$183+ Cheap flights from Seattle (SEA) to New Hampshire
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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — MHT
Aug 21 — Aug 281
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to New Hampshire with Cheapflights
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Cheapest flights from Seattle to New HampshireExplore the most affordable flight options available from Seattle to New Hampshire. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 22, 2026.
Explore the most affordable flight options available from Seattle to New Hampshire. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 22, 2026.
This Flighttix deal was found by Cheapflights users on 7/17. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/144:50 pm
SEA
- BOS
1 stop9h 31m
Multiple Airlines
Sat 10/241:00 pm
BOS
- SEA
1 stop11h 15m
Multiple Airlines
Deal found 7/17![Multiple Airlines logo]()
$312
This JetBlue deal was found by Cheapflights users on 7/18. 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.
Sat 9/199:40 pm
SEA
- BOS
1 stop10h 06m
JetBlue
Sun 9/203:13 pm
BOS
- SEA
1 stop8h 29m
JetBlue
Deal found 7/18![JetBlue logo]()
$314
This American Airlines deal was found by Cheapflights users on 7/19. 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 10/2412:04 pm
SEA
- BOS
1 stop8h 51m
American Airlines
Tue 11/37:00 am
BOS
- SEA
1 stop10h 51m
American Airlines
Deal found 7/19![American Airlines logo]()
$315
This Justfly.com deal was found by Cheapflights users on 7/18. 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.
Thu 9/1711:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Tue 9/2911:20 am
BOS
- SEA
1 stop12h 22m
JetBlue
Deal found 7/18![JetBlue logo]()
$316
This Orbitz deal was found by Cheapflights users on 7/19. 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 9/263:29 pm
SEA
- BOS
Nonstop5h 25m
Multiple Airlines
Sat 10/241:00 pm
BOS
- SEA
1 stop11h 15m
Multiple Airlines
Deal found 7/19![Multiple Airlines logo]()
$319
This American Airlines deal was found by Cheapflights users on 7/19. 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 10/205:00 am
SEA
- BOS
1 stop9h 24m
American Airlines
Mon 10/266:00 am
BOS
- SEA
1 stop8h 39m
American Airlines
Deal found 7/19![American Airlines logo]()
$320
This Expedia deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/83:29 pm
SEA
- BOS
Nonstop5h 25m
Multiple Airlines
Tue 9/1511:20 am
BOS
- SEA
1 stop12h 22m
Multiple Airlines
Deal found 7/17![Multiple Airlines logo]()
$321
This Flysmarter deal was found by Cheapflights users on 7/19. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:40 pm
SEA
- BOS
Nonstop5h 19m
JetBlue
Sat 9/126:59 pm
BOS
- SEA
Nonstop6h 39m
JetBlue
Deal found 7/19![JetBlue logo]()
$322
This Super.com deal was found by Cheapflights users on 7/20. 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 8/2611:45 pm
SEA
- BOS
Nonstop5h 19m
JetBlue
Tue 9/17:09 am
BOS
- SEA
Nonstop6h 21m
JetBlue
Deal found 7/20![JetBlue logo]()
$323
This Cheapflightsfares deal was found by Cheapflights users on 7/19. 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 9/3011:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Wed 10/76:59 pm
BOS
- SEA
Nonstop6h 39m
JetBlue
Deal found 7/19![JetBlue logo]()
$324
This Trip.com deal was found by Cheapflights users on 7/21. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/55:40 pm
SEA
- BOS
1 stop9h 29m
Alaska Airlines
Sat 9/1210:03 am
BOS
- SEA
Nonstop6h 12m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$325
This American Airlines deal was found by Cheapflights users on 7/16. 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 8/189:58 pm
SEA
- MHT
1 stop9h 09m
American Airlines
Tue 8/2512:12 pm
MHT
- SEA
1 stop11h 40m
American Airlines
Deal found 7/16![American Airlines logo]()
$355
Best flights from Seattle to New HampshireDiscover carefully curated flight deals from Seattle to New Hampshire that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 22, 2026.
Discover carefully curated flight deals from Seattle to New Hampshire that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 22, 2026.
This United Airlines deal was found by Cheapflights users on 7/21. 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 9/2111:00 pm
SEA
- BOS
1 stop7h 33m
United Airlines
Fri 9/259:23 am
BOS
- SEA
1 stop9h 43m
United Airlines
Deal found 7/21![United Airlines logo]()
$341
This Southwest deal was found by Cheapflights users on 7/18. 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 9/115:15 am
SEA
- BOS
2 stops11h 25m
Southwest
Tue 9/1510:05 am
BOS
- SEA
1 stop10h 50m
Southwest
Deal found 7/18![Southwest logo]()
$347
This Alaska Airlines deal was found by Cheapflights users on 7/18. 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 9/197:40 am
SEA
- BOS
Nonstop5h 44m
Alaska Airlines
Sat 9/197:59 pm
BOS
- SEA
Nonstop6h 13m
Alaska Airlines
Deal found 7/18![Alaska Airlines logo]()
$357
This JetBlue deal was found by Cheapflights users on 7/18. 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 10/811:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Wed 10/146:59 pm
BOS
- SEA
Nonstop6h 39m
JetBlue
Deal found 7/18![JetBlue logo]()
$372
This Priceline deal was found by Cheapflights users on 7/20. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/309:40 pm
SEA
- LEB
2 stops12h 56m
Multiple Airlines
Mon 10/52:49 pm
LEB
- SEA
1 stop10h 49m
Multiple Airlines
Deal found 7/20![Multiple Airlines logo]()
$551
This Southwest deal was found by Cheapflights users on 7/21. 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 9/211:05 pm
SEA
- BOS
2 stops10h 25m
Southwest
Wed 9/93:20 pm
BOS
- SEA
2 stops10h 45m
Southwest
Deal found 7/21![Southwest logo]()
$347
This United Airlines deal was found by Cheapflights users on 7/19. 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.
Sat 9/511:04 pm
SEA
- PWM
1 stop8h 00m
United Airlines
Sat 9/123:47 pm
PWM
- SEA
1 stop10h 49m
United Airlines
Deal found 7/19![United Airlines logo]()
$365
This Southwest deal was found by Cheapflights users on 7/20. 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 9/1211:05 pm
SEA
- BOS
1 stop9h 20m
Southwest
Sat 9/191:30 pm
BOS
- SEA
2 stops11h 00m
Southwest
Deal found 7/20![Southwest logo]()
$352
This Southwest deal was found by Cheapflights users on 7/21. 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 9/217:25 pm
SEA
- BOS
2 stops11h 30m
Southwest
Fri 9/2511:15 am
BOS
- SEA
1 stop11h 20m
Southwest
Deal found 7/21![Southwest logo]()
$352
This United Airlines deal was found by Cheapflights users on 7/21. 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 10/211:14 pm
SEA
- PWM
1 stop7h 48m
United Airlines
Tue 10/65:08 pm
PWM
- SEA
1 stop8h 48m
United Airlines
Deal found 7/21![United Airlines logo]()
$409
This Southwest deal was found by Cheapflights users on 7/19. 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 8/118:30 am
SEA
- BOS
1 stop12h 55m
Southwest
Tue 8/185:35 am
BOS
- SEA
2 stops10h 45m
Southwest
Deal found 7/19![Southwest logo]()
$358
This United Airlines deal was found by Cheapflights users on 7/17. 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.
Sun 9/69:05 am
SEA
- PWM
2 stops11h 54m
United Airlines
Sun 9/136:00 am
PWM
- SEA
1 stop8h 32m
United Airlines
Deal found 7/17![United Airlines logo]()
$414
This Southwest deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/110:30 pm
SEA
- PWM
1 stop8h 25m
Southwest
Wed 9/95:45 am
PWM
- SEA
2 stops12h 15m
Southwest
Deal found 7/20![Southwest logo]()
$370
This United Airlines deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:00 am
SEA
- PWM
2 stops10h 29m
United Airlines
Mon 9/285:08 pm
PWM
- SEA
1 stop8h 45m
United Airlines
Deal found 7/21![United Airlines logo]()
$449
This Southwest deal was found by Cheapflights users on 7/17. 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 8/149:10 am
SEA
- BOS
1 stop12h 15m
Southwest
Tue 8/185:25 am
BOS
- SEA
1 stop10h 35m
Southwest
Deal found 7/17![Southwest logo]()
$372
This Southwest deal was found by Cheapflights users on 7/20. 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 9/306:40 am
SEA
- BOS
2 stops11h 45m
Southwest
Sun 10/45:25 am
BOS
- SEA
2 stops11h 20m
Southwest
Deal found 7/20![Southwest logo]()
$377
This United Airlines deal was found by Cheapflights users on 7/21. 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 11/168:10 am
SEA
- PWM
1 stop8h 08m
United Airlines
Wed 11/185:08 pm
PWM
- SEA
1 stop8h 45m
United Airlines
Deal found 7/21![United Airlines logo]()
$475
This Expedia deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/184:45 pm
SEA
- LEB
2 stops17h 51m
Multiple Airlines
Mon 8/242:49 pm
LEB
- SEA
1 stop11h 04m
Multiple Airlines
Deal found 7/20![Multiple Airlines logo]()
$710
This Southwest deal was found by Cheapflights users on 7/19. 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 9/511:00 pm
SEA
- PWM
2 stops11h 15m
Southwest
Sat 9/125:40 am
PWM
- SEA
1 stop8h 05m
Southwest
Deal found 7/19![Southwest logo]()
$378
This United Airlines deal was found by Cheapflights users on 7/16. 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.
Sat 10/318:33 am
SEA
- MHT
2 stops12h 24m
United Airlines
Wed 11/42:32 pm
MHT
- SEA
2 stops11h 30m
United Airlines
Deal found 7/16![United Airlines logo]()
$475
This Southwest deal was found by Cheapflights users on 7/19. 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 9/511:00 pm
SEA
- BOS
2 stops11h 00m
Southwest
Sat 9/125:00 am
BOS
- SEA
2 stops11h 10m
Southwest
Deal found 7/19![Southwest logo]()
$382
This United Airlines deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/98:10 am
SEA
- MHT
1 stop7h 50m
United Airlines
Tue 9/159:25 am
MHT
- SEA
2 stops15h 06m
United Airlines
Deal found 7/20![United Airlines logo]()
$483
This United Airlines deal was found by Cheapflights users on 7/19. 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 1/68:00 am
SEA
- MHT
1 stop7h 59m
United Airlines
Wed 1/131:30 pm
MHT
- SEA
1 stop9h 40m
United Airlines
Deal found 7/19![United Airlines logo]()
$491
This Southwest deal was found by Cheapflights users on 7/18. 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 9/1811:05 pm
SEA
- PWM
2 stops9h 40m
Southwest
Thu 9/2410:30 am
PWM
- SEA
2 stops10h 50m
Southwest
Deal found 7/18![Southwest logo]()
$427
This Expedia deal was found by Cheapflights users on 7/18. 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.
Sun 8/211:46 pm
SEA
- LEB
1 stop12h 27m
Multiple Airlines
Thu 8/611:00 am
LEB
- SEA
1 stop14h 53m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$940
This United Airlines deal was found by Cheapflights users on 7/18. 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 1/88:00 am
SEA
- MHT
1 stop7h 59m
United Airlines
Sat 1/161:30 pm
MHT
- SEA
1 stop9h 40m
United Airlines
Deal found 7/18![United Airlines logo]()
$529
This Expedia deal was found by Cheapflights users on 7/21. 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 8/510:19 pm
SEA
- LEB
2 stops12h 17m
Multiple Airlines
Sun 8/93:45 pm
LEB
- SEA
1 stop10h 22m
Multiple Airlines
Deal found 7/21![Multiple Airlines logo]()
$950
This Southwest deal was found by Cheapflights users on 7/21. 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 10/28:05 am
SEA
- PWM
2 stops12h 50m
Southwest
Tue 10/65:40 am
PWM
- SEA
2 stops11h 40m
Southwest
Deal found 7/21![Southwest logo]()
$458
This United Airlines deal was found by Cheapflights users on 7/18. 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 1/78:00 am
SEA
- MHT
1 stop7h 59m
United Airlines
Fri 1/151:30 pm
MHT
- SEA
1 stop9h 40m
United Airlines
Deal found 7/18![United Airlines logo]()
$529
This Southwest deal was found by Cheapflights users on 7/18. 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 9/411:05 pm
SEA
- PWM
2 stops9h 40m
Southwest
Sun 9/65:15 pm
PWM
- SEA
1 stop8h 50m
Southwest
Deal found 7/18![Southwest logo]()
$458
Last-minute flights from Seattle to New HampshireDiscover last-minute flight deals from Seattle to New Hampshire. Data last updated July 22, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to New Hampshire. Data last updated July 22, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 7/18. 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 8/1111:13 pm
SEA
- BOS
Nonstop5h 22m
Delta
Tue 8/187:35 pm
BOS
- SEA
Nonstop6h 36m
Delta
Deal found 7/18![Delta logo]()
$327
This United Airlines deal was found by Cheapflights users on 7/21. 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 8/119:05 am
SEA
- BOS
1 stop8h 57m
United Airlines
Tue 8/256:00 pm
BOS
- SEA
1 stop8h 44m
United Airlines
Deal found 7/21![United Airlines logo]()
$335
This Delta deal was found by Cheapflights users on 7/21. 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 8/113:59 pm
SEA
- BOS
Nonstop5h 18m
Delta
Tue 8/257:35 pm
BOS
- SEA
Nonstop6h 36m
Delta
Deal found 7/21![Delta logo]()
$337
This American Airlines deal was found by Cheapflights users on 7/16. 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 8/189:58 pm
SEA
- MHT
1 stop9h 09m
American Airlines
Tue 8/2512:12 pm
MHT
- SEA
1 stop11h 40m
American Airlines
Deal found 7/16![American Airlines logo]()
$355
This United Airlines deal was found by Cheapflights users on 7/17. 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 8/191:57 pm
SEA
- BOS
1 stop8h 14m
United Airlines
Mon 8/2410:38 am
BOS
- SEA
1 stop8h 29m
United Airlines
Deal found 7/17![United Airlines logo]()
$339
This American Airlines deal was found by Cheapflights users on 7/19. 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 8/255:10 am
SEA
- BOS
1 stop8h 36m
American Airlines
Tue 9/19:16 am
BOS
- SEA
1 stop10h 04m
American Airlines
Deal found 7/19![American Airlines logo]()
$314
This Super.com deal was found by Cheapflights users on 7/20. 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 8/2611:45 pm
SEA
- BOS
Nonstop5h 19m
JetBlue
Tue 9/17:09 am
BOS
- SEA
Nonstop6h 21m
JetBlue
Deal found 7/20![JetBlue logo]()
$323
This Cheapflightsfares deal was found by Cheapflights users on 7/18. 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 8/2611:40 am
SEA
- BOS
Nonstop5h 29m
JetBlue
Wed 9/27:30 pm
BOS
- SEA
Nonstop6h 23m
JetBlue
Deal found 7/18![JetBlue logo]()
$324
This United Airlines deal was found by Cheapflights users on 7/18. 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 8/266:15 pm
SEA
- BOS
1 stop8h 44m
United Airlines
Sun 8/306:07 pm
BOS
- SEA
1 stop8h 37m
United Airlines
Deal found 7/18![United Airlines logo]()
$333
This JetBlue deal was found by Cheapflights users on 7/21. 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 8/2611:40 am
SEA
- BOS
Nonstop5h 29m
JetBlue
Mon 8/3112:44 pm
BOS
- SEA
1 stop11h 24m
JetBlue
Deal found 7/21![JetBlue logo]()
$336
This Southwest deal was found by Cheapflights users on 7/21. 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 8/2611:05 pm
SEA
- BOS
1 stop6h 55m
Southwest
Tue 9/15:35 am
BOS
- SEA
2 stops10h 45m
Southwest
Deal found 7/21![Southwest logo]()
$342
This JetBlue deal was found by Cheapflights users on 7/18. 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 8/2711:40 am
SEA
- BOS
Nonstop5h 29m
JetBlue
Tue 9/112:57 pm
BOS
- SEA
1 stop11h 11m
JetBlue
Deal found 7/18![JetBlue logo]()
$330
One-way flights from Seattle to New HampshireSearch for one-way flight options from Seattle to New Hampshire. Find affordable one-way fares based on user searches. Data last updated July 22, 2026.
Search for one-way flight options from Seattle to New Hampshire. Find affordable one-way fares based on user searches. Data last updated July 22, 2026.
This Southwest deal was found by Cheapflights users on 7/21. 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 9/2110:30 pm
SEA
- PWM
1 stop8h 25m
Southwest
Deal found 7/21![Southwest logo]()
$183
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 9/247:41 pm
SEA
- PWM
3 stops43h 10m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$184
This Kiwi.com deal was found by Cheapflights users on 7/21. 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.
Mon 9/217:00 am
SEA
- BOS
2 stops26h 05m
Frontier
Deal found 7/21![Frontier logo]()
$184
This Super.com deal was found by Cheapflights users on 7/20. 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.
Sun 9/611:44 pm
SEA
- BOS
Nonstop5h 16m
JetBlue
Deal found 7/20![JetBlue logo]()
$185
This Super.com deal was found by Cheapflights users on 7/18. 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.
Thu 8/2711:45 pm
SEA
- BOS
Nonstop5h 19m
JetBlue
Deal found 7/18![JetBlue logo]()
$186
This Cheapflightsfares deal was found by Cheapflights users on 7/19. 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 9/311:40 pm
SEA
- BOS
Nonstop5h 19m
JetBlue
Deal found 7/19![JetBlue logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 7/20. 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.
Sun 9/62:37 pm
SEA
- BOS
2 stops18h 10m
Frontier
Deal found 7/20![Frontier logo]()
$188
This Southwest deal was found by Cheapflights users on 7/18. 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 8/295:30 am
SEA
- BOS
2 stops10h 00m
Southwest
Deal found 7/18![Southwest logo]()
$189
This United Airlines deal was found by Cheapflights users on 7/18. 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 8/216:10 pm
SEA
- BOS
1 stop8h 49m
United Airlines
Deal found 7/18![United Airlines logo]()
$190
This Delta deal was found by Cheapflights users on 7/18. 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 9/246:00 am
SEA
- PWM
1 stop6h 55m
Delta
Deal found 7/18![Delta logo]()
$191
This American Airlines deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2012:50 pm
SEA
- MHT
1 stop7h 46m
American Airlines
Deal found 7/19![American Airlines logo]()
$191
This Trip.com deal was found by Cheapflights users on 7/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/203:29 pm
SEA
- BOS
Nonstop5h 25m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$193
Find flight deals from Seattle to New Hampshire
Keep the following information in mind while searching for Seattle to New Hampshire flight deals. Data was last updated July 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $312 (Flighttix) |
One-way from | $183 (Southwest) |
Popular in | December |
Cheapest in | September |
Average price | $443 |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to New Hampshire 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 22, 2026.
Use the filters below to find and compare flights from Seattle to New Hampshire that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Mon 9/21
11:00 pm-9:33 am
1 stop7h 33m
Boston Logan Intl
Fri 9/25
9:23 am-4:06 pm
1 stop9h 43m
$341
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Fri 9/11
5:15 am-7:40 pm
2 stops11h 25m
Boston Logan Intl
Tue 9/15
10:05 am-5:55 pm
1 stop10h 50m
$347
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Wed 9/2
11:05 pm-12:30 pm
2 stops10h 25m
Boston Logan Intl
Wed 9/9
3:20 pm-11:05 pm
2 stops10h 45m
$347
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Sat 9/12
11:05 pm-11:25 am
1 stop9h 20m
Boston Logan Intl
Sat 9/19
1:30 pm-9:30 pm
2 stops11h 00m
$352
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Mon 9/21
7:25 pm-9:55 am
2 stops11h 30m
Boston Logan Intl
Fri 9/25
11:15 am-7:35 pm
1 stop11h 20m
$352
Quickest round-trip
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Sat 9/19
7:40 am-4:24 pm
Nonstop5h 44m
Boston Logan Intl
Sat 9/19
7:59 pm-11:12 pm
Nonstop6h 13m
$357
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Tue 8/11
8:30 am-12:25 am
1 stop12h 55m
Boston Logan Intl
Tue 8/18
5:35 am-1:20 pm
2 stops10h 45m
$358
SeattlePortland
SEA - PWM
SEAPWM
Seattle/Tacoma Intl
Sat 9/5
11:04 pm-10:04 am
1 stop8h 00m
Portland
Sat 9/12
3:47 pm-11:36 pm
1 stop10h 49m
$365
SeattlePortland
SEA - PWM
SEAPWM
Seattle/Tacoma Intl
Tue 9/1
10:30 pm-9:55 am
1 stop8h 25m
Portland
Wed 9/9
5:45 am-3:00 pm
2 stops12h 15m
$370
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Thu 10/8
11:55 pm-8:19 am
Nonstop5h 24m
Boston Logan Intl
Wed 10/14
6:59 pm-10:38 pm
Nonstop6h 39m
$372
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Seattle to New Hampshire
Have a flexible travel schedule? Discover the best time to fly to New Hampshire from Seattle with our price prediction graph.
SEA-PWM
SEA-BOS
SEA-MHT
SEA-LEB
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 New Hampshire
SEA-USNH
SEA-PWM
SEA-BOS
SEA-MHT
SEA-LEB
What is the cheapest month to book a flight from Seattle to New Hampshire?
Currently, January is the cheapest month in which you can book a flight from Seattle to New Hampshire (average of $328). Flying from Seattle to New Hampshire in May is currently the most expensive (average of $986). 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.
How much does it cost to fly round-trip from Seattle to New Hampshire?
Reviews of airlines servicing New Hampshire
Get insights into the airlines that provide service to New Hampshire. 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 New Hampshire. Reviews last updated July 22, 2026.
Read reviews from past customers who have flown Southwest and American Airlines from Seattle to New Hampshire. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Crew
8.6
Food
7.0
Comfort
8.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Crew
8.6
Food
7.0
Comfort
8.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Crew
8.6
Food
7.0
Comfort
8.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Related info for your journey
Find useful and relevant information for your journey from Seattle to New Hampshire. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Seattle to New Hampshire
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to New Hampshire by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to New Hampshire by cabin class
Find flights from Seattle to New Hampshire, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and New Hampshire flights
Browse other Seattle and New Hampshire flight options. Last updated on July 22, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Seattle to New Hampshire flights
Consider these flights traveling from Seattle to New Hampshire.
Top 2 airlines flying from Seattle to New Hampshire
Discover the top 2 airlines that operate flights from Seattle to New Hampshire. 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 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$286 | Average$546 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$377 | Average$576 | FlexibilityNo cancel fee | On-time63% |