10/26
5:00 am-10:30 am
1 stop8h 30m
$367
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Mon 9/7
9:10 am-12:25 am
1 stop12h 15m
Boston Logan Intl
Fri 9/11
3:55 pm-11:55 pm
1 stop11h 00m
$367
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Fri 8/7
9:10 am-12:25 am
1 stop12h 15m
Boston Logan Intl
Wed 8/19
2:10 pm-8:25 pm
1 stop9h 15m
$372
Showing 1-10 of 23 resultsSorted by cheapest first
Compare providers for flights from Seattle to Boston
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 Seattle to Boston in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Seattle-Boston flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Boston flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Boston flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Boston 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 Seattle-Boston 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 Seattle to Boston
Have a flexible travel schedule? Discover the best time to fly to Boston from Seattle with our price prediction graph.
SEA-BOS
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 Seattle to Boston
Prices
Airlines
Delays
How far ahead should I book a flight from Seattle to Boston?
Booking 69 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Boston. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Seattle to Boston?
Currently, September is the cheapest month in which you can book a flight from Seattle to Boston (average of $316). Flying from Seattle to Boston in December is currently the most expensive (average of $540). 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 SEA to BOS?
Find hourly flight availability from Seattle to Boston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 9, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 43% on flights from Seattle to Boston by exploring options for tickets at noon.
What is the cheapest day to fly from Seattle to Boston?
Use this chart to determine the cheapest time to fly round-trip from Seattle to Boston. Price data was last updated on July 4, 2026.
Travelers seeking maximum savings on their Seattle to Boston flight should consider departing on Wednesday at noon when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
How often are flights from Seattle to Boston delayed?
About 16% of weekly flights between Seattle and Boston have experienced delays in the past year, with the average delay time being 172 minutes.
What is the most punctual flight time for Seattle to Boston flights?
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Seattle to Boston flights?
Over the last year, Delta have had the lowest number of delays on this route, with just 11% of flights being delayed.
The best insider tips for Seattle to Boston 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 Seattle to Boston trip
Our travel experts
Reviews of airlines servicing Boston
Get insights into the airlines that provide service to Boston. 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 Boston. Reviews last updated July 9, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,Delta, andUnited Airlines from Seattle to Boston 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
Crew
8.5
Food
7.1
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Overall
7.9
Crew
8.5
Food
7.1
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Overall
7.9
Crew
8.5
Food
7.1
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Overall
7.9
Crew
8.5
Food
7.1
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Overall
7.9
Crew
8.5
Food
7.1
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Overall
7.9
Crew
8.5
Food
7.1
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Related info for your journey
Find useful and relevant information for your journey from Seattle to Boston. 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 Boston?
Book flights to Boston if you plan to visit one of these locationsWaltham
Cambridge
Concord
Brockton
Hampton Beach
Seekonk
Cranston
Warwick
Dedham
Peabody
Randolph
Auburn
Fitchburg
York Beach
Chelsea
Londonderry
Swansea
North Falmouth
Smithfield
Braintree
Browse thousands of different options on Cheapflights for your next trip
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Other flights to Boston
Explore flights to Boston departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 9, 2026.
Complete your trip
Complete your trip to Boston by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to Boston by cabin class
Find flights from Seattle to Boston, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and Boston flights
Browse other Seattle and Boston flight options. Last updated on July 9, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on July 9, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 8 airlines flying from Seattle to Boston
Discover the top 8 airlines that operate flights from Seattle to Boston. 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 July 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$118 | Average$293 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$143 | Average$366 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$168 | Average$420 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$178 | Average$416 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$194 | Average$357 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$196 | Average$387 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$228 | Average$461 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$233 | Average$457 | FlexibilityNo cancel fee | On-time83% |