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New Hampshire

$119+ 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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — MHT
Apr 23 — Apr 301
Thu 4/23
Thu 4/30
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 March 24, 2026.

This American Airlines deal was found by Cheapflights users on 3/24. 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 4/1410:47 pm
SEA
-
PWM
1 stop8h 36m
American Airlines
Tue 4/213:39 pm
PWM
-
SEA
2 stops11h 57m
American Airlines
Deal found 3/24$251
This United Airlines deal was found by Cheapflights users on 3/19. 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 4/1810:55 pm
SEA
-
BOS
1 stop8h 20m
United Airlines
Sat 4/255:20 pm
BOS
-
SEA
1 stop9h 39m
United Airlines
Deal found 3/19$257
This Southwest deal was found by Cheapflights users on 3/24. 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 4/2011:55 pm
SEA
-
BOS
1 stop8h 05m
Southwest
Tue 4/282:25 pm
BOS
-
SEA
2 stops12h 10m
Southwest
Deal found 3/24$262
This Southwest deal was found by Cheapflights users on 3/23. 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 5/211:55 pm
SEA
-
BOS
1 stop8h 00m
Southwest
Wed 5/66:20 pm
BOS
-
SEA
1 stop8h 50m
Southwest
Deal found 3/23$264
This United Airlines deal was found by Cheapflights users on 3/24. 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 5/410:53 pm
SEA
-
PWM
1 stop8h 30m
United Airlines
Sat 5/93:39 pm
PWM
-
SEA
1 stop11h 20m
United Airlines
Deal found 3/24$269
This Cheapflightsfares deal was found by Cheapflights users on 3/20. 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.
Wed 5/2011:30 am
SEA
-
BOS
Nonstop5h 35m
JetBlue
Tue 6/27:00 am
BOS
-
SEA
Nonstop6h 15m
JetBlue
Deal found 3/20$272
This United Airlines deal was found by Cheapflights users on 3/19. 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 6/37:40 am
SEA
-
BOS
1 stop8h 34m
United Airlines
Tue 6/96:35 pm
BOS
-
SEA
1 stop8h 24m
United Airlines
Deal found 3/19$276
This Southwest deal was found by Cheapflights users on 3/19. 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 5/56:00 am
SEA
-
BOS
1 stop7h 05m
Southwest
Tue 5/56:20 pm
BOS
-
SEA
1 stop8h 50m
Southwest
Deal found 3/19$277
This Southwest deal was found by Cheapflights users on 3/19. 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 4/287:10 pm
SEA
-
BOS
2 stops10h 05m
Southwest
Tue 5/56:20 pm
BOS
-
SEA
1 stop8h 50m
Southwest
Deal found 3/19$282
This United Airlines deal was found by Cheapflights users on 3/20. 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 4/162:39 pm
SEA
-
BOS
1 stop7h 20m
United Airlines
Wed 4/2912:30 pm
BOS
-
SEA
1 stop9h 30m
United Airlines
Deal found 3/20$283
This Southwest deal was found by Cheapflights users on 3/23. 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 5/206:00 am
SEA
-
BOS
1 stop9h 35m
Southwest
Tue 6/26:20 pm
BOS
-
SEA
1 stop8h 50m
Southwest
Deal found 3/23$284
This Southwest deal was found by Cheapflights users on 3/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/39:20 am
SEA
-
BOS
1 stop11h 45m
Southwest
Tue 6/93:45 pm
BOS
-
SEA
2 stops11h 45m
Southwest
Deal found 3/22$285

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 March 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$251
(American Airlines)

One-way from

$119
(United Airlines)

Popular in

December

Cheapest in

September

Average price

$347
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. 13% potential increase in price ($61 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 March 2026
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 March 24, 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

Price

Cheapest round-trip

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 9/9

10:00 pm-6:35 am

Nonstop5h 35m

Boston Logan Intl

Sat 9/12

6:35 pm-10:05 pm

Nonstop6h 30m

$297

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

Fri 5/29

11:05 pm-1:58 pm

2 stops11h 53m

Portland

Wed 6/3

2:05 pm-11:43 pm

2 stops12h 38m

$311

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 5/5

6:00 am-4:05 pm

1 stop7h 05m

Boston Logan Intl

Tue 5/12

2:25 pm-11:35 pm

2 stops12h 10m

$322
Quickest round-trip

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 9/9

10:00 pm-6:35 am

Nonstop5h 35m

Boston Logan Intl

Fri 9/11

11:00 am-2:23 pm

Nonstop6h 23m

$332

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 5/7

6:15 pm-8:05 am

2 stops10h 50m

Boston Logan Intl

Tue 5/12

6:20 pm-12:10 am

1 stop8h 50m

$337

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

Thu 5/7

5:30 am-4:07 pm

1 stop7h 37m

Portland

Thu 5/14

2:38 pm-10:45 pm

1 stop11h 07m

$348

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 7/3

5:30 am-6:10 pm

2 stops9h 40m

Boston Logan Intl

Tue 7/7

4:45 pm-11:30 pm

1 stop9h 45m

$362

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

Tue 5/5

10:52 am-11:59 pm

2 stops10h 07m

Portland

Wed 5/6

3:39 pm-11:59 pm

1 stop11h 20m

$406

SeattleManchester

SEA - MHT

SEAMHT

Seattle/Tacoma Intl

Tue 5/5

8:10 am-6:56 pm

1 stop7h 46m

Manchester

Wed 5/6

2:36 pm-1:12 am

2 stops13h 36m

$408

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

Fri 8/28

11:00 pm-11:45 am

2 stops9h 45m

Portland

Sat 9/12

5:40 am-10:45 am

1 stop8h 05m

$414

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 57 resultsSorted by cheapest first
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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 May is currently the most expensive (average of $529). 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 March 24, 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.
Southwest
8.0
Very good
4,331 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,331 reviews
Southwest
8.0
Very good
4,331 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,491 reviews
Southwest
8.0
Very good
4,331 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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, Southwest, and JetBlue can get you from Seattle to New Hampshire in just under 5h 35m. Your travel time can differ by up to 2h 45m. 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 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 May is currently the most expensive (average of $529). 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.

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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 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 March 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$333Average$516FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$377Average$586FlexibilityNo cancel feeOn-time63%

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