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New Hampshire

$111+ 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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — MHT
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
1 adult, Economy
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Cheap flight deals from Seattle to New Hampshire

Cheapest flights from Seattle to New Hampshire
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 December 23, 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.
Mon 12/297:05 amSEA - BOS
1 stop9h 51mUnited Airlines
Wed 1/1412:45 pmBOS - SEA
1 stop8h 29mUnited Airlines
Deal found 12/21$357
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.
Tue 12/305:00 amSEA - BOS
1 stop9h 10mUnited Airlines
Wed 1/76:00 amBOS - SEA
1 stop8h 32mUnited Airlines
Deal found 12/21$382
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.
Tue 12/305:02 amSEA - BOS
1 stop7h 33mUnited Airlines
Tue 1/69:30 amBOS - SEA
2 stops11h 44mUnited Airlines
Deal found 12/22$426
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 12/246:00 amSEA - BOS
1 stop9h 13mUnited Airlines
Thu 1/87:55 amBOS - SEA
1 stop10h 49mUnited Airlines
Deal found 12/21$447
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 12/295:00 amSEA - BOS
1 stop11h 56mUnited Airlines
Mon 1/1210:56 amBOS - SEA
1 stop10h 31mUnited Airlines
Deal found 12/21$452
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 12/296:10 amSEA - BOS
1 stop8h 01mDelta
Mon 1/126:45 pmBOS - SEA
Nonstop6h 28mDelta
Deal found 12/21$467
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.
Wed 12/3112:44 pmSEA - BOS
1 stop7h 51mUnited Airlines
Mon 1/53:15 pmBOS - SEA
1 stop10h 57mUnited Airlines
Deal found 12/22$475
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:00 amSEA - BOS
1 stop10h 18mAmerican Airlines
Mon 1/1212:55 pmBOS - SEA
1 stop12h 25mAmerican Airlines
Deal found 12/20$480
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.
Tue 12/305:00 amSEA - BOS
1 stop9h 10mUnited Airlines
Mon 1/54:47 pmBOS - SEA
1 stop9h 25mUnited Airlines
Deal found 12/21$482
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.
Fri 12/265:02 amSEA - PWM
2 stops15h 20mUnited Airlines
Fri 1/25:30 amPWM - SEA
1 stop8h 57mUnited Airlines
Deal found 12/22$739
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.
Wed 12/247:05 amSEA - PWM
2 stops13h 17mUnited Airlines
Fri 12/262:55 pmPWM - SEA
1 stop9h 40mUnited Airlines
Deal found 12/22$757
This 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2610:52 amSEA - PWM
1 stop7h 37mUnited Airlines
Thu 1/15:30 amPWM - SEA
1 stop8h 57mUnited Airlines
Deal found 12/22$759

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 December 23, 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

January

Average price

$536
Provider with most accurate pricing for Seattle/Tacoma Intl-Boston Logan Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Boston Logan Intl flights.
Search Deals
From Seattle/Tacoma Intl to New Hampshire
Search Deals
One-way flight from Seattle/Tacoma Intl to New Hampshire
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($35 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($17 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 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 December 23, 2025.
Use the filters below to find and compare flights from Seattle to New Hampshire that are best for you.

Fly from

Seattle

Fly to

New Hampshire

Route

Depart

Return

Price

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

Fri 2/27

2:00 pm-12:18 am

1 stop7h 18m

Portland

Mon 3/2

2:35 pm-10:22 pm

1 stop10h 47m

$221

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

Tue 1/20

1:45 pm-12:20 am

1 stop7h 35m

Portland

Sat 1/24

2:35 pm-10:25 pm

1 stop10h 50m

$221

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

Wed 2/11

6:05 am-10:27 pm

2 stops13h 22m

Portland

Wed 3/4

2:35 pm-10:22 pm

1 stop10h 47m

$226

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

Wed 2/11

8:04 am-11:43 pm

2 stops12h 39m

Portland

Wed 3/4

12:17 pm-10:15 pm

2 stops12h 58m

$231

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

Tue 1/6

8:04 am-11:43 pm

2 stops12h 39m

Portland

Sat 1/10

5:30 am-3:34 pm

2 stops13h 04m

$231

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

Sat 1/10

5:25 am-10:27 pm

2 stops14h 02m

Portland

Sat 1/17

12:50 pm-10:50 pm

2 stops13h 00m

$231

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

Thu 2/19

2:00 pm-12:18 am

1 stop7h 18m

Portland

Tue 2/24

2:35 pm-10:22 pm

1 stop10h 47m

$248

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

Thu 2/19

12:43 pm-11:20 pm

1 stop7h 37m

Portland

Tue 2/24

3:05 pm-11:51 pm

1 stop11h 46m

$263

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

Wed 3/18

10:57 pm-12:19 pm

1 stop10h 22m

Portland

Tue 3/31

5:38 pm-11:30 pm

1 stop8h 52m

$266

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 1/8

8:10 am-6:57 pm

1 stop7h 47m

Boston Logan Intl

Tue 1/20

7:55 am-3:44 pm

1 stop10h 49m

$297

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 56 results
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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.
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

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

Currently, September is the cheapest month in which you can book a flight from Seattle to New Hampshire (average of $134). Flying from Seattle to New Hampshire in April is currently the most expensive (average of $916). 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.

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 December 23, 2025.
Read reviews from past customers who have flown Southwest, United Airlines, 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.
Southwest
8.0
Very good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,253 reviews
Southwest
8.0
Very good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,105 reviews
Southwest
8.0
Very good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,054 reviews
Southwest
8.0
Very good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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.

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

    Located just 11.4 mi from the city center, Seattle/Tacoma Intl (SEA) is the airport most travelers will use when flying to New Hampshire from Seattle.

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

    Delta, United Airlines, and Southwest can get you from Seattle to New Hampshire in just under 7h 18m. Your travel time can differ by up to 2h 17m. Airlines will cover a distance of 2481 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airline one-way is Alaska Airlines, with whom users have recently found tickets for as low as $118. However, be on the lookout for offers from United Airlines and American Airlines, as they are both options that can get you from Seattle to New Hampshire for a low price.

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

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

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to New Hampshire 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 Seattle to New Hampshire?

    Currently, September is the cheapest month in which you can book a flight from Seattle to New Hampshire (average of $134). Flying from Seattle to New Hampshire in April is currently the most expensive (average of $916). 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

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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.
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Top 3 airlines flying from Seattle to New Hampshire

Discover the top 3 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 December 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$328Average$442FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$333Average$557FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$377Average$516FlexibilityNo cancel feeOn-time63%

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