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New Hampshire

$149+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — MHT
may. 29 — jun. 51
vie. 5/29
vie. 6/5
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 abril 29, 2026.

This SmartFares deal was found by Cheapflights users on 4/25. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/169:34 am
SEA
-
BOS
Nonstop5h 37m
Alaska Airlines
sáb. 5/237:11 pm
BOS
-
SEA
Nonstop6h 16m
Alaska Airlines
Deal found 4/25$269
This Cheapflightsfares deal was found by Cheapflights users on 4/28. 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.
mié. 6/311:35 am
SEA
-
BOS
Nonstop5h 39m
JetBlue
mar. 6/97:00 am
BOS
-
SEA
Nonstop6h 15m
JetBlue
Deal found 4/28$282
This JetBlue deal was found by Cheapflights users on 4/24. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/1611:30 am
SEA
-
BOS
Nonstop5h 37m
JetBlue
sáb. 5/237:00 am
BOS
-
SEA
Nonstop6h 17m
JetBlue
Deal found 4/24$286
This United Airlines deal was found by Cheapflights users on 4/27. 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.
mié. 9/3010:40 pm
SEA
-
BOS
1 stop7h 44m
United Airlines
sáb. 10/39:30 am
BOS
-
SEA
1 stop9h 10m
United Airlines
Deal found 4/27$287
This American Airlines deal was found by Cheapflights users on 4/27. 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.
mié. 6/106:00 am
SEA
-
BOS
1 stop9h 50m
American Airlines
mar. 6/169:01 am
BOS
-
SEA
1 stop10h 43m
American Airlines
Deal found 4/27$288
This American Airlines deal was found by Cheapflights users on 4/28. 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.
mar. 5/2610:35 pm
SEA
-
BOS
1 stop7h 06m
American Airlines
mar. 6/23:06 pm
BOS
-
SEA
1 stop10h 52m
American Airlines
Deal found 4/28$290
This Cheapflightsfares deal was found by Cheapflights users on 4/28. 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.
mar. 9/1511:55 pm
SEA
-
BOS
Nonstop5h 24m
JetBlue
mar. 9/226:59 pm
BOS
-
SEA
Nonstop6h 39m
JetBlue
Deal found 4/28$292
This Delta deal was found by Cheapflights users on 4/28. 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.
mié. 5/204:10 pm
SEA
-
BOS
Nonstop5h 30m
Delta
mar. 5/267:30 pm
BOS
-
SEA
Nonstop6h 10m
Delta
Deal found 4/28$297
This Delta deal was found by Cheapflights users on 4/27. 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.
sáb. 5/307:15 am
SEA
-
BOS
Nonstop5h 40m
Delta
sáb. 6/67:48 am
BOS
-
SEA
Nonstop6h 05m
Delta
Deal found 4/27$298
This Flighttix deal was found by Cheapflights users on 4/26. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/307:55 am
SEA
-
BOS
Nonstop5h 37m
Multiple Airlines
sáb. 6/67:00 am
BOS
-
SEA
Nonstop6h 15m
Multiple Airlines
Deal found 4/26$301
This CheapOair deal was found by Cheapflights users on 4/28. 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.
sáb. 5/233:30 pm
SEA
-
BOS
Nonstop5h 29m
Alaska Airlines
mar. 6/26:40 pm
BOS
-
SEA
1 stop18h 45m
Alaska Airlines
Deal found 4/28$302
This SmartFares deal was found by Cheapflights users on 4/26. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 6/811:52 pm
SEA
-
PWM
1 stop10h 43m
JetBlue
mar. 6/161:25 pm
PWM
-
SEA
1 stop10h 43m
JetBlue
Deal found 4/26$304

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 abril 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$269
(SmartFares)

One-way from

$149
(Delta)

Popular in

December

Cheapest in

September

Average price

$442
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. 10% potential increase in price ($48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 abril 29, 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

sáb. 6/6

12:05 pm-8:43 pm

Nonstop5h 38m

Boston Logan Intl

mar. 6/9

7:25 pm-10:49 pm

Nonstop6h 24m

$297

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

mié. 6/3

6:00 am-7:40 pm

2 stops10h 40m

Boston Logan Intl

lun. 6/8

6:45 pm-12:30 am

1 stop8h 45m

$382

SeattlePortland

SEA - PWM

SEAPWM

Seattle/Tacoma Intl

lun. 10/19

10:58 pm-9:23 am

1 stop7h 25m

Portland

sáb. 10/24

6:00 am-2:24 pm

2 stops11h 24m

$386

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

jue. 8/6

11:05 pm-9:00 am

1 stop6h 55m

Boston Logan Intl

lun. 8/10

5:25 am-1:55 pm

1 stop11h 30m

$387

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

jue. 9/24

7:25 pm-9:50 am

2 stops11h 25m

Boston Logan Intl

mar. 9/29

5:35 am-1:20 pm

2 stops10h 45m

$387

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

mar. 7/14

7:30 pm-8:00 am

2 stops9h 30m

Boston Logan Intl

lun. 7/20

7:55 am-9:30 pm

2 stops16h 35m

$388
Quickest round-trip

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

sáb. 5/9

11:00 pm-7:35 am

Nonstop5h 35m

Boston Logan Intl

sáb. 5/16

7:48 am-10:55 am

Nonstop6h 07m

$402

SeattleManchester

SEA - MHT

SEAMHT

Seattle/Tacoma Intl

mar. 5/26

11:45 pm-12:10 pm

2 stops9h 25m

Manchester

mar. 6/2

12:45 pm-12:10 am

2 stops14h 25m

$403

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

mié. 10/7

3:43 pm-12:05 am

Nonstop5h 22m

Boston Logan Intl

vie. 10/16

8:50 am-4:47 pm

1 stop10h 57m

$405

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

lun. 5/25

11:00 pm-7:35 am

Nonstop5h 35m

Boston Logan Intl

lun. 6/1

7:30 pm-10:40 pm

Nonstop6h 10m

$412

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/25

Showing 1-10 of 60 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 $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 abril 29, 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
4,314 reviews

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Crew

8.6

Overall

8.0

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.
Southwest
8.0
Very good
4,314 reviews
Southwest
8.0
Very good
4,314 reviews

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Crew

8.6

Overall

8.0

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.
American Airlines
7.1
Good
11,678 reviews
Southwest
8.0
Very good
4,314 reviews

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Crew

8.6

Overall

8.0

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?

    Delta, Southwest, and United Airlines can get you from Seattle to New Hampshire in just under 5h 38m. Your travel time can differ by up to 5h 02m. 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?

    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 $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

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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 abril 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$333Average$516FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$377Average$532FlexibilityNo cancel feeOn-time63%

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