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$111+ Cheap flights from New Hampshire to Seattle (SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
MHT — SEA
Jan 21 — Jan 281
Wed 1/21
Wed 1/28
1 adult, Economy
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Cheap flight deals from New Hampshire to Seattle

Cheapest flights from New Hampshire to Seattle
Explore the most affordable flight options available from New Hampshire to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 22, 2025.

This United Airlines deal was found by Cheapflights users on 12/21. 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 12/2411:00 amBOS - SEA
1 stop10h 45mUnited Airlines
Wed 1/79:25 amSEA - BOS
1 stop9h 17mUnited Airlines
Deal found 12/21$443
This United Airlines deal was found by Cheapflights users on 12/20. 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.
Thu 12/251:40 pmBOS - SEA
1 stop10h 55mUnited Airlines
Tue 1/611:45 pmSEA - BOS
1 stop8h 27mUnited Airlines
Deal found 12/20$452
This Kiwi.com deal was found by Cheapflights users on 12/20. 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.
Thu 12/2511:49 amBOS - SEA
1 stop8h 29mSun Country Air
Sun 12/286:28 pmSEA - BOS
1 stop13h 23mSun Country Air
Deal found 12/20$496
This United Airlines deal was found by Cheapflights users on 12/20. 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.
Thu 12/251:40 pmBOS - SEA
1 stop10h 55mUnited Airlines
Sun 12/287:12 pmSEA - BOS
1 stop9h 58mUnited Airlines
Deal found 12/20$537
This United Airlines deal was found by Cheapflights users on 12/20. 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.
Tue 12/234:47 pmBOS - SEA
1 stop9h 25mUnited Airlines
Sun 1/411:15 pmSEA - BOS
1 stop8h 22mUnited Airlines
Deal found 12/20$541
This United Airlines deal was found by Cheapflights users on 12/22. 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 12/2511:00 amBOS - SEA
1 stop10h 45mUnited Airlines
Mon 12/295:00 amSEA - BOS
1 stop9h 10mUnited Airlines
Deal found 12/22$543
This United Airlines deal was found by Cheapflights users on 12/20. 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.
Thu 12/251:40 pmBOS - SEA
1 stop10h 55mUnited Airlines
Fri 1/211:15 pmSEA - BOS
1 stop8h 22mUnited Airlines
Deal found 12/20$557
This United Airlines deal was found by Cheapflights users on 12/21. 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 12/228:00 amBOS - SEA
1 stop11h 52mUnited Airlines
Mon 1/511:59 pmSEA - BOS
1 stop7h 53mUnited Airlines
Deal found 12/21$567
This United Airlines deal was found by Cheapflights users on 12/21. 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 12/2411:00 amBOS - SEA
1 stop10h 45mUnited Airlines
Fri 12/267:05 amSEA - BOS
1 stop9h 51mUnited Airlines
Deal found 12/21$572
This United Airlines deal was found by Cheapflights users on 12/20. 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.
Thu 12/251:40 pmBOS - SEA
1 stop10h 55mUnited Airlines
Sat 1/311:59 pmSEA - BOS
1 stop8h 09mUnited Airlines
Deal found 12/20$577
This Delta deal was found by Cheapflights users on 12/21. 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.
Sun 12/214:48 pmPWM - SEA
2 stops10h 32mDelta
Thu 1/81:45 pmSEA - PWM
1 stop7h 35mDelta
Deal found 12/21$608
This Delta deal was found by Cheapflights users on 12/21. 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.
Mon 12/224:48 pmPWM - SEA
1 stop8h 37mDelta
Fri 12/268:05 amSEA - PWM
2 stops11h 45mDelta
Deal found 12/21$653

Find flight deals from New Hampshire to Seattle

Keep the following information in mind while searching for New Hampshire to Seattle flight deals. Data was last updated December 22, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$221
(Delta)

One-way from

$111
(Delta)

Popular in

December

Cheapest in

March

Average price

$508
Provider with most accurate pricing for Boston Logan Intl-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Seattle/Tacoma Intl flights.
Search Deals
From New Hampshire to Seattle/Tacoma Intl
Search Deals
One-way flight from New Hampshire to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from New Hampshire to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 22, 2025.
Use the filters below to find and compare flights from New Hampshire to Seattle that are best for you.

Fly from

New Hampshire

Fly to

Seattle

Route

Depart

Return

Price

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Sat 1/24

2:35 pm-10:25 pm

1 stop10h 50m

Seattle/Tacoma Intl

Fri 1/30

1:45 pm-12:20 am

1 stop7h 35m

$221

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Mon 2/2

2:35 pm-10:25 pm

1 stop10h 50m

Seattle/Tacoma Intl

Thu 2/5

1:45 pm-12:20 am

1 stop7h 35m

$221

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Thu 1/22

2:35 pm-10:25 pm

1 stop10h 50m

Seattle/Tacoma Intl

Mon 1/26

1:45 pm-12:20 am

1 stop7h 35m

$221

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Sun 1/18

2:35 pm-10:25 pm

1 stop10h 50m

Seattle/Tacoma Intl

Sat 1/24

11:10 pm-11:20 am

2 stops9h 10m

$226

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Thu 1/29

6:00 am-2:21 pm

2 stops11h 21m

Seattle/Tacoma Intl

Tue 2/3

11:10 pm-12:03 pm

1 stop9h 53m

$226

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Thu 1/22

12:46 pm-10:20 pm

2 stops12h 34m

Seattle/Tacoma Intl

Mon 1/26

7:35 am-10:54 pm

2 stops12h 19m

$231

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Fri 1/23

10:30 am-4:01 pm

1 stop8h 31m

Seattle/Tacoma Intl

Fri 1/30

7:30 pm-8:10 am

1 stop9h 40m

$272

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Thu 1/29

7:55 am-3:44 pm

1 stop10h 49m

Seattle/Tacoma Intl

Mon 2/2

8:10 am-6:57 pm

1 stop7h 47m

$272

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 2/25

11:00 am-6:26 pm

1 stop10h 26m

Seattle/Tacoma Intl

Fri 2/27

7:10 pm-5:52 am

1 stop7h 42m

$272

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Fri 1/16

9:30 am-4:01 pm

1 stop9h 31m

Seattle/Tacoma Intl

Sun 1/25

9:25 am-9:42 pm

1 stop9h 17m

$272

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 55 results
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Best time to book a flight from New Hampshire to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from New Hampshire with our price prediction graph.
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 New Hampshire to Seattle

What is the cheapest month to book a flight from New Hampshire to Seattle?

Currently, October is the cheapest month in which you can book a flight from New Hampshire to Seattle (average of $198). Flying from New Hampshire to Seattle in December is currently the most expensive (average of $486). 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 NH to SEA?

Find hourly flight availability from New Hampshire 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 December 22, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 49% on flights from New Hampshire to Seattle by exploring options for tickets in the evening.

How much does it cost to fly round-trip from New Hampshire to Seattle?

Related info for your journey

Find useful and relevant information for your journey from New Hampshire to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from New Hampshire?

    Seattle/Tacoma Intl (SEA) is the airport you will fly into if you book a flight from New Hampshire to Seattle. It is only a 11.4 mi journey from Seattle/Tacoma Intl (SEA) to Seattle’s city center.

  • How long is the flight from New Hampshire to Seattle?

    Airlines like Delta, United Airlines, and Southwest fly from New Hampshire to Seattle in about 8h 31m. The time it takes to get you to your destination can typically vary by up to 3h 04m. There are 2487 mi between New Hampshire and Seattle. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from New Hampshire to Seattle one-way?

    The cheapest airlines for a one-way flight from New Hampshire to Seattle are American Airlines ($162), Southwest ($168), and United Airlines ($171).

  • What are the most popular routes from New Hampshire to Seattle?

    The most popular flight routes from New Hampshire to Seattle are Boston Logan Intl - Seattle/Tacoma Intl, Manchester - Seattle/Tacoma Intl and Portland - Seattle/Tacoma Intl.

  • Can I find deals for flights from New Hampshire to Seattle that include hotel bookings?

    Yes. In addition to deals on New Hampshire to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from New Hampshire to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from New Hampshire to Seattle.

  • Can I find deals for business class flights from New Hampshire to Seattle?

    Yes. Cheapflights offers flight deals from New Hampshire to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from New Hampshire to Seattle?

    Currently, October is the cheapest month in which you can book a flight from New Hampshire to Seattle (average of $198). Flying from New Hampshire to Seattle in December is currently the most expensive (average of $486). 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.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Kent
Tukwila
Cle Elum
Marysville
Leavenworth
Fife
Aberdeen
Shoreline
Centralia
Federal Way

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Alternative routes for New Hampshire to Seattle

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Top 4 airlines flying from New Hampshire to Seattle

Discover the top 4 airlines that operate flights from New Hampshire to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$342Average$422FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$344Average$525FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$347Average$787FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$379Average$458FlexibilityNo cancel feeOn-time63%

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