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New Hampshire

$153+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MHT
Aug 24 — Aug 311
Mon 8/24
Mon 8/31
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 July 25, 2026.

This United Airlines deal was found by Cheapflights users on 7/21. 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 8/177:13 pm
ONT
-
BOS
1 stop10h 01m
United Airlines
Thu 8/202:00 pm
BOS
-
ONT
1 stop9h 01m
United Airlines
Deal found 7/21$332
This American Airlines deal was found by Cheapflights users on 7/20. 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 8/1812:59 pm
ONT
-
BOS
1 stop7h 25m
American Airlines
Wed 8/266:30 am
BOS
-
ONT
1 stop8h 33m
American Airlines
Deal found 7/20$337
This Alaska Airlines deal was found by Cheapflights users on 7/23. 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 11/34:09 pm
ONT
-
BOS
1 stop10h 32m
Alaska Airlines
Wed 11/49:00 am
BOS
-
ONT
1 stop10h 58m
Alaska Airlines
Deal found 7/23$341
This Delta deal was found by Cheapflights users on 7/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1412:00 pm
ONT
-
BOS
1 stop10h 25m
Delta
Tue 8/187:45 am
BOS
-
ONT
1 stop12h 36m
Delta
Deal found 7/22$342
This Delta deal was found by Cheapflights users on 7/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1412:00 pm
ONT
-
BOS
1 stop10h 25m
Delta
Thu 8/205:30 am
BOS
-
ONT
1 stop8h 12m
Delta
Deal found 7/22$343
This Southwest deal was found by Cheapflights users on 7/22. 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.
Tue 11/310:50 am
ONT
-
MHT
1 stop7h 30m
Southwest
Thu 11/57:35 am
MHT
-
ONT
1 stop8h 30m
Southwest
Deal found 7/22$345
This Delta deal was found by Cheapflights users on 7/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2310:00 pm
ONT
-
BOS
1 stop8h 39m
Delta
Tue 9/15:30 am
BOS
-
ONT
1 stop8h 12m
Delta
Deal found 7/22$347
This Southwest deal was found by Cheapflights users on 7/22. 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 10/1411:55 pm
ONT
-
BOS
1 stop11h 30m
Southwest
Wed 10/211:05 pm
BOS
-
ONT
2 stops10h 40m
Southwest
Deal found 7/22$348
This Priceline deal was found by Cheapflights users on 7/24. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2411:59 pm
ONT
-
PWM
1 stop9h 31m
JetBlue
Mon 8/312:40 pm
PWM
-
ONT
1 stop10h 58m
JetBlue
Deal found 7/24$349
This American Airlines deal was found by Cheapflights users on 7/23. 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.
Wed 10/77:34 pm
ONT
-
BOS
1 stop7h 24m
American Airlines
Wed 10/146:10 am
BOS
-
ONT
1 stop10h 20m
American Airlines
Deal found 7/23$350
This United Airlines deal was found by Cheapflights users on 7/20. 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 8/105:45 am
ONT
-
BOS
1 stop8h 49m
United Airlines
Mon 8/176:00 am
BOS
-
ONT
1 stop9h 12m
United Airlines
Deal found 7/20$351
This Southwest deal was found by Cheapflights users on 7/23. 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.
Mon 8/318:40 pm
ONT
-
BOS
2 stops10h 15m
Southwest
Sun 9/66:40 am
BOS
-
ONT
2 stops10h 10m
Southwest
Deal found 7/23$352

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 July 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$332
(United Airlines)

One-way from

$153
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$478
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. 13% potential increase in price ($62 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 25, 2026.
Use the filters below to find and compare flights from Ontario to New Hampshire that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 8/12

7:05 am-6:10 pm

1 stop8h 05m

Boston Logan Intl

Thu 8/20

5:30 am-10:42 am

1 stop8h 12m

$337

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 9/4

11:56 am-12:17 am

1 stop9h 21m

Boston Logan Intl

Wed 9/9

6:05 am-12:14 pm

1 stop9h 09m

$347

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 10/14

11:55 pm-2:25 pm

1 stop11h 30m

Boston Logan Intl

Wed 10/21

1:05 pm-8:45 pm

2 stops10h 40m

$348

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 9/15

6:08 am-7:24 pm

2 stops10h 16m

Portland

Tue 9/22

4:57 pm-10:59 pm

1 stop9h 02m

$356

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 9/15

8:35 am-10:05 pm

2 stops10h 30m

Portland

Tue 9/22

5:45 am-1:10 pm

2 stops10h 25m

$361

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Wed 9/2

10:29 am-11:47 pm

2 stops10h 18m

Portland

Sat 9/5

6:00 am-1:53 pm

2 stops10h 53m

$372

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 8/29

9:25 am-9:40 pm

2 stops9h 15m

Boston Logan Intl

Sun 9/6

6:40 am-1:50 pm

2 stops10h 10m

$398

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sat 8/15

11:13 pm-12:21 pm

1 stop10h 08m

Portland

Sat 8/22

2:40 pm-9:59 pm

1 stop10h 19m

$410

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 8/21

8:30 am-9:50 pm

2 stops10h 20m

Boston Logan Intl

Fri 8/28

12:40 pm-8:40 pm

2 stops11h 00m

$423

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 8/18

11:59 pm-1:45 pm

1 stop10h 46m

Portland

Mon 8/24

2:40 pm-10:38 pm

1 stop10h 58m

$426

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/20

Showing 1-10 of 56 resultsSorted by cheapest first
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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

No data available for this route at this time. Please check back soon.

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 July 25, 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
4,233 reviews

Crew

8.6

Entertainment

7.5

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
Southwest
8.0
Very good
4,233 reviews
Southwest
8.0
Very good
4,233 reviews

Crew

8.6

Entertainment

7.5

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

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?

    Delta, Southwest, and United Airlines can get you from Ontario to New Hampshire in just under 8h 05m. Your travel time can differ by up to 3h 53m. 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.

See more FAQs

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Alternative routes for Ontario to New Hampshire

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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 July 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$436Average$522FlexibilityNo cancel feeOn-time63%

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