$186+ Cheap flights from Massachusetts to Seattle (SEA)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/19. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SEA
Nov 9 — Nov 161
Round-trip
1 adult, Economy
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Find cheap flights from Massachusetts to Seattle with Cheapflights
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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
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Cheapest flights from Massachusetts to SeattleExplore the most affordable flight options available from Massachusetts to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 10, 2026.
Explore the most affordable flight options available from Massachusetts to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 10, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 10/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:20 pm -
Nonstop6h 22m
Thu 10/2211:55 pm -
Nonstop5h 21m
Deal found 10/5![JetBlue logo]()
$328
This Alaska Airlines deal was found by Cheapflights users on 10/7. 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.
Wed 11/187:03 am -
1 stop12h 53m
Sun 11/226:00 am -
1 stop20h 24m
Deal found 10/7![Alaska Airlines logo]()
$334
This FlightHub deal was found by Cheapflights users on 10/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:20 pm -
Nonstop6h 22m
Tue 10/274:54 pm -
1 stop9h 34m
Deal found 10/5![Multiple Airlines logo]()
$335
This Alaska Airlines deal was found by Cheapflights users on 10/6. 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.
Sat 11/77:03 am -
1 stop17h 26m
Sat 11/145:19 pm -
1 stop9h 27m
Deal found 10/6![Alaska Airlines logo]()
$336
This KAYAK deal was found by Cheapflights users on 10/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:20 pm -
Nonstop6h 22m
Sat 10/2411:53 pm -
Nonstop5h 21m
Deal found 10/8![JetBlue logo]()
$337
This Kissandfly.com deal was found by Cheapflights users on 10/7. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:03 am -
Nonstop6h 17m
Wed 10/2811:08 am -
Nonstop5h 33m
Deal found 10/7![Alaska Airlines logo]()
$338
This Southwest deal was found by Cheapflights users on 10/7. 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 11/184:40 pm -
1 stop9h 10m
Fri 11/275:30 am -
1 stop7h 40m
Deal found 10/7![Southwest logo]()
$339
This Justfly.com deal was found by Cheapflights users on 10/6. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:20 pm -
Nonstop6h 22m
Mon 11/28:48 pm -
1 stop16h 53m
Deal found 10/6![Multiple Airlines logo]()
$340
This Alaska Airlines deal was found by Cheapflights users on 10/7. 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.
Wed 10/287:51 am -
1 stop13h 11m
Fri 10/307:18 am -
Nonstop5h 37m
Deal found 10/7![Alaska Airlines logo]()
$341
This Southwest deal was found by Cheapflights users on 10/6. 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 12/45:55 pm -
1 stop8h 35m
Tue 12/86:30 am -
1 stop6h 55m
Deal found 10/6![Southwest logo]()
$342
This Alaska Airlines deal was found by Cheapflights users on 10/8. 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.
Thu 10/297:51 am -
1 stop15h 35m
Thu 12/33:40 pm -
Nonstop5h 19m
Deal found 10/8![Alaska Airlines logo]()
$344
This flugladen.de deal was found by Cheapflights users on 10/6. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:20 pm -
Nonstop6h 22m
Wed 10/283:32 pm -
Nonstop5h 27m
Deal found 10/6![Multiple Airlines logo]()
$345
Best flights from Massachusetts to SeattleDiscover carefully curated flight deals from Massachusetts to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 10, 2026.
Discover carefully curated flight deals from Massachusetts to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 10, 2026.
This Southwest deal was found by Cheapflights users on 10/4. 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.
Wed 11/45:55 pm -
1 stop8h 40m
Fri 11/65:30 am -
1 stop13h 35m
Deal found 10/4![Southwest logo]()
$348
This Alaska Airlines deal was found by Cheapflights users on 10/7. 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 10/277:51 am -
1 stop13h 11m
Sat 10/313:32 pm -
Nonstop5h 27m
Deal found 10/7![Alaska Airlines logo]()
$357
This Delta deal was found by Cheapflights users on 10/7. 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.
Thu 11/267:50 am -
Nonstop6h 30m
Tue 12/13:45 pm -
Nonstop5h 17m
Deal found 10/7![Delta logo]()
$357
This American Airlines deal was found by Cheapflights users on 10/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/205:16 pm -
1 stop8h 43m
Sat 10/2410:48 pm -
1 stop15h 01m
Deal found 10/5![American Airlines logo]()
$522
This Southwest deal was found by Cheapflights users on 10/6. 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.
Wed 11/185:55 pm -
1 stop8h 40m
Sat 11/2112:15 am -
1 stop7h 55m
Deal found 10/6![Southwest logo]()
$355
This Delta deal was found by Cheapflights users on 10/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/133:45 pm -
Nonstop6h 21m
Thu 11/1911:30 am -
1 stop8h 21m
Deal found 10/6![Delta logo]()
$367
This Delta deal was found by Cheapflights users on 10/7. 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.
Mon 11/235:45 am -
1 stop7h 57m
Mon 11/3011:35 am -
1 stop8h 16m
Deal found 10/7![Delta logo]()
$397
This Alaska Airlines deal was found by Cheapflights users on 10/5. 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.
Fri 12/257:00 am -
Nonstop6h 38m
Thu 12/313:35 pm -
Nonstop5h 24m
Deal found 10/5![Alaska Airlines logo]()
$447
This Southwest deal was found by Cheapflights users on 10/5. 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.
Thu 10/222:35 pm -
2 stops13h 25m
Sun 11/812:15 am -
1 stop7h 55m
Deal found 10/5![Southwest logo]()
$439
This American Airlines deal was found by Cheapflights users on 10/8. 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.
Fri 10/235:16 pm -
1 stop21h 53m
Tue 10/2710:48 pm -
1 stop15h 01m
Deal found 10/8![American Airlines logo]()
$522
This Delta deal was found by Cheapflights users on 10/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/45:55 pm -
Nonstop6h 25m
Fri 11/611:10 pm -
Nonstop5h 25m
Deal found 10/4![Delta logo]()
$447
This Delta deal was found by Cheapflights users on 10/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/810:40 am -
Nonstop6h 29m
Mon 12/143:45 pm -
Nonstop5h 17m
Deal found 10/5![Delta logo]()
$447
This Delta deal was found by Cheapflights users on 10/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/103:18 pm -
2 stops31h 27m
Sat 2/1311:05 pm -
2 stops12h 32m
Deal found 10/10![Delta logo]()
$515
This Delta deal was found by Cheapflights users on 10/8. 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.
Fri 10/234:15 pm -
2 stops10h 44m
Tue 10/2711:10 pm -
2 stops13h 17m
Deal found 10/8![Delta logo]()
$537
This Delta deal was found by Cheapflights users on 10/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/123:18 pm -
2 stops30h 40m
Mon 2/1511:05 pm -
2 stops12h 32m
Deal found 10/10![Delta logo]()
$574
This Delta deal was found by Cheapflights users on 10/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/123:18 pm -
2 stops30h 40m
Sat 2/1311:05 pm -
2 stops12h 32m
Deal found 10/10![Delta logo]()
$587
This Delta deal was found by Cheapflights users on 10/7. 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.
Thu 12/174:08 pm -
2 stops43h 46m
Mon 1/411:05 pm -
2 stops12h 32m
Deal found 10/7![Delta logo]()
$594
This Delta deal was found by Cheapflights users on 10/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/93:18 pm -
2 stops31h 27m
Sun 2/1411:05 pm -
2 stops12h 32m
Deal found 10/10![Delta logo]()
$595
This Delta deal was found by Cheapflights users on 10/7. 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.
Wed 12/164:08 pm -
2 stops19h 56m
Mon 1/411:05 pm -
2 stops12h 32m
Deal found 10/7![Delta logo]()
$604
This Delta deal was found by Cheapflights users on 10/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/204:15 pm -
2 stops10h 44m
Sat 10/2411:50 pm -
2 stops12h 37m
Deal found 10/5![Delta logo]()
$613
Last-minute flights from Massachusetts to SeattleDiscover last-minute flight deals from Massachusetts to Seattle. Data last updated October 10, 2026 and is based on user searches.
Discover last-minute flight deals from Massachusetts to Seattle. Data last updated October 10, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 10/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:20 pm -
Nonstop6h 22m
Thu 10/2211:55 pm -
Nonstop5h 21m
Deal found 10/5![JetBlue logo]()
$328
This FlightHub deal was found by Cheapflights users on 10/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:20 pm -
Nonstop6h 22m
Tue 10/274:54 pm -
1 stop9h 34m
Deal found 10/5![Multiple Airlines logo]()
$335
This KAYAK deal was found by Cheapflights users on 10/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:20 pm -
Nonstop6h 22m
Fri 10/2311:55 pm -
Nonstop5h 21m
Deal found 10/8![JetBlue logo]()
$337
This Kissandfly.com deal was found by Cheapflights users on 10/7. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:03 am -
Nonstop6h 17m
Wed 10/2811:08 am -
Nonstop5h 33m
Deal found 10/7![Alaska Airlines logo]()
$338
This flugladen.de deal was found by Cheapflights users on 10/6. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:20 pm -
Nonstop6h 22m
Wed 10/283:32 pm -
Nonstop5h 27m
Deal found 10/6![Multiple Airlines logo]()
$345
This CheapTickets.ch deal was found by Cheapflights users on 10/8. 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 CheapTickets.ch is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:20 pm -
Nonstop6h 22m
Sat 10/317:18 am -
Nonstop5h 37m
Deal found 10/8![Multiple Airlines logo]()
$346
This Justfly.com deal was found by Cheapflights users on 10/6. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:20 pm -
Nonstop6h 22m
Mon 11/28:48 pm -
1 stop16h 53m
Deal found 10/6![Multiple Airlines logo]()
$340
This Alaska Airlines deal was found by Cheapflights users on 10/7. 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.
Wed 10/287:51 am -
1 stop13h 11m
Fri 10/307:18 am -
Nonstop5h 37m
Deal found 10/7![Alaska Airlines logo]()
$341
This Alaska Airlines deal was found by Cheapflights users on 10/8. 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.
Thu 10/297:51 am -
1 stop15h 35m
Thu 12/33:40 pm -
Nonstop5h 19m
Deal found 10/8![Alaska Airlines logo]()
$344
This Alaska Airlines deal was found by Cheapflights users on 10/6. 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.
Sat 11/77:03 am -
1 stop17h 26m
Sat 11/145:19 pm -
1 stop9h 27m
Deal found 10/6![Alaska Airlines logo]()
$336
This Alaska Airlines deal was found by Cheapflights users on 10/7. 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.
Wed 11/187:03 am -
1 stop12h 53m
Sun 11/226:00 am -
1 stop20h 24m
Deal found 10/7![Alaska Airlines logo]()
$334
This Southwest deal was found by Cheapflights users on 10/7. 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 11/184:40 pm -
1 stop9h 10m
Fri 11/275:30 am -
1 stop7h 40m
Deal found 10/7![Southwest logo]()
$339
One-way flights from Massachusetts to SeattleSearch for one-way flight options from Massachusetts to Seattle. Find affordable one-way fares based on user searches. Data last updated October 10, 2026.
Search for one-way flight options from Massachusetts to Seattle. Find affordable one-way fares based on user searches. Data last updated October 10, 2026.
This Expedia deal was found by Cheapflights users on 10/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/197:03 am -
1 stop12h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Alaska Airlines logo]()
$186
This Delta deal was found by Cheapflights users on 10/8. 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.
Mon 11/235:05 pm -
1 stop8h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Delta logo]()
$189
This Mytrip deal was found by Cheapflights users on 10/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/139:03 am -
Nonstop6h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/9![Alaska Airlines logo]()
$190
This Super.com deal was found by Cheapflights users on 10/5. 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.
Mon 10/197:20 pm -
Nonstop6h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![JetBlue logo]()
$191
This Alaska Airlines deal was found by Cheapflights users on 10/6. 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.
Tue 11/177:03 am -
2 stops14h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Alaska Airlines logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 10/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/311:08 am -
2 stops31h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Frontier logo]()
$193
This United Airlines deal was found by Cheapflights users on 10/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/267:20 am -
2 stops11h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![United Airlines logo]()
$194
This Southwest deal was found by Cheapflights users on 10/5. 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.
Fri 12/41:10 pm -
2 stops12h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Southwest logo]()
$197
This Delta deal was found by Cheapflights users on 10/8. 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.
Sun 12/63:05 pm -
1 stop8h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Delta logo]()
$199
This Southwest deal was found by Cheapflights users on 10/6. 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 12/175:00 am -
2 stops16h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Southwest logo]()
$200
This Kiwi.com deal was found by Cheapflights users on 10/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/612:11 pm -
2 stops30h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Multiple Airlines logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 10/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3012:07 pm -
2 stops30h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/9![Multiple Airlines logo]()
$202
Find flight deals from Massachusetts to Seattle
Keep the following information in mind while searching for Massachusetts to Seattle flight deals. Data was last updated October 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $328 (Cheapflightsfares) |
One-way from | $186 (Expedia) |
Popular in | December |
Cheapest in | March |
Average price | $426 |
Good round-trip deal | $437 or less |
Good one-way deal | $257 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Massachusetts 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 7,457,451 searches. Data last updated October 10, 2026.
Use the filters below to find and compare flights from Massachusetts to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BostonSeattle
BOS Boston Logan Intl - SEA Seattle/Tacoma Intl
BOSSEA
Boston Logan Intl
Tue 11/3
5:39 am-10:40 am
1 stop8h 01m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$189
BostonSeattle
BOS Boston Logan Intl - SEA Seattle/Tacoma Intl
BOSSEA
Boston Logan Intl
Thu 11/26
6:00 am-12:19 pm
1 stop9h 19m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$199
Quickest round-trip
BostonSeattle
BOS Boston Logan Intl - SEA Seattle/Tacoma Intl
BOSSEA
Boston Logan Intl
Thu 11/12
3:45 pm-7:06 pm
Nonstop6h 21m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$224
BostonSeattle
BOS Boston Logan Intl - SEA Seattle/Tacoma Intl
BOSSEA
Boston Logan Intl
Thu 12/31
3:30 pm-11:30 pm
2 stops11h 00m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$239
WorcesterSeattle
ORH Worcester - SEA Seattle/Tacoma Intl
ORHSEA
Worcester
Mon 11/2
5:36 pm-2:20 pm
2 stops23h 44m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$244
BostonSeattle
BOS Boston Logan Intl - SEA Seattle/Tacoma Intl
BOSSEA
Boston Logan Intl
Wed 10/21
8:05 am-9:01 pm
2 stops15h 56m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$244
BostonSeattle
BOS Boston Logan Intl - SEA Seattle/Tacoma Intl
BOSSEA
Boston Logan Intl
Wed 10/14
1:00 pm-9:20 pm
1 stop11h 20m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$249
BostonSeattle
BOS Boston Logan Intl - SEA Seattle/Tacoma Intl
BOSSEA
Boston Logan Intl
Sat 11/7
7:30 am-5:59 pm
2 stops13h 29m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$249
BostonSeattle
BOS Boston Logan Intl - SEA Seattle/Tacoma Intl
BOSSEA
Boston Logan Intl
Thu 11/5
12:00 pm-11:15 pm
2 stops14h 15m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$249
WorcesterSeattle
ORH Worcester - SEA Seattle/Tacoma Intl
ORHSEA
Worcester
Mon 12/14
4:08 pm-7:45 pm
2 stops30h 37m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$250
Showing 1-10 of 43 resultsSorted by cheapest first
Best time to book a flight from Massachusetts to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Massachusetts with our price prediction graph.
BOS-SEA
ORH-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 Massachusetts to Seattle
USMA-SEA
BOS-SEA
ORH-SEA
What is the cheapest month to book a flight from Massachusetts to Seattle?
Currently, March is the cheapest month in which you can book a flight from Massachusetts to Seattle (average of $355). Flying from Massachusetts 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 MA to SEA?
Find hourly flight availability from Massachusetts 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 October 10, 2026.
When flying from Massachusetts 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.
Weekly flight availability from Massachusetts to Seattle
Explore weekly flight availability from Massachusetts to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated October 10, 2026.
The most flights from USMA to SEA are scheduled on a Thursday (32 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).
How much does it cost to fly round-trip from Massachusetts to Seattle?
Airfare is below average for this route at the moment.
Massachusetts to Seattle flights typically cost between $346 and $505 in October.The cheapest round-trip price found within the last 5 days was $328 on JetBlue (Oct 20-Oct 22).
How far ahead should I book a flight from Massachusetts to Seattle?
Booking 84 days in advance of your planned departure date is, on average, the best time to get cheap flights from Massachusetts to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Related info for your journey
Find useful and relevant information for your journey from Massachusetts 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
Renton
Tacoma
Lacey
Leavenworth
Olympia
Tukwila
Snoqualmie
Puyallup
Lynnwood
Centralia
Kent
Tumwater
Ocean Shores
Ellensburg
Issaquah
Marysville
Lakewood
Fife
Poulsbo
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Massachusetts to Seattle
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Complete your trip
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Search flights from Massachusetts to Seattle by cabin class
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Massachusetts and Seattle flights
Browse other Massachusetts and Seattle flight options. Last updated on October 10, 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 October 10, 2026.
Massachusetts to Seattle flights
Consider these flights traveling from Massachusetts to Seattle.
Top 7 airlines flying from Massachusetts to Seattle
Discover the top 7 airlines that operate flights from Massachusetts 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 7,457,451 searches. Data last updated October 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$172 | Average$335 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$196 | Average$443 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$217 | Average$423 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$236 | Average$462 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$254 | Average$425 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$286 | Average$482 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$298 | Average$431 | FlexibilityNo cancel fee | On-time63% |