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New Hampshire

$90+ 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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MHT
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$220
(Southwest)

One-way from

$90
(Southwest)

Popular in

December

Cheapest in

January

Average price

$326
From Ontario to New Hampshire
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One-way flight from Ontario to New Hampshire
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High demand for flights, 1% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This Southwest deal was found by Cheapflights users on 9/9. 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.
Thu 11/132:15 pmONT - BOS
1 stop6h 50mSouthwest
Sat 11/155:20 amBOS - ONT
1 stop8h 25mSouthwest
Deal found 9/9$224
This Southwest deal was found by Cheapflights users on 9/9. 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 10/2112:00 pmONT - BOS
1 stop7h 40mSouthwest
Thu 10/233:50 pmBOS - ONT
1 stop10h 00mSouthwest
Deal found 9/9$225
This Southwest deal was found by Cheapflights users on 9/11. 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.
Sat 10/187:45 amONT - BOS
1 stop10h 05mSouthwest
Sat 10/255:20 amBOS - ONT
1 stop8h 20mSouthwest
Deal found 9/11$234
This Southwest deal was found by Cheapflights users on 9/8. 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.
Fri 10/2412:50 pmONT - BOS
1 stop8h 05mSouthwest
Tue 10/285:15 amBOS - ONT
1 stop11h 15mSouthwest
Deal found 9/8$239
This Alaska Airlines deal was found by Cheapflights users on 9/10. 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.
Sat 11/1511:59 amONT - BOS
1 stop9h 21mAlaska Airlines
Tue 12/99:00 amBOS - ONT
1 stop12h 32mAlaska Airlines
Deal found 9/10$242
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Sat 10/41:15 pmONT - BOS
1 stop7h 29mUnited Airlines
Wed 10/84:25 pmBOS - ONT
1 stop9h 05mUnited Airlines
Deal found 9/10$243
This Southwest deal was found by Cheapflights users on 9/9. 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.
Fri 11/72:15 pmONT - BOS
1 stop6h 50mSouthwest
Mon 11/106:20 pmBOS - ONT
1 stop8h 45mSouthwest
Deal found 9/9$250
This Southwest deal was found by Cheapflights users on 9/9. 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 11/106:50 amONT - BOS
1 stop12h 40mSouthwest
Thu 11/136:20 pmBOS - ONT
1 stop8h 45mSouthwest
Deal found 9/9$253
This Alaska Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 11/1411:59 amONT - BOS
1 stop9h 21mAlaska Airlines
Tue 12/99:00 amBOS - ONT
1 stop12h 32mAlaska Airlines
Deal found 9/10$254
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Mon 11/310:34 pmONT - BOS
1 stop8h 55mAmerican Airlines
Wed 11/57:30 amBOS - ONT
1 stop9h 32mAmerican Airlines
Deal found 9/10$255
This Southwest deal was found by Cheapflights users on 9/11. 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.
Fri 11/1412:35 pmONT - PWM
2 stops8h 45mSouthwest
Tue 11/185:30 amPWM - ONT
2 stops12h 10mSouthwest
Deal found 9/11$267
This Southwest deal was found by Cheapflights users on 9/9. 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.
Sun 10/126:20 amONT - MHT
1 stop7h 20mSouthwest
Tue 10/215:00 amMHT - ONT
1 stop11h 30mSouthwest
Deal found 9/9$328

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 September 11, 2025.
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 10/15

6:27 pm-6:00 am

1 stop8h 33m

Boston Logan Intl

Wed 11/5

4:10 pm-10:31 pm

1 stop9h 21m

$261

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Fri 11/14

12:35 pm-12:20 am

2 stops8h 45m

Portland

Tue 11/18

5:30 am-2:40 pm

2 stops12h 10m

$267

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 11/4

11:59 am-12:20 am

1 stop9h 21m

Boston Logan Intl

Wed 11/12

7:00 am-3:17 pm

1 stop11h 17m

$274

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 11/19

11:15 am-10:45 pm

1 stop8h 30m

Boston Logan Intl

Sun 11/23

5:15 am-12:25 pm

2 stops10h 10m

$284

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 10/5

10:56 pm-11:45 am

1 stop9h 49m

Boston Logan Intl

Fri 10/10

2:45 pm-9:29 pm

1 stop9h 44m

$295

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 10/11

7:02 am-5:51 pm

1 stop7h 49m

Boston Logan Intl

Wed 10/22

12:10 pm-8:24 pm

2 stops11h 14m

$296

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 12/2

1:20 pm-11:40 pm

1 stop7h 20m

Boston Logan Intl

Fri 12/5

6:47 pm-11:59 pm

1 stop8h 12m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 11/5

11:59 am-12:20 am

1 stop9h 21m

Boston Logan Intl

Thu 11/13

7:00 am-3:17 pm

1 stop11h 17m

$311

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 9/27

1:15 pm-11:59 pm

1 stop7h 44m

Boston Logan Intl

Wed 10/1

6:10 am-12:17 pm

1 stop9h 07m

$312

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 10/23

5:45 pm-6:00 am

1 stop9h 15m

Boston Logan Intl

Sat 11/1

7:00 am-3:17 pm

1 stop11h 17m

$316

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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, January is the cheapest month in which you can book a flight from Ontario to New Hampshire (average of $334). Flying from Ontario to New Hampshire in April is currently the most expensive (average of $397). 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 September 11, 2025.
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
4,248 reviews

Food

7.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Food

7.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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?

    United Airlines, Southwest, and Alaska Airlines can get you from Ontario to New Hampshire in just under 8h 33m. Your travel time can differ by up to 48m. Airlines will cover a distance of 2559 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Ontario to New Hampshire one-way?

    To fly one-way, consider booking your trip with Southwest, which is currently one of the cheapest options available, starting at $90. American Airlines flights start at $164 while deals on Delta start at $164 one-way.

  • 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, January is the cheapest month in which you can book a flight from Ontario to New Hampshire (average of $334). Flying from Ontario to New Hampshire in April is currently the most expensive (average of $397). 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$374Average$496FlexibilityNo cancel feeOn-time63%

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