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New Hampshire

$138+ 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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — MHT
Aug 22 — Aug 291
Fri 8/22
Fri 8/29
1 adult, Economy
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Cheap 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 August 17, 2025.

Round-trip from

$187
(Alaska Airlines)

One-way from

$138
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$437
From Seattle/Tacoma Intl to New Hampshire
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One-way flight from Seattle/Tacoma Intl to New Hampshire
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High demand for flights, 6% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 August 17, 2025.

This Alaska Airlines deal was found by Cheapflights users on 8/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/253:35 pmSEA - BOS
Nonstop5h 24mAlaska Airlines
Wed 10/297:00 amBOS - SEA
Nonstop6h 35mAlaska Airlines
Deal found 8/17$187
This JetBlue deal was found by Cheapflights users on 8/16. 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.
Wed 9/2411:30 amSEA - BOS
Nonstop5h 53mJetBlue
Sun 10/57:00 amBOS - SEA
Nonstop6h 19mJetBlue
Deal found 8/16$197
This JetBlue deal was found by Cheapflights users on 8/16. 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.
Sat 10/111:10 pmSEA - BOS
Nonstop5h 36mJetBlue
Sat 10/188:20 amBOS - SEA
Nonstop6h 39mJetBlue
Deal found 8/16$198
This lastminute.com deal was found by Cheapflights users on 8/15. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/411:30 amSEA - BOS
Nonstop5h 53mJetBlue
Sun 10/128:20 amBOS - SEA
Nonstop6h 39mJetBlue
Deal found 8/15$204
This Hawaiian Airlines deal was found by Cheapflights users on 8/17. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2611:10 pmSEA - BOS
Nonstop5h 19mHawaiian Airlines
Wed 10/297:00 amBOS - SEA
Nonstop6h 35mHawaiian Airlines
Deal found 8/17$207
This Expedia deal was found by Cheapflights users on 8/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/142:22 pmSEA - BOS
2 stops17h 26mMultiple Airlines
Tue 11/187:00 amBOS - SEA
Nonstop6h 35mMultiple Airlines
Deal found 8/16$215
This American Airlines deal was found by Cheapflights users on 8/15. 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 9/3011:05 pmSEA - BOS
1 stop10h 18mAmerican Airlines
Tue 10/73:55 pmBOS - SEA
1 stop9h 23mAmerican Airlines
Deal found 8/15$216
This JetBlue deal was found by Cheapflights users on 8/15. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/151:10 pmSEA - BOS
Nonstop5h 36mJetBlue
Wed 10/228:20 amBOS - SEA
Nonstop6h 39mJetBlue
Deal found 8/15$217
This American Airlines deal was found by Cheapflights users on 8/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1110:49 pmSEA - BOS
1 stop8h 25mAmerican Airlines
Sat 10/186:00 amBOS - SEA
1 stop8h 03mAmerican Airlines
Deal found 8/16$218
This Southwest deal was found by Cheapflights users on 8/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/139:15 amSEA - BOS
1 stop11h 20mSouthwest
Sat 9/205:35 amBOS - SEA
1 stop9h 05mSouthwest
Deal found 8/16$222
This Expedia deal was found by Cheapflights users on 8/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/811:59 pmSEA - PWM
1 stop10h 22mJetBlue
Tue 9/162:17 pmPWM - SEA
1 stop11h 03mJetBlue
Deal found 8/15$261
This Priceline deal was found by Cheapflights users on 8/16. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/511:56 pmSEA - PWM
1 stop10h 26mJetBlue
Thu 9/112:17 pmPWM - SEA
1 stop11h 03mJetBlue
Deal found 8/16$262

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 August 17, 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

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 10/25

3:35 pm-11:59 pm

Nonstop5h 24m

Boston Logan Intl

Sat 11/1

7:00 am-10:35 am

Nonstop6h 35m

$187

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 10/21

3:35 pm-11:59 pm

Nonstop5h 24m

Boston Logan Intl

Sat 11/1

7:00 am-10:35 am

Nonstop6h 35m

$187

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 10/22

3:35 pm-11:59 pm

Nonstop5h 24m

Boston Logan Intl

Wed 10/29

7:00 am-10:35 am

Nonstop6h 35m

$187

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 10/27

11:10 pm-7:29 am

Nonstop5h 19m

Boston Logan Intl

Sat 11/1

7:00 am-10:35 am

Nonstop6h 35m

$187

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 9/30

11:30 am-8:23 pm

Nonstop5h 53m

Boston Logan Intl

Wed 10/8

8:20 am-11:59 am

Nonstop6h 39m

$197

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 10/21

3:35 pm-11:59 pm

Nonstop5h 24m

Boston Logan Intl

Thu 10/23

7:20 am-10:49 am

Nonstop6h 29m

$197

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 10/15

1:10 pm-9:46 pm

Nonstop5h 36m

Boston Logan Intl

Thu 10/23

8:20 am-11:59 am

Nonstop6h 39m

$197

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 10/17

1:10 pm-9:46 pm

Nonstop5h 36m

Boston Logan Intl

Wed 10/22

8:20 am-11:59 am

Nonstop6h 39m

$197

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 10/18

1:10 pm-9:46 pm

Nonstop5h 36m

Boston Logan Intl

Thu 10/23

8:20 am-11:59 am

Nonstop6h 39m

$197

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 10/25

3:35 pm-11:59 pm

Nonstop5h 24m

Boston Logan Intl

Fri 10/31

7:00 am-10:35 am

Nonstop6h 35m

$197

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 54 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
No data available for this route at this time. Please check back soon.

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 August 17, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and United Airlines from Seattle to New Hampshire. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,919 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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.

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

    The cheapest airline one-way is Sun Country Air, with whom users have recently found tickets for as low as $152. However, be on the lookout for offers from American Airlines and United 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, January is the cheapest month in which you can book a flight from Seattle to New Hampshire (average of $334). Flying from Seattle to New Hampshire in April is currently the most expensive (average of $395). 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

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Top 4 airlines flying from Seattle to New Hampshire

Discover the top 4 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 August 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$336Average$536FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$346Average$453FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$412Average$536FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$487Average$846FlexibilityNo cancel feeOn-time75%

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