$114 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 8/5. 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

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$266
Portland
Portland1 stop$291
Boston
Boston1 stop$266
Portland
Portland1 stop$291

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

Sat, Sep 6 - Tue, Sep 16
JetBlue Logo
10:56 pm - 9:34 amONT-BOS
7h 38m1 stop
JetBlue Logo
2:45 pm - 9:29 pmBOS-ONT
9h 44m1 stop
$266JetBlue
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Sun, Aug 31 - Thu, Sep 4
American Airlines Logo
7:32 pm - 6:13 amONT-BOS
7h 41m1 stop
American Airlines Logo
2:38 pm - 10:33 pmBOS-ONT
10h 55m1 stop
$273American Airlines
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Tue, Sep 9 - Tue, Sep 16
Alaska Airlines Logo
11:39 am - 12:27 amONT-BOS
9h 48m1 stop
Alaska Airlines Logo
7:20 am - 2:12 pmBOS-ONT
9h 52m1 stop
$277Alaska Airlines
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Fri, Sep 5 - Wed, Sep 10
Hawaiian Airlines Logo
5:49 pm - 6:00 amONT-BOS
9h 11m1 stop
Hawaiian Airlines Logo
7:20 am - 2:12 pmBOS-ONT
9h 52m1 stop
$284Hawaiian Airlines
Find Deal
Tue, Sep 9 - Fri, Sep 12
Alaska Airlines Logo
11:39 am - 12:27 amONT-BOS
9h 48m1 stop
Alaska Airlines Logo
7:20 am - 2:12 pmBOS-ONT
9h 52m1 stop
$294Alaska Airlines
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Thu, Sep 4 - Wed, Sep 10
Delta Logo
11:45 am - 1:24 amONT-BOS
10h 39m1 stop
Delta Logo
1:35 pm - 7:11 pmBOS-ONT
8h 36m1 stop
$295Delta
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Thu, Sep 4 - Wed, Sep 10
Delta Logo
11:45 am - 1:24 amONT-BOS
10h 39m1 stop
Delta Logo
5:35 am - 10:35 amBOS-ONT
8h 00m1 stop
$296Delta
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Fri, Aug 15 - Sat, Aug 23
Southwest Logo
10:35 am - 10:35 pmONT-BOS
9h 00m1 stop
Southwest Logo
8:00 am - 3:45 pmBOS-ONT
10h 45m1 stop
$318Southwest
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Fri, Sep 5 - Wed, Sep 10
Southwest Logo
10:35 am - 10:35 pmONT-BOS
9h 00m1 stop
Southwest Logo
9:25 am - 6:25 pmBOS-ONT
12h 00m2 stops
$321Southwest
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Mon, Oct 27 - Sun, Nov 2
Hawaiian Airlines Logo
6:11 pm - 7:40 amONT-BOS
10h 29m1 stop
Hawaiian Airlines Logo
4:46 pm - 11:56 pmBOS-ONT
10h 10m1 stop
$340Hawaiian Airlines
Find Deal
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.

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

To calculate monthly average prices, KAYAK takes all prices for each month 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 median of all values for each month.

The cheapest month for flights from Ontario to New Hampshire is August, when tickets cost $363 (return) on average. On the other hand, the most expensive months are November and July, when the average cost of round-trip tickets is $456 and $433 respectively.

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

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

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

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 3 weeks before departure, which saves you about 37% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.


Good to know

Low seasonJanuary
Cheapest flight$114
Best time to beat the crowds with an average 28% drop in price.
Most popular time to fly with an average 17% increase in price.
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.

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

    The cheapest time of day to fly to New Hampshire is generally in the evening, when round-trip flights cost $405 on average. Morning departures are around 14% 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 $463.

Reviews of the top airlines 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.
8.0
SouthwestOverall score based on 4241 reviews
8.0Comfort
8.6Crew
7.0Food
8.1Boarding
7.5Entertainment
Airline reviews

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

4.0 OkayTraci, Jun 2025OAK - SEA
Read more Southwest reviews

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

No trays in our seats, we sat in first row, purchased a business class fare. Had to hold our drinks and snack in our hands. No plugs for our cell phones. Had to pay for it a drink cocktail each. Seats so uncomfortable.

Flight wasn’t even full, but too many carry-ons caused us to run out of bin space. New bag fee has folks who would usually check their bags carrying on. Watching Southwest morph into Spirit/Frontier is so sad to watch

Southwest is Southwest. No frills. If you're luck enough to get a happy crew (we did), then it makes for a nicer flight.

It was a perfect flight in all aspects! Both legs!

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

I liked the crew member who gave flight instructions on "in case of a problem:. The seats are so small that only a young teenager could sit in middle seat.

Great flight staff. Ease of boarding. Overall, very uneventful and easy trip.

Employees were kind and funny, as always! Flight was late but no announcements were made for people with tight connections to help them transition quickly. No service due to turbulence.

I recently flew Southwest from San Jose to Honolulu. I was very impressed with the flight crew, especially the flight attendant in charge of the front of the plane. She came through the aisle at least five times for drinks and water, and two times for snacks. I have not seen such service since I flew first class. Also, for the first time, they gave us the correct baggage claim number, and the luggage came out quickly. I can't wait for Southwest to have assigned seating! I absolutely hate the Cattle Call boarding procedure and the mad dash to get seats and overhead bins. However, the boarding was efficient.

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

Delayed flight, so I switched fights to SFO to Phoenix , Phoenix to DSM. Excellent service through American Airlines

AA re-routed flight from HNL to LAX due to delay. My group of 3 with reserved seats in row 9 was broken up, with one assigned to a middle seat, another in the last row of the plane. Not happy. No explanation to the delay. No apologies. No compensation. Would have been nice to be offered an Admiral Club admission or a voucher for the extra 3 hours of layover in LAX. Could not hear the boarding gate announcements in LAX. Adjacent gate was boarding at the same time. Loud speakers were competing against each other. Barely made my boarding group.

Almost a 6 hour flight and the only food option is a cheese plate… and chips. Also how is it there are no options for texting on American. I’ll be going back to delta and united.

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

Cramped seats. FAA should make airlines have more legroom, for even short people complain

Eventless. It was a good flight and good crew. Can’t complaint.

Very helpful ground crew after an earlier flight delay and being rebooked on a different flight.

The plane was late and then sat on the runway for almost 45 minutes before taking off.

We kept being told that the flight was full and that all overhead compartments were full and therefore had to check in our hand luggage. We were some of the last people to board and noticed that there was still sufficient space in the overhead compartments. We were obliged to check in hand luggage when there was space and so had to wait at luggage retrieval which took a while to then noticed damage to our luggage - not a great experience!

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

Information on your arrival and departure airports

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