$144 Find Cheap Flights from San Diego 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 San Diego to New Hampshire departing on 5/6. 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 San Diego 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 San Diego to New Hampshire, as well as popular online travel agencies
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Cheap Flights from San Diego to New Hampshire

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boston
Boston1 stop$229
Portland
Portland1 stop$357
Boston
Boston1 stop$229
Portland
Portland1 stop$357

Book Cheap San Diego 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 San Diego 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 San Diego to New Hampshire

Tue, May 5 - Tue, May 12
Southwest Logo
9:40 pm - 8:15 am
SAN
-
BOS
7h 35m
1 stop
Southwest Logo
11:40 am - 6:55 pm
BOS
-
SAN
10h 15m
1 stop
$229Southwest
Tue, Apr 28 - Wed, May 6
American Airlines Logo
9:45 pm - 10:01 am
SAN
-
BOS
9h 16m
1 stop
American Airlines Logo
12:57 pm - 6:46 pm
BOS
-
SAN
8h 49m
1 stop
$232American Airlines
Tue, May 5 - Tue, May 12
Southwest Logo
6:20 am - 5:15 pm
SAN
-
BOS
7h 55m
1 stop
Southwest Logo
2:25 pm - 9:20 pm
BOS
-
SAN
9h 55m
2 stops
$234Southwest
Wed, Apr 29 - Wed, May 6
American Airlines Logo
10:40 pm - 11:32 am
SAN
-
BOS
9h 52m
1 stop
American Airlines Logo
3:18 pm - 10:00 pm
BOS
-
SAN
9h 42m
1 stop
$249American Airlines
Wed, Jun 10 - Mon, Jun 15
JetBlue Logo
1:41 pm - 10:23 pm
SAN
-
BOS
5h 42mnonstop
JetBlue Logo
6:05 am - 9:10 am
BOS
-
SAN
6h 05mnonstop
$262JetBlue
Tue, Apr 28 - Tue, May 5
JetBlue Logo
8:35 pm - 5:04 am
SAN
-
BOS
5h 29mnonstop
JetBlue Logo
4:00 pm - 7:17 pm
BOS
-
SAN
6h 17mnonstop
$267JetBlue
Tue, Sep 8 - Sat, Sep 12
Breeze Airways Logo
12:54 pm - 4:16 pm
SAN
-
PWM
24h 22m
1 stop
Breeze Airways Logo
5:01 pm - 11:24 am
PWM
-
SAN
21h 23m
1 stop
$357Breeze Airways
Wed, May 27 - Tue, Jun 2
United Airlines Logo
10:40 pm - 2:02 pm
SAN
-
MHT
12h 22m
2 stops
United Airlines Logo
2:37 pm - 8:23 pm
MHT
-
SAN
8h 46m
1 stop
$364United Airlines
Tue, May 12 - Tue, May 26
United Airlines Logo
10:40 pm - 10:23 am
SAN
-
PWM
8h 43m
1 stop
United Airlines Logo
5:15 am - 10:49 am
PWM
-
SAN
8h 34m
1 stop
$367United Airlines
Sun, Aug 23 - Sun, Aug 30
Breeze Airways Logo
12:44 pm - 10:38 pm
SAN
-
PWM
30h 54m
1 stop
Breeze Airways Logo
8:22 pm - 12:20 pm
PWM
-
SAN
18h 58m
1 stop
$408Breeze Airways
Booking Insights

KAYAK's insights & trends for San Diego to New Hampshire flights

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

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

The average price for all round-trip flights from San Diego 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 at night, when round-trip flights cost $330 on average. Morning departures are around 30% 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 $451.

What is the cheapest month to fly from San Diego to New Hampshire?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Diego 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 San Diego to New Hampshire is January, when tickets cost $307 (return) on average. On the other hand, the most expensive months are December and April, when the average cost of round-trip tickets is $449 and $407 respectively.

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

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

For San Diego to New Hampshire, Wednesday is the cheapest day to fly on average and Sunday is the most expensive. Flying from New Hampshire back to San Diego, the best deals are generally found on Tuesday, with Sunday being the most expensive.

How far in advance should I book a flight from San Diego 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 San Diego 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 San Diego to New Hampshire, you should book around 4 weeks before departure, which saves you about 49% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$144
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly and prices are also 24% lower on average.
Flight from San Diego to Boston

FAQs - booking New Hampshire flights

  • How does KAYAK find such low prices on flights from San Diego 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 San Diego to New Hampshire.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from San Diego 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 San Diego 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 San Diego 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 San Diego 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 San Diego 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 San Diego to the following destinations at these prices or less: Boston $235 one-way - $297 round-trip

Reviews of the top airlines flying from San Diego to New Hampshire

 
See real verified KAYAK customer reviews for airlines flying from San Diego 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 San Diego 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.
8.0
SouthwestOverall score based on 4318 reviews
8.0Comfort
7.0Food
8.6Crew
8.1Boarding
7.5Entertainment
Airline reviews

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

8.0 ExcellentTobin, Mar 2026
SJC - BUR
Read more Southwest reviews

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

Flight boarded late after announcing on time boarding. Flight arrived only a little late despite late departure. Had trouble connecting to WiFi

The Southwest experience has definitely taken a dive from its early days. You can no longer deferentiate from other airlines. Air travel is too expensive. Southwest is no longer budget friendly. They have lost me as a loyal customer.

The charges were ridiculous for an hour flight and the turbulence was very scary.

The seats are now more narrow. I paid for front row the seats in the front are even more narrow than before.

The wifi on the plane is great. The only issue that I have is that I prefer an aisle seat and on my trips this week, I was either in the middle or window. If we can work to secure aisle seating, I will be thrilled. Nice trip.

Great flight but super high price. Glad it was a business trip and not personal

3 hour delay. Had to change plans and was still delayed.

The crew canceled the complementary snack and drink in anticipation of turbulence that never materialized. I was counting on the drink (water) to take the the doses of medication - prescribed for my heart condition - that were due during the flight. Since no snack or meal was served on this flight, I cannot rate the food quality. Otherwise, this flight was excellent.

Delay after delay with little communication then AA lost my luggage and at airport would not assist just said scan this QR code to track your luggage and submit a claim. However QR code provided did not work so have to go back to airport

Dloght delayed by 2.5 hrs . Common theme in my last four american floghts

They are rarely on time! Very hard to plan your travels when flights or connections keep getting delayed.

My seat was assigned last row behind restrooms No legroom’s I’m very Pettit Still was not comfortable Food choice was excellent

The chicken wrap was tiny ($13 for what looked like a 1/3 of a normal wrap?) and disgusting.

Mediocre would be best description. Food bland. Seat biz class uncomfortable to sleep. Crew never dimmed lights completely in an overnight flight to Europe. Would avoid AA if possible.

Small plane, poor meal choices for first class, bad terminal and boarding experience at LAX

Massimo, flight attendant was very authentic, attentive - wonderful. Food/wrap was just okay.

Experience was great. The best part is the free Wi-Fi connection which helps me to work on the flight

The flight was fine. It's the satellite terminal that supports American eagle flights is what sucks. There is only one food option and everything there is way overpriced. I mean I know it's airport pricing, but it's even crazier than that. I bought a sandwich in a plastic container for $18.

Everything you need to know for your flight from San Diego to New Hampshire

Information on your arrival and departure airports