New Hampshire

$121+ 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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — MHT
mar 22 — mar 291
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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 fevereiro 20, 2026.

This United Airlines deal was found by Cheapflights users on 2/20. 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.
ter 3/310:55 am
SEA
-
PWM
1 stop7h 14m
United Airlines
ter 3/103:44 pm
PWM
-
SEA
1 stop10h 09m
United Airlines
Deal found 2/20$241
This Alaska Airlines deal was found by Cheapflights users on 2/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 5/233:30 pm
SEA
-
BOS
Nonstop5h 29m
Alaska Airlines
qua 5/276:00 am
BOS
-
SEA
1 stop8h 59m
Alaska Airlines
Deal found 2/20$247
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 3/38:30 am
SEA
-
PWM
2 stops11h 36m
Delta
ter 3/105:23 am
PWM
-
SEA
2 stops16h 05m
Delta
Deal found 2/20$251
This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 5/1411:30 am
SEA
-
BOS
Nonstop5h 35m
JetBlue
ter 5/267:00 am
BOS
-
SEA
Nonstop6h 20m
JetBlue
Deal found 2/20$251
This CheapOair deal was found by Cheapflights users on 2/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 5/199:34 am
SEA
-
BOS
Nonstop5h 37m
Alaska Airlines
qui 5/287:11 pm
BOS
-
SEA
Nonstop6h 16m
Alaska Airlines
Deal found 2/20$252
This Cheapflightsfares deal was found by Cheapflights users on 2/18. 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.
qui 5/1411:30 am
SEA
-
BOS
Nonstop5h 35m
JetBlue
ter 5/197:00 am
BOS
-
SEA
Nonstop6h 20m
JetBlue
Deal found 2/18$256
This deal was found by Cheapflights users on 2/20. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 4/206:00 am
SEA
-
PWM
1 stop6h 57m
Delta
qua 5/62:51 pm
PWM
-
SEA
1 stop10h 40m
Delta
Deal found 2/20$259
This American Airlines deal was found by Cheapflights users on 2/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 3/181:37 pm
SEA
-
BOS
1 stop7h 28m
American Airlines
qua 3/255:31 pm
BOS
-
SEA
1 stop9h 53m
American Airlines
Deal found 2/17$260
This Delta deal was found by Cheapflights users on 2/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 3/108:25 am
SEA
-
PWM
2 stops11h 47m
Delta
ter 3/1711:45 am
PWM
-
SEA
2 stops13h 30m
Delta
Deal found 2/17$261
This Alaska Airlines deal was found by Cheapflights users on 2/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 5/199:34 am
SEA
-
BOS
Nonstop5h 37m
Alaska Airlines
sáb 5/236:40 pm
BOS
-
SEA
1 stop17h 45m
Alaska Airlines
Deal found 2/20$262
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 4/33:45 pm
SEA
-
BOS
Nonstop5h 14m
Delta
seg 4/66:45 pm
BOS
-
SEA
Nonstop6h 25m
Delta
Deal found 2/20$267
This Alaska Airlines deal was found by Cheapflights users on 2/18. 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.
qua 6/103:33 pm
SEA
-
BOS
Nonstop5h 26m
Alaska Airlines
seg 6/157:00 pm
BOS
-
SEA
Nonstop6h 29m
Alaska Airlines
Deal found 2/18$272

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 fevereiro 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$241
(United Airlines)

One-way from

$121
(Delta)

Popular in

December

Cheapest in

March

Average price

$363
Provider with most accurate pricing for Seattle/Tacoma Intl-Boston Logan Intl flight deals.
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Boston Logan Intl flights.
From Seattle/Tacoma Intl to New Hampshire
One-way flight from Seattle/Tacoma Intl to New Hampshire
Highest demand for flights based on searches. 15% potential increase in price ($66 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
Average for round-trip flights in February 2026

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 fevereiro 20, 2026.
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

qua 3/4

12:43 pm-11:20 pm

1 stop7h 37m

Portland

qua 3/11

3:44 pm-10:53 pm

1 stop10h 09m

$241

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

ter 3/3

12:43 pm-11:20 pm

1 stop7h 37m

Portland

ter 3/10

3:44 pm-10:53 pm

1 stop10h 09m

$241

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

qua 5/27

3:30 pm-11:59 pm

Nonstop5h 29m

Boston Logan Intl

ter 6/2

6:00 am-11:59 am

1 stop8h 59m

$247

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

qui 6/4

11:00 pm-7:33 am

Nonstop5h 33m

Boston Logan Intl

ter 6/9

6:35 pm-10:05 pm

Nonstop6h 30m

$272

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

qui 5/7

11:20 am-12:34 am

1 stop10h 14m

Portland

qui 5/14

2:38 pm-10:29 pm

1 stop10h 51m

$276

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

seg 4/20

6:00 am-3:57 pm

1 stop6h 57m

Portland

ter 5/12

4:48 pm-10:28 pm

1 stop8h 40m

$276

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

seg 4/20

6:00 am-3:57 pm

1 stop6h 57m

Portland

qua 5/6

4:43 pm-9:49 pm

1 stop8h 06m

$276

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

qua 3/18

7:35 pm-6:10 am

1 stop7h 35m

Boston Logan Intl

sex 3/27

6:45 pm-10:10 pm

Nonstop6h 25m

$277

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

qua 4/1

7:35 pm-6:10 am

1 stop7h 35m

Boston Logan Intl

qua 4/15

7:37 am-10:55 am

Nonstop6h 18m

$277

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

qua 3/25

7:15 am-9:22 pm

1 stop11h 07m

Boston Logan Intl

sáb 3/28

9:40 am-1:00 pm

Nonstop6h 20m

$277

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/18

Showing 1-10 of 57 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 $137). Flying from Seattle to New Hampshire in February is currently the most expensive (average of $495). 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 fevereiro 20, 2026.
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.

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

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

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

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

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

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

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

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?

    United Airlines, Alaska Airlines, and Delta can get you from Seattle to New Hampshire in just under 5h 29m. Your travel time can differ by up to 2h 08m. Airlines will cover a distance of 2487 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?

  • 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 $137). Flying from Seattle to New Hampshire in February is currently the most expensive (average of $495). 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.

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 fevereiro 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$328Average$429FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$333Average$543FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$377Average$516FlexibilityNo cancel feeOn-time63%

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