$149 Find Cheap Flights from Ontario 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 Ontario to New Hampshire departing on 7/7. 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 Ontario 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 Ontario to New Hampshire, as well as popular online travel agencies
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Cheap Flights from Ontario to New Hampshire

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boston
Boston1 stop$292
Portland
Portland1 stop$329
Boston
Boston1 stop$292
Portland
Portland1 stop$329

Book Cheap Ontario 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 Ontario 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 Ontario to New Hampshire

Tue, Sep 8 - Tue, Sep 22
United Airlines Logo
7:13 pm - 8:01 am
ONT
-
BOS
9h 48m
1 stop
United Airlines Logo
2:03 pm - 8:04 pm
BOS
-
ONT
9h 01m
1 stop
$292United Airlines
Thu, May 28 - Mon, Jun 1
Delta Logo
1:29 pm - 11:58 pm
ONT
-
BOS
7h 29m
1 stop
Delta Logo
6:10 am - 12:19 pm
BOS
-
ONT
9h 09m
1 stop
$297Delta
Sat, May 23 - Fri, May 29
Delta Logo
5:45 pm - 7:35 am
ONT
-
BOS
10h 50m
1 stop
Delta Logo
5:35 am - 10:57 am
BOS
-
ONT
8h 22m
1 stop
$298Delta
Thu, May 28 - Tue, Jun 2
American Airlines Logo
7:12 pm - 8:41 am
ONT
-
BOS
10h 29m
2 stops
American Airlines Logo
4:06 pm - 11:59 pm
BOS
-
ONT
10h 53m
1 stop
$302American Airlines
Tue, Jul 14 - Tue, Jul 21
Southwest Logo
2:50 pm - 12:45 am
ONT
-
BOS
6h 55m
1 stop
Southwest Logo
5:25 am - 12:05 pm
BOS
-
ONT
9h 40m
1 stop
$303Southwest
Thu, May 28 - Tue, Jun 2
American Airlines Logo
7:12 pm - 8:41 am
ONT
-
BOS
10h 29m
2 stops
American Airlines Logo
11:20 am - 6:22 pm
BOS
-
ONT
10h 02m
2 stops
$307American Airlines
Mon, Jun 8 - Fri, Jun 12
Southwest Logo
9:40 pm - 10:55 am
ONT
-
BOS
10h 15m
2 stops
Southwest Logo
5:25 am - 1:50 pm
BOS
-
ONT
11h 25m
1 stop
$308Southwest
Tue, Jun 2 - Fri, Jun 5
Alaska Airlines Logo
7:00 am - 6:24 am
ONT
-
BOS
20h 24m
1 stop
Alaska Airlines Logo
7:11 pm - 11:10 am
BOS
-
ONT
18h 59m
1 stop
$309Alaska Airlines
Tue, Aug 11 - Wed, Aug 19
JetBlue Logo
11:50 pm - 1:45 pm
ONT
-
PWM
10h 55m
1 stop
JetBlue Logo
2:40 pm - 10:35 pm
PWM
-
ONT
10h 55m
1 stop
$329JetBlue
Tue, Aug 11 - Tue, Aug 18
JetBlue Logo
11:50 pm - 1:45 pm
ONT
-
PWM
10h 55m
1 stop
JetBlue Logo
1:17 pm - 10:35 pm
PWM
-
ONT
12h 18m
1 stop
$366JetBlue
Booking Insights

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

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

How far in advance should I book a flight from Ontario 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 Ontario 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 Ontario to New Hampshire, you should book around 2 weeks before departure, which saves you about 14% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

Find deals

Good to know

Low seasonJanuary
Cheapest flight$149
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly and prices are also 17% lower on average.
Flight from Ontario to Boston

FAQs - booking New Hampshire flights

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ontario 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 Ontario 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 Ontario 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 Ontario 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 Ontario to New Hampshire up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Ontario to New Hampshire

 
See real verified KAYAK customer reviews for airlines flying from Ontario 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 Ontario 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 4296 reviews
8.6Crew
7.5Entertainment
8.1Boarding
7.0Food
8.0Comfort
Airline reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

10.0 Excellentlarry, Apr 2026
LGB - PHX
Read more Southwest reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

Delayed flight, lack of information, boarding process is a mess as is the carryon luggage causing issues when leaving the plane….just a poor experience.

Comfortable. Easy. No problems. Just wish they had gf options for snacks.

The crew was very kind and made going to Hawaii relaxing and fun to look forward to! Thank you Southwest for a pleasant flight!

Terrible. Even though there’s assigned seating now, they are still the slowest boarding airline of anyone.

It was good from LAX to Phoenix, But the connection in Phoenix to Tulsa was not that great. The staff on both flights were great. The choice of free entertainment was ok nothing to brag about. The 45 min delay because of some electrical issue wasn't great from Phoenix to Tulsa. We sat there with hardly any air, The seat I had was between windows so the side of the plane pushed in on you. My being a bigger man it then made the seating area uncomfortable. The seats on the plane had no power to connect to recharge your phone or anything. I would recommend that they should look into a slot or clamp to hold your phone to enjoy while watching the entertainment choices hands-free. Also make it possible to raise the inner seat by the window be able to raise the arm rest up to make more room for larger people to set more comfortably. I would also say other then that stop price gouging the airfare or nickel and diming everything. Not fair for people having to fly for emergencies and be paying for higher prices due to the season or holidays. Your making your money either way and the cost of flying is still going to be the same regardless if there's 100 people or 200 people.

Southwest was greaat! The most expensive but the least upsetting for those we were flying to see.

Boarding was easy. The seats are small and fairly uncomfortable

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

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

Information on your arrival and departure airports

Ontario (ONT)