$120 Find Cheap Flights from Seattle to New Hampshire

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to New Hampshire departing on 9/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to New Hampshire

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to New Hampshire, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to New Hampshire, as well as popular online travel agencies
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Cheap Flights from Seattle to New Hampshire

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boston
Boston1 stop$316
Lebanon
Lebanon1 stop$619
Portland
Portland1 stop$239
Boston
Boston1 stop$316
Lebanon
Lebanon1 stop$619
Portland
Portland1 stop$239

Book Cheap Seattle to New Hampshire Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to New Hampshire that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to New Hampshire

Wed, Sep 9 - Wed, Sep 23
American Airlines Logo
5:30 am - 6:46 pm
SEA
-
PWM
10h 16m
1 stop
American Airlines Logo
5:24 pm - 12:11 am
PWM
-
SEA
9h 47m
1 stop
$239American Airlines
Wed, Sep 9 - Wed, Sep 23
Southwest Logo
10:30 pm - 9:50 am
SEA
-
PWM
8h 20m
1 stop
Southwest Logo
1:05 pm - 8:25 pm
PWM
-
SEA
10h 20m
2 stops
$245Southwest
Sat, Sep 26 - Tue, Oct 6
American Airlines Logo
8:24 am - 10:13 pm
SEA
-
PWM
10h 49m
1 stop
American Airlines Logo
6:00 am - 11:40 am
PWM
-
SEA
8h 40m
1 stop
$262American Airlines
Wed, Sep 9 - Wed, Sep 23
Southwest Logo
7:10 am - 9:10 pm
SEA
-
PWM
11h 00m
2 stops
Southwest Logo
1:05 pm - 8:25 pm
PWM
-
SEA
10h 20m
2 stops
$313Southwest
Fri, Sep 18 - Mon, Sep 21
JetBlue Logo
9:40 pm - 10:46 am
SEA
-
BOS
10h 06m
1 stop
JetBlue Logo
6:59 pm - 10:38 pm
BOS
-
SEA
6h 39mnonstop
$316JetBlue
Sat, Jul 4 - Tue, Aug 4
Delta Logo
7:29 am - 4:00 pm
SEA
-
BOS
5h 31mnonstop
Delta Logo
7:35 pm - 11:11 pm
BOS
-
SEA
6h 36mnonstop
$317Delta
Sat, Sep 19 - Tue, Sep 22
JetBlue Logo
11:55 pm - 8:19 am
SEA
-
BOS
5h 24mnonstop
JetBlue Logo
1:00 pm - 8:42 pm
BOS
-
SEA
10h 42m
1 stop
$320JetBlue
Tue, Sep 8 - Wed, Sep 16
Alaska Airlines Logo
6:51 pm - 6:09 am
SEA
-
BOS
8h 18m
1 stop
Alaska Airlines Logo
7:59 pm - 11:12 pm
BOS
-
SEA
6h 13mnonstop
$322Alaska Airlines
Fri, Oct 16 - Tue, Oct 20
Delta Logo
11:05 pm - 11:53 am
SEA
-
PWM
9h 48m
1 stop
Delta Logo
2:35 pm - 10:12 pm
PWM
-
SEA
10h 37m
1 stop
$325Delta
Thu, Sep 10 - Tue, Sep 15
Alaska Airlines Logo
6:51 pm - 6:09 am
SEA
-
BOS
8h 18m
1 stop
Alaska Airlines Logo
5:42 pm - 10:39 pm
BOS
-
SEA
7h 57m
1 stop
$327Alaska Airlines
Booking Insights

KAYAK's insights & trends for Seattle to New Hampshire flights

Get data-powered insights and trends into flights from Seattle to New Hampshire to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Seattle to New Hampshire?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to New Hampshire departing in September.

What is the cheapest time of day to fly to New Hampshire?

The average price for all round-trip flights from Seattle to New Hampshire depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to New Hampshire is generally in the afternoon, when round-trip flights cost $254 on average. Morning departures are around 22% more expensive than evening flights, on average. The most expensive time of day to fly to New Hampshire is generally in the morning, which is peak travel time and where the average cost of a ticket is $473.

What is the cheapest month to fly from Seattle to New Hampshire?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to New Hampshire, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to New Hampshire is September, when tickets cost $98 (return) on average. On the other hand, the most expensive months are February and August, when the average cost of round-trip tickets is $483 and $466 respectively.

What’s the cheapest day of the week to fly from Seattle to New Hampshire?

The average price of all round-trip flights from Seattle to New Hampshire clicked on KAYAK for each day over the last 12 months.

When flying from Seattle to New Hampshire, you should consider leaving on a Wednesday and avoid Sundays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Wednesdays and the most expensive ones on Mondays.

How far in advance should I book a flight from Seattle to New Hampshire?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to New Hampshire, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to New Hampshire, you should book around 4 weeks before departure, which saves you about 40% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$120
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly with an average 3% increase in price.
Flight from Seattle to Portland

FAQs - booking New Hampshire flights

  • How does KAYAK find such low prices on flights from Seattle to New Hampshire?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to New Hampshire.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to New Hampshire?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Seattle to New Hampshire is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to New Hampshire?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Seattle to New Hampshire with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to New Hampshire?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Seattle to New Hampshire up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to New Hampshire

  • Looking for a cheap flight? 25% of our users found tickets from Seattle to the following destinations at these prices or less: Boston $225 one-way - $383 round-trip

Reviews of the top airlines flying from Seattle to New Hampshire

 
See real verified KAYAK customer reviews for airlines flying from Seattle to New Hampshire. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to New Hampshire? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
SouthwestOverall score based on 4235 reviews
8.6Crew
8.0Comfort
8.1Boarding
7.0Food
7.5Entertainment
Airline reviews

Flight was delayed over 3 hours. Planes were dirty. Staff indifferent. And they serve vegan pretzels as snacks.

2.0 MediocreMatthew, Jun 2026
CVG - MDW
Read more Southwest reviews

Flight was delayed over 3 hours. Planes were dirty. Staff indifferent. And they serve vegan pretzels as snacks.

It was great. The gate staff were very helpful in Portland when my son forgot his rolling bag and had to go back to get it just in time to make it on the plane. We really appreciate that. Great job!

Airline is not very senior friendly. Flights are late, forcing us to run to the connecting flight. Food is awful. Wish they would go back to pretzels and peanuts. During flight, pressurization isn’t quite right and all of our ears get plugged. Everything is nickel and dime, charging for boarding, seat selection and legroom. While a screen at the desk in the gate area says check your roll on bag now for free due to space limitation, the employee at the desk will not check the bag without a $100 fee. Insane.

Kayak could’ve posted the correct gate number. Almost missed my flight.

Slow boarding, limited food and drink portions. Bad delays and turbulence

there were two flight attendants that were up front...that were the best! They get KUDOs for making my trip only fantastic. Tell them Jeff said that!

OKay. I sat in the back of the plane and it was really loud between babies and little kids, and adults who.like to talk a lot and loudly most of the flight.

Flight coming out of Buffalo was delayed, so we had to be rescheduled on another flight from Baltimore to Phoenix which means we had a long layover and got home 3.5 hours late. Shuttle to parking stopped at 10pm, so we had to pay for an Uber to the parking lot and got charged an extra day of parking since it was after midnight. Not the best experience. Long day!

Was fine, delayed and feels like southwest is always late

I don't know why flying out of Sarasota requires two plane changes.

Awfully rude American worker at door when we started boarding flight. Then, walk into a blazing hot airplane with no air conditioning until twenty minutes into the flight. Free entertainment was non existent! My husband, along with the fellow passenger in our row, and I could not get entertainment to work, no WIFI! Really?? Been flying American a long time. Was very disappointed.

Flight was delayed by 6 hours... the level of incompetence was truly astounding. I won't be flying American Airlines again. I don't care if AA is direct and there is a layover with another airline, I'll take the layover.

Leave on time. We waited on the plane for hour hours and it was hot and smelly

Two hours delay, probably one hour because they didn’t bring catering and they had to bring water in board. There a change of aircraft. But delays galore at CLT so it must be a CLT and/or AA operation issue. The 1 hr additional delays because nobody could bring 2 packs of water sooner is probably the best example of this airline operates

Flight was delayed 5 hours. Initial reason for delay was 'maintenance' - which makes sense. Then, the additional 2 hours continued to say it was maintenance - when I know EWR had a 2 hour delay. AA did not say that. Additionally, when boarding, there was only one agent at the counter for a long time - until another came to help. After boarding, we had to wait another 45 minutes due to 'no catering'. So while we waited for catering, AA continued to board additional passengers - which seemed odd - and raised questions about what really was going on. I sat in First Class. During the flight, the flight crew allowed a significant number of non-First Class passengers to use the front bathroom - which created a very crowded environment in First Class which was uncomfortable. This also delayed First Class passengers from using the bathroom. Overall, horrible experience.

The Charleston, WV airport was cute. Very good staff and small enough to feel comfortable. The plane had more leg room than bigger planes. Much more comfortable.

Another uncoordinated American experience. Always surprises me at DFW for them of all places. Have to take this flight as there are no other good time options. We knew from the start that something was wrong, but the pilot wouldn't tell us. I just watched my Kayak app grow the delay by 10 minutes as it went to 3.5 hours. They were uncoordinated with maintenance (as maintenance, when finally arriving, knew within 15 minutes the plane wasn't going. No 'sorry' or 'this is what is going on' comment. The pilot seemed unfazed / didn't care about the process we were going through.

The seats. The seat in front of me was awful and when the guy sat down, it flew back and hit my head when I was putting my backpack under the seat, It didn't make for a pleasant experience,

I’ve got 31F seat and window seat . My 2 co passengers was AA crew members and they were very rude attitude and when I was going to use bathroom their gestures was very different and awkward and the guy beside me completely occupied the hand rest and I was really uncomfortable

The gate experience at LAX was abysmal (same for the arrival experience two days prior). Despite the LAX -> SAT schedule of two flights daily, our departure gate was at a smaller hub that we had to be bussed to from Terminal 4. Fortunately, I arrived at LAX extra early and had time to spare, but if I had not known, I might have missed my flight. I looked at the LAX airport map in the AA app and there was no indication of the additional boarding process. Lastly the gate area we were bussed to was crowded with limited food and beverage options. On flight, the fight attendant was hospitable and attentive, the flight was smooth, and AA's free (and working) wifi for AA members were all on the positive side.

Everything you need to know for your flight from Seattle to New Hampshire

Information on your arrival and departure airports