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New Hampshire

$106+ Cheap flights from Ontario (ONT) 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MHT
Mar 7 — Mar 141
Sat 3/7
Sat 3/14
1 adult, Economy
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Cheap flight deals from Ontario to New Hampshire

Cheapest flights from Ontario to New Hampshire
Explore the most affordable flight options available from Ontario to New Hampshire. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 5, 2026.

This United Airlines deal was found by Cheapflights users on 2/3. 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.
Tue 3/106:37 pm
ONT
-
BOS
1 stop10h 36m
United Airlines
Tue 3/174:30 pm
BOS
-
ONT
1 stop8h 48m
United Airlines
Deal found 2/3$254
This Alaska Airlines deal was found by Cheapflights users on 2/5. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/104:02 pm
ONT
-
BOS
1 stop11h 52m
Alaska Airlines
Wed 3/114:36 pm
BOS
-
ONT
1 stop10h 16m
Alaska Airlines
Deal found 2/5$257
This United Airlines deal was found by Cheapflights users on 2/4. 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.
Thu 2/261:40 pm
ONT
-
BOS
1 stop8h 09m
United Airlines
Tue 3/36:00 am
BOS
-
ONT
1 stop9h 38m
United Airlines
Deal found 2/4$258
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Wed 9/166:30 pm
ONT
-
BOS
1 stop8h 28m
United Airlines
Wed 9/303:13 pm
BOS
-
ONT
1 stop10h 13m
United Airlines
Deal found 2/2$259
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Tue 4/215:10 am
ONT
-
BOS
2 stops10h 56m
United Airlines
Sat 4/257:09 am
BOS
-
ONT
1 stop8h 29m
United Airlines
Deal found 2/3$262
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Tue 3/36:10 am
ONT
-
BOS
2 stops11h 01m
United Airlines
Mon 3/94:30 pm
BOS
-
ONT
1 stop8h 48m
United Airlines
Deal found 2/3$263
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Mon 3/911:59 pm
ONT
-
BOS
2 stops9h 57m
United Airlines
Mon 3/164:30 pm
BOS
-
ONT
1 stop8h 48m
United Airlines
Deal found 2/3$264
This American Airlines deal was found by Cheapflights users on 2/3. 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.
Tue 3/1011:58 pm
ONT
-
BOS
2 stops9h 18m
American Airlines
Tue 3/172:40 pm
BOS
-
ONT
2 stops10h 27m
American Airlines
Deal found 2/3$269
This Alaska Airlines deal was found by Cheapflights users on 2/5. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/104:02 pm
ONT
-
BOS
1 stop11h 52m
Alaska Airlines
Thu 3/124:36 pm
BOS
-
ONT
1 stop10h 16m
Alaska Airlines
Deal found 2/5$275
This Alaska Airlines deal was found by Cheapflights users on 2/4. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/114:02 pm
ONT
-
BOS
1 stop11h 52m
Alaska Airlines
Tue 3/177:00 am
BOS
-
ONT
1 stop11h 08m
Alaska Airlines
Deal found 2/4$277
This Alaska Airlines deal was found by Cheapflights users on 2/1. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2512:02 pm
ONT
-
BOS
1 stop8h 57m
Alaska Airlines
Fri 2/274:36 pm
BOS
-
ONT
1 stop10h 16m
Alaska Airlines
Deal found 2/1$278
This Southwest deal was found by Cheapflights users on 2/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/255:45 pm
ONT
-
BOS
2 stops11h 35m
Southwest
Mon 3/25:20 am
BOS
-
ONT
1 stop8h 20m
Southwest
Deal found 2/2$281

Find flight deals from Ontario to New Hampshire

Keep the following information in mind while searching for Ontario to New Hampshire flight deals. Data was last updated February 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$254
(United Airlines)

One-way from

$106
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$344
Provider with most accurate pricing for Los Angeles-Boston Logan Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Boston Logan Intl flights.
Search Deals
From Ontario to New Hampshire
Search Deals
One-way flight from Ontario to New Hampshire
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario 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 February 5, 2026.
Use the filters below to find and compare flights from Ontario to New Hampshire that are best for you.

Fly from

Ontario

Fly to

New Hampshire

Route

Depart

Return

Price

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 3/4

4:02 pm-6:54 am

1 stop11h 52m

Boston Logan Intl

Tue 3/10

7:00 am-3:08 pm

1 stop11h 08m

$275

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 3/11

12:02 pm-11:59 pm

1 stop8h 57m

Boston Logan Intl

Tue 3/17

7:00 am-3:08 pm

1 stop11h 08m

$278

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 4/21

12:49 pm-1:15 am

1 stop9h 26m

Boston Logan Intl

Sat 4/25

3:00 pm-9:00 pm

1 stop9h 00m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 2/19

5:00 am-3:35 pm

1 stop7h 35m

Boston Logan Intl

Mon 2/23

3:14 pm-10:00 pm

1 stop9h 46m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 2/17

10:20 pm-10:02 am

1 stop8h 42m

Boston Logan Intl

Mon 2/23

6:37 pm-11:49 pm

1 stop8h 12m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 3/2

10:20 pm-10:02 am

1 stop8h 42m

Boston Logan Intl

Tue 3/10

5:35 am-11:47 am

1 stop9h 12m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 3/12

5:09 pm-6:10 am

1 stop10h 01m

Boston Logan Intl

Wed 3/18

7:10 am-5:13 pm

1 stop13h 03m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 3/4

1:15 pm-1:09 am

1 stop8h 54m

Boston Logan Intl

Mon 3/9

2:00 pm-9:00 pm

1 stop10h 00m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 3/9

5:53 pm-6:49 am

1 stop9h 56m

Boston Logan Intl

Thu 3/12

7:10 am-5:12 pm

1 stop13h 02m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 5/4

5:05 pm-6:00 am

1 stop9h 55m

Boston Logan Intl

Sun 5/10

6:10 am-12:19 pm

1 stop9h 09m

$297

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/4

Showing 1-10 of 60 results
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Best time to book a flight from Ontario to New Hampshire

Have a flexible travel schedule? Discover the best time to fly to New Hampshire from Ontario 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 Ontario to New Hampshire

What is the cheapest month to book a flight from Ontario to New Hampshire?

Currently, October is the cheapest month in which you can book a flight from Ontario to New Hampshire (average of $198). Flying from Ontario to New Hampshire in December is currently the most expensive (average of $563). 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.

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 February 5, 2026.
Read reviews from past customers who have flown Southwest from Ontario 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
4,275 reviews

Crew

8.6

Comfort

8.0

Food

7.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,275 reviews
Southwest
8.0
Very good
4,275 reviews

Crew

8.6

Comfort

8.0

Food

7.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Related info for your journey

Find useful and relevant information for your journey from Ontario 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 Ontario to New Hampshire?

    For a flight from Ontario to New Hampshire, you will be flying from Ontario. Ontario (ONT) is just 3.1 mi from the center of the city.

  • How long is the flight from Ontario to New Hampshire?

    Alaska Airlines, Delta, and American Airlines can get you from Ontario to New Hampshire in just under 9h 26m. Your travel time can differ by up to 13h 29m. Airlines will cover a distance of 2559 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Ontario to New Hampshire?

    The most popular route from Ontario to New Hampshire is Ontario - Boston Logan Intl. You may also consider Ontario - Portland or Ontario - Manchester.

  • Can I find deals for flights from Ontario to New Hampshire that include hotel bookings?

    Yes. In addition to deals on Ontario to New Hampshire flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to New Hampshire?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to New Hampshire.

  • Can I find deals for business class flights from Ontario to New Hampshire?

    Yes. Cheapflights offers flight deals from Ontario 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 Ontario to New Hampshire?

    Currently, October is the cheapest month in which you can book a flight from Ontario to New Hampshire (average of $198). Flying from Ontario to New Hampshire in December is currently the most expensive (average of $563). 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 Ontario to New Hampshire

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Ontario to New Hampshire

Discover the top airline that operate flights from Ontario 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 February 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$416Average$537FlexibilityNo cancel feeOn-time63%

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