$161+ 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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOS
Jul 10 — Jul 171
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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Best
Last-minute
One-way
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 June 10, 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 June 10, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 6/7. 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.
Wed 7/810:19 pm
SEA
- BOS
1 stop10h 14m
JetBlue
Tue 7/147:29 pm
BOS
- SEA
Nonstop6h 25m
JetBlue
Deal found 6/7![JetBlue logo]()
$310
This Cheapflightsfares deal was found by Cheapflights users on 6/7. 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.
Wed 9/1611:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Wed 10/76:59 pm
BOS
- SEA
Nonstop6h 39m
JetBlue
Deal found 6/7![JetBlue logo]()
$312
This JetBlue deal was found by Cheapflights users on 6/7. 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.
Tue 7/710:19 pm
SEA
- BOS
1 stop10h 14m
JetBlue
Mon 7/207:29 pm
BOS
- SEA
Nonstop6h 25m
JetBlue
Deal found 6/7![JetBlue logo]()
$315
This Cheapflightsfares deal was found by Cheapflights users on 6/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2210:19 pm
SEA
- BOS
1 stop10h 07m
JetBlue
Tue 8/117:24 pm
BOS
- SEA
Nonstop6h 25m
JetBlue
Deal found 6/9![JetBlue logo]()
$316
This Delta deal was found by Cheapflights users on 6/8. 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.
Tue 9/153:55 pm
SEA
- BOS
Nonstop5h 27m
Delta
Wed 9/167:35 pm
BOS
- SEA
Nonstop6h 15m
Delta
Deal found 6/8![Delta logo]()
$317
This Orbitz deal was found by Cheapflights users on 6/8. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2611:06 pm
SEA
- BOS
Nonstop5h 33m
Multiple Airlines
Sat 10/31:00 pm
BOS
- SEA
1 stop10h 42m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$318
This Southwest deal was found by Cheapflights users on 6/8. 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 9/165:20 am
SEA
- BOS
2 stops10h 15m
Southwest
Sun 9/205:20 am
BOS
- SEA
1 stop11h 20m
Southwest
Deal found 6/8![Southwest logo]()
$320
This JetBlue deal was found by Cheapflights users on 6/8. 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.
Wed 9/239:40 pm
SEA
- BOS
1 stop10h 06m
JetBlue
Thu 10/16:59 pm
BOS
- SEA
Nonstop6h 39m
JetBlue
Deal found 6/8![JetBlue logo]()
$321
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2510:04 am
SEA
- BOS
1 stop17h 05m
Alaska Airlines
Tue 9/17:59 pm
BOS
- SEA
Nonstop6h 13m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$322
This Southwest deal was found by Cheapflights users on 6/9. 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.
Mon 8/107:25 pm
SEA
- BOS
2 stops11h 30m
Southwest
Mon 8/245:25 am
BOS
- SEA
1 stop11h 30m
Southwest
Deal found 6/9![Southwest logo]()
$323
This Cheapflightsfares deal was found by Cheapflights users on 6/8. 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.
Tue 10/2010:15 pm
SEA
- BOS
1 stop9h 31m
JetBlue
Fri 10/236:59 pm
BOS
- SEA
Nonstop6h 39m
JetBlue
Deal found 6/8![JetBlue logo]()
$325
This JetBlue deal was found by Cheapflights users on 6/8. 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.
Wed 9/1611:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Sat 9/191:00 pm
BOS
- SEA
1 stop10h 42m
JetBlue
Deal found 6/8![JetBlue logo]()
$326
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 June 10, 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 June 10, 2026.
This Southwest deal was found by Cheapflights users on 6/7. 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 7/2211:05 pm
SEA
- BOS
2 stops10h 05m
Southwest
Tue 7/285:50 am
BOS
- SEA
2 stops11h 55m
Southwest
Deal found 6/7![Southwest logo]()
$352
This JetBlue deal was found by Cheapflights users on 6/7. 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.
Sun 7/511:45 am
SEA
- BOS
Nonstop5h 28m
JetBlue
Mon 7/207:29 pm
BOS
- SEA
Nonstop6h 25m
JetBlue
Deal found 6/7![JetBlue logo]()
$374
This Delta deal was found by Cheapflights users on 6/8. 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 6/2411:10 am
SEA
- BOS
Nonstop5h 26m
Delta
Tue 6/307:45 am
BOS
- SEA
Nonstop6h 16m
Delta
Deal found 6/8![Delta logo]()
$412
This Alaska Airlines deal was found by Cheapflights users on 6/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/234:50 pm
SEA
- BOS
1 stop9h 31m
Alaska Airlines
Wed 10/287:50 am
BOS
- SEA
1 stop10h 27m
Alaska Airlines
Deal found 6/6![Alaska Airlines logo]()
$422
This Southwest deal was found by Cheapflights users on 6/8. 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 7/811:05 pm
SEA
- BOS
1 stop8h 50m
Southwest
Wed 7/155:30 pm
BOS
- SEA
1 stop9h 55m
Southwest
Deal found 6/8![Southwest logo]()
$352
This JetBlue deal was found by Cheapflights users on 6/6. 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 7/310:28 pm
SEA
- BOS
1 stop11h 27m
JetBlue
Tue 7/77:10 am
BOS
- SEA
Nonstop6h 23m
JetBlue
Deal found 6/6![JetBlue logo]()
$380
This Southwest deal was found by Cheapflights users on 6/5. 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 7/2211:05 pm
SEA
- BOS
2 stops10h 05m
Southwest
Mon 7/271:25 pm
BOS
- SEA
2 stops11h 25m
Southwest
Deal found 6/5![Southwest logo]()
$382
This Alaska Airlines deal was found by Cheapflights users on 6/5. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/104:59 pm
SEA
- BOS
1 stop9h 50m
Alaska Airlines
Sun 9/209:33 am
BOS
- SEA
1 stop9h 26m
Alaska Airlines
Deal found 6/5![Alaska Airlines logo]()
$427
This JetBlue deal was found by Cheapflights users on 6/9. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/111:45 am
SEA
- BOS
Nonstop5h 28m
JetBlue
Mon 7/67:10 am
BOS
- SEA
Nonstop6h 23m
JetBlue
Deal found 6/9![JetBlue logo]()
$425
This Southwest deal was found by Cheapflights users on 6/8. 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 7/295:00 am
SEA
- BOS
1 stop8h 05m
Southwest
Mon 8/37:55 am
BOS
- SEA
2 stops16h 35m
Southwest
Deal found 6/8![Southwest logo]()
$408
This Southwest deal was found by Cheapflights users on 6/6. 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.
Fri 7/37:20 pm
SEA
- BOS
2 stops9h 45m
Southwest
Wed 7/812:50 pm
BOS
- SEA
2 stops10h 40m
Southwest
Deal found 6/6![Southwest logo]()
$427
Last-minute flights from Seattle to BostonDiscover last-minute flight deals from Seattle to Boston. Data last updated June 10, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Boston. Data last updated June 10, 2026 and is based on user searches.
This JetBlue deal was found by Cheapflights users on 6/9. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/310:28 pm
SEA
- BOS
1 stop11h 27m
JetBlue
Sat 7/117:01 pm
BOS
- SEA
Nonstop6h 30m
JetBlue
Deal found 6/9![JetBlue logo]()
$321
This Delta deal was found by Cheapflights users on 6/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/47:29 am
SEA
- BOS
Nonstop5h 31m
Delta
Wed 7/87:29 pm
BOS
- SEA
Nonstop6h 33m
Delta
Deal found 6/7![Delta logo]()
$317
This lol.travel deal was found by Cheapflights users on 6/7. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/411:44 pm
SEA
- BOS
Nonstop5h 16m
JetBlue
Sat 7/117:01 pm
BOS
- SEA
Nonstop6h 30m
JetBlue
Deal found 6/7![JetBlue logo]()
$322
This flygcity.se deal was found by Cheapflights users on 6/6. 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.
Mon 7/611:45 am
SEA
- BOS
Nonstop5h 28m
JetBlue
Wed 7/157:29 pm
BOS
- SEA
Nonstop6h 25m
JetBlue
Deal found 6/6![JetBlue logo]()
$312
This JetBlue deal was found by Cheapflights users on 6/7. 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.
Tue 7/710:19 pm
SEA
- BOS
1 stop10h 14m
JetBlue
Mon 7/207:29 pm
BOS
- SEA
Nonstop6h 25m
JetBlue
Deal found 6/7![JetBlue logo]()
$315
This American Airlines deal was found by Cheapflights users on 6/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/710:35 pm
SEA
- BOS
1 stop8h 20m
American Airlines
Tue 7/144:46 pm
BOS
- SEA
1 stop9h 14m
American Airlines
Deal found 6/9![American Airlines logo]()
$328
This Cheapflightsfares deal was found by Cheapflights users on 6/7. 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.
Wed 7/810:19 pm
SEA
- BOS
1 stop10h 14m
JetBlue
Tue 7/147:29 pm
BOS
- SEA
Nonstop6h 25m
JetBlue
Deal found 6/7![JetBlue logo]()
$310
This Southwest deal was found by Cheapflights users on 6/5. 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 7/811:05 pm
SEA
- BOS
1 stop8h 50m
Southwest
Tue 7/285:00 am
BOS
- SEA
1 stop10h 05m
Southwest
Deal found 6/5![Southwest logo]()
$327
This JetBlue deal was found by Cheapflights users on 6/9. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/810:19 pm
SEA
- BOS
1 stop10h 14m
JetBlue
Wed 7/157:10 am
BOS
- SEA
Nonstop6h 23m
JetBlue
Deal found 6/9![JetBlue logo]()
$332
This Cheapflightsfares deal was found by Cheapflights users on 6/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2210:19 pm
SEA
- BOS
1 stop10h 07m
JetBlue
Tue 8/117:24 pm
BOS
- SEA
Nonstop6h 25m
JetBlue
Deal found 6/9![JetBlue logo]()
$316
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 June 10, 2026.
Search for one-way flight options from Seattle to Boston. Find affordable one-way fares based on user searches. Data last updated June 10, 2026.
This Super.com deal was found by Cheapflights users on 6/5. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2110:19 pm
SEA
- BOS
1 stop10h 14m
JetBlue
Deal found 6/5![JetBlue logo]()
$161
This Cheapflightsfares deal was found by Cheapflights users on 6/8. 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.
Tue 6/3010:28 pm
SEA
- BOS
1 stop10h 07m
JetBlue
Deal found 6/8![JetBlue logo]()
$163
This Southwest deal was found by Cheapflights users on 6/5. 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.
Sat 8/299:40 am
SEA
- BOS
1 stop7h 10m
Southwest
Deal found 6/5![Southwest logo]()
$164
This Southwest deal was found by Cheapflights users on 6/7. 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 11/25:30 am
SEA
- BOS
1 stop10h 20m
Southwest
Deal found 6/7![Southwest logo]()
$165
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.
Fri 7/310:28 pm
SEA
- BOS
1 stop11h 27m
JetBlue
Deal found 6/10![JetBlue logo]()
$168
This Southwest deal was found by Cheapflights users on 6/7. 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 8/1211:00 pm
SEA
- BOS
2 stops10h 30m
Southwest
Deal found 6/7![Southwest logo]()
$169
This Super.com deal was found by Cheapflights users on 6/7. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/711:45 am
SEA
- BOS
Nonstop5h 28m
JetBlue
Deal found 6/7![JetBlue logo]()
$171
This United Airlines deal was found by Cheapflights users on 6/6. 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.
Tue 6/2311:00 pm
SEA
- BOS
1 stop9h 16m
United Airlines
Deal found 6/6![United Airlines logo]()
$172
This Faresmojo deal was found by Cheapflights users on 6/9. 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 Faresmojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/1911:46 pm
SEA
- BOS
Nonstop5h 18m
JetBlue
Deal found 6/9![JetBlue logo]()
$175
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 June 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $307 (Alaska Airlines) |
One-way from | $161 (Super.com) |
Popular in | December |
Cheapest in | September |
Average price | $467 |
Good round-trip deal | $390 or less |
Good one-way deal | $222 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 June 10, 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
Wed 7/22
11:05 pm-12:10 pm
2 stops10h 05m
Boston Logan Intl
Tue 7/28
5:50 am-2:45 pm
2 stops11h 55m
$352
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Wed 7/8
11:05 pm-10:55 am
1 stop8h 50m
Boston Logan Intl
Wed 7/15
5:30 pm-12:25 am
1 stop9h 55m
$352
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Sun 7/5
11:45 am-8:13 pm
Nonstop5h 28m
Boston Logan Intl
Mon 7/20
7:29 pm-10:54 pm
Nonstop6h 25m
$374
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Fri 7/3
10:28 pm-12:55 pm
1 stop11h 27m
Boston Logan Intl
Tue 7/7
7:10 am-10:33 am
Nonstop6h 23m
$380
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Wed 7/22
11:05 pm-12:10 pm
2 stops10h 05m
Boston Logan Intl
Mon 7/27
1:25 pm-9:50 pm
2 stops11h 25m
$382
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Wed 7/29
5:00 am-4:05 pm
1 stop8h 05m
Boston Logan Intl
Mon 8/3
7:55 am-9:30 pm
2 stops16h 35m
$408
Quickest round-trip
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Wed 6/24
11:10 am-7:36 pm
Nonstop5h 26m
Boston Logan Intl
Tue 6/30
7:45 am-11:01 am
Nonstop6h 16m
$412
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Fri 10/23
4:50 pm-5:21 am
1 stop9h 31m
Boston Logan Intl
Wed 10/28
7:50 am-3:17 pm
1 stop10h 27m
$422
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Wed 7/1
11:45 am-8:13 pm
Nonstop5h 28m
Boston Logan Intl
Mon 7/6
7:10 am-10:33 am
Nonstop6h 23m
$425
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Thu 9/10
4:59 pm-5:49 am
1 stop9h 50m
Boston Logan Intl
Sun 9/20
9:33 am-3:59 pm
1 stop9h 26m
$427
Showing 1-10 of 22 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 June.
| 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 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 $307). Flying from Seattle to Boston in December is currently the most expensive (average of $537). 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 June 10, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 46% 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 June 8, 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 17% of weekly flights between Seattle and Boston have experienced delays in the past year, with the average delay time being 173 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?
Saturday tends to have the lowest number of delays on this route, whereas Thursday 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 June 10, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,Delta, andHawaiian 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.
Entertainment
7.0
Food
7.0
Comfort
7.8
Boarding
8.1
Overall
7.9
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Entertainment
7.0
Food
7.0
Comfort
7.8
Boarding
8.1
Overall
7.9
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Entertainment
7.0
Food
7.0
Comfort
7.8
Boarding
8.1
Overall
7.9
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Entertainment
7.0
Food
7.0
Comfort
7.8
Boarding
8.1
Overall
7.9
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Entertainment
7.0
Food
7.0
Comfort
7.8
Boarding
8.1
Overall
7.9
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Entertainment
7.0
Food
7.0
Comfort
7.8
Boarding
8.1
Overall
7.9
Crew
8.5
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
Hampton Beach
Brockton
Watertown
Seekonk
Cranston
Warwick
Peabody
Auburn
York Beach
Chelsea
Londonderry
Swansea
Old Orchard Beach
Lowell
Smithfield
Braintree
Sandwich
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 June 10, 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 June 10, 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 June 10, 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 June 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$118 | Average$299 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$141 | Average$347 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$170 | Average$416 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$178 | Average$402 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$194 | Average$326 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$196 | Average$394 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$230 | Average$460 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$233 | Average$457 | FlexibilityNo cancel fee | On-time83% |