New Hampshire

$146+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — MHT
May 18 — May 251
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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 April 18, 2026.

This Cheapflightsfares deal was found by Cheapflights users on 4/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/2311:35 am
SEA
-
BOS
Nonstop5h 39m
JetBlue
Wed 5/277:00 am
BOS
-
SEA
Nonstop6h 17m
JetBlue
Deal found 4/16$282
This KAYAK deal was found by Cheapflights users on 4/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1911:30 am
SEA
-
BOS
Nonstop5h 37m
JetBlue
Wed 5/277:00 am
BOS
-
SEA
Nonstop6h 17m
JetBlue
Deal found 4/13$285
This American Airlines deal was found by Cheapflights users on 4/14. 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 5/2610:35 pm
SEA
-
BOS
1 stop10h 11m
American Airlines
Wed 6/35:57 pm
BOS
-
SEA
1 stop10h 02m
American Airlines
Deal found 4/14$287
This flygcity.se deal was found by Cheapflights users on 4/15. 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 flygcity.se is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3011:35 am
SEA
-
BOS
Nonstop5h 39m
JetBlue
Sat 6/67:00 am
BOS
-
SEA
Nonstop6h 15m
JetBlue
Deal found 4/15$289
This American Airlines deal was found by Cheapflights users on 4/15. 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 5/121:19 pm
SEA
-
PWM
1 stop7h 58m
American Airlines
Wed 5/136:01 pm
PWM
-
SEA
1 stop9h 35m
American Airlines
Deal found 4/15$291
This Cheapflightsfares deal was found by Cheapflights users on 4/13. 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.
Tue 5/1911:30 am
SEA
-
BOS
Nonstop5h 37m
JetBlue
Mon 5/257:00 am
BOS
-
SEA
Nonstop6h 17m
JetBlue
Deal found 4/13$292
This flugladen.de deal was found by Cheapflights users on 4/16. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/304:47 pm
SEA
-
BOS
1 stop9h 57m
Multiple Airlines
Sat 6/67:00 am
BOS
-
SEA
Nonstop6h 15m
Multiple Airlines
Deal found 4/16$293
This KAYAK deal was found by Cheapflights users on 4/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1911:30 am
SEA
-
BOS
Nonstop5h 37m
JetBlue
Sun 5/247:00 am
BOS
-
SEA
Nonstop6h 17m
JetBlue
Deal found 4/13$295
This Delta deal was found by Cheapflights users on 4/14. 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 5/56:00 am
SEA
-
PWM
2 stops14h 23m
Delta
Tue 5/122:38 pm
PWM
-
SEA
1 stop8h 32m
Delta
Deal found 4/14$296
This Delta deal was found by Cheapflights users on 4/13. 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.
Wed 5/2011:00 pm
SEA
-
BOS
Nonstop5h 35m
Delta
Wed 5/2711:55 am
BOS
-
SEA
Nonstop6h 10m
Delta
Deal found 4/13$297
This JetBlue deal was found by Cheapflights users on 4/16. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1711:30 am
SEA
-
BOS
Nonstop5h 35m
JetBlue
Tue 5/267:00 am
BOS
-
SEA
Nonstop6h 17m
JetBlue
Deal found 4/16$298
This flygcity.se deal was found by Cheapflights users on 4/15. 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 flygcity.se is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:35 am
SEA
-
BOS
Nonstop5h 39m
JetBlue
Wed 6/37:00 am
BOS
-
SEA
Nonstop6h 17m
JetBlue
Deal found 4/15$299

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 April 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$282
(Cheapflightsfares)

One-way from

$146
(American Airlines)

Popular in

December

Cheapest in

September

Average price

$441
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. 11% potential increase in price ($49 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Average for round-trip flights in April 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 April 18, 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

Tue 5/5

3:21 pm-11:59 pm

Nonstop5h 38m

Boston Logan Intl

Wed 5/6

4:33 pm-7:55 pm

Nonstop6h 22m

$297

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

Tue 5/26

11:59 pm-11:55 am

2 stops8h 56m

Portland

Wed 6/3

2:05 pm-12:10 am

2 stops13h 05m

$351
Quickest round-trip

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 5/26

11:00 pm-7:35 am

Nonstop5h 35m

Boston Logan Intl

Wed 6/3

7:48 am-10:53 am

Nonstop6h 05m

$357

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 6/6

6:15 am-9:05 pm

1 stop11h 50m

Boston Logan Intl

Wed 6/10

12:50 pm-11:10 pm

2 stops13h 20m

$368

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 6/13

7:35 pm-9:50 am

2 stops11h 15m

Boston Logan Intl

Tue 6/16

3:45 pm-12:20 am

1 stop11h 35m

$383

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 5/30

11:55 pm-10:55 am

1 stop8h 00m

Boston Logan Intl

Sat 6/6

4:50 pm-1:10 am

2 stops11h 20m

$385

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 6/3

11:45 pm-10:55 am

1 stop8h 10m

Boston Logan Intl

Sat 6/6

4:50 pm-1:10 am

2 stops11h 20m

$385

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 7/1

11:44 pm-8:00 am

Nonstop5h 16m

Boston Logan Intl

Thu 7/9

7:24 pm-10:49 pm

Nonstop6h 25m

$387

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

Sat 6/6

9:35 am-12:43 am

2 stops12h 08m

Portland

Mon 6/15

2:59 pm-10:58 pm

1 stop10h 59m

$396

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 5/5

7:36 pm-10:20 am

2 stops11h 44m

Boston Logan Intl

Wed 5/6

3:00 pm-10:47 pm

1 stop10h 47m

$402

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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 $98). Flying from Seattle to New Hampshire in February is currently the most expensive (average of $483). 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 April 18, 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.

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

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.

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

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.

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

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?

    Alaska Airlines, Delta, and Southwest can get you from Seattle to New Hampshire in just under 5h 38m. Your travel time can differ by up to 6h 12m. 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?

  • 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 $98). Flying from Seattle to New Hampshire in February is currently the most expensive (average of $483). 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

Browse thousands of different options on Cheapflights for your next trip

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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 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 April 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$333Average$516FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$377Average$532FlexibilityNo cancel feeOn-time63%

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