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New Hampshire

$119+ 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 10/30. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MHT
Aug 22 — Aug 291
Fri 8/22
Fri 8/29
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 August 17, 2025.

Round-trip from

$227
(Frontier)

One-way from

$119
(Frontier)

Popular in

December

Cheapest in

January

Average price

$389
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 ($10 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 17, 2025.

This Frontier deal was found by Cheapflights users on 8/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/74:05 pmONT - BOS
2 stops15h 43mFrontier
Mon 11/1012:20 pmBOS - ONT
2 stops14h 30mFrontier
Deal found 8/16$227
This Frontier deal was found by Cheapflights users on 8/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/144:05 pmONT - BOS
2 stops15h 43mFrontier
Sun 11/168:40 amBOS - ONT
2 stops18h 10mFrontier
Deal found 8/16$232
This Frontier deal was found by Cheapflights users on 8/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3012:05 pmONT - BOS
2 stops16h 47mFrontier
Sun 11/210:04 amBOS - ONT
2 stops16h 36mFrontier
Deal found 8/17$235
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/113:43 pmONT - BOS
2 stops15h 15mFrontier
Thu 9/1810:13 amBOS - ONT
2 stops11h 22mFrontier
Deal found 8/14$236
This Frontier deal was found by Cheapflights users on 8/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/258:34 amONT - BOS
2 stops20h 59mFrontier
Sat 11/1511:43 amBOS - ONT
2 stops15h 07mFrontier
Deal found 8/17$238
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1212:28 pmONT - BOS
2 stops16h 43mFrontier
Mon 9/1512:59 pmBOS - ONT
2 stops10h 57mFrontier
Deal found 8/14$243
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2312:32 pmONT - BOS
2 stops17h 01mFrontier
Mon 10/279:50 amBOS - ONT
2 stops17h 17mFrontier
Deal found 8/14$244
This American Airlines deal was found by Cheapflights users on 8/14. 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.
Thu 10/2311:59 pmONT - PWM
2 stops11h 39mAmerican Airlines
Tue 10/283:38 pmPWM - ONT
1 stop8h 58mAmerican Airlines
Deal found 8/14$248
This Frontier deal was found by Cheapflights users on 8/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1312:05 pmONT - BOS
2 stops16h 47mFrontier
Sun 11/1610:04 amBOS - ONT
2 stops16h 46mFrontier
Deal found 8/17$253
This American Airlines deal was found by Cheapflights users on 8/17. 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 9/248:15 amONT - BOS
1 stop10h 39mAmerican Airlines
Wed 10/87:05 amBOS - ONT
1 stop9h 38mAmerican Airlines
Deal found 8/17$257
This lastminute.com deal was found by Cheapflights users on 8/15. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/510:56 pmONT - BOS
1 stop7h 38mJetBlue
Sat 9/132:45 pmBOS - ONT
1 stop9h 44mJetBlue
Deal found 8/15$261
This Frontier deal was found by Cheapflights users on 8/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/27:44 pmONT - BOS
2 stops10h 16mFrontier
Fri 11/712:20 pmBOS - ONT
2 stops14h 30mFrontier
Deal found 8/16$262

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 August 17, 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

Fri 11/7

4:05 pm-10:48 am

2 stops15h 43m

Boston Logan Intl

Mon 11/10

12:20 pm-11:50 pm

2 stops14h 30m

$227

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 10/30

12:05 pm-7:52 am

2 stops16h 47m

Boston Logan Intl

Sun 11/2

10:04 am-11:50 pm

2 stops16h 46m

$227

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 11/6

12:05 pm-7:52 am

2 stops16h 47m

Boston Logan Intl

Mon 11/10

9:55 am-11:50 pm

2 stops16h 55m

$227

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 10/30

12:05 pm-7:52 am

2 stops16h 47m

Boston Logan Intl

Mon 11/3

9:55 am-11:50 pm

2 stops16h 55m

$227

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 11/14

4:05 pm-10:48 am

2 stops15h 43m

Boston Logan Intl

Sun 11/16

8:40 am-11:50 pm

2 stops18h 10m

$232

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 10/26

12:49 pm-8:33 am

2 stops16h 44m

Boston Logan Intl

Thu 10/30

12:20 pm-11:50 pm

2 stops14h 30m

$235

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 9/11

3:43 pm-9:58 am

2 stops15h 15m

Boston Logan Intl

Sun 9/14

10:13 am-6:35 pm

2 stops11h 22m

$236

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 9/11

3:43 pm-9:58 am

2 stops15h 15m

Boston Logan Intl

Thu 9/18

10:13 am-6:35 pm

2 stops11h 22m

$236

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 10/26

12:49 pm-8:33 am

2 stops16h 44m

Boston Logan Intl

Sat 11/1

11:43 am-11:50 pm

2 stops15h 07m

$236

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Thu 10/23

11:59 pm-2:38 pm

2 stops11h 39m

Portland

Tue 10/28

3:38 pm-9:36 pm

1 stop8h 58m

$248

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

Showing 1-10 of 58 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 $395). 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 August 17, 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
4,246 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

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
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

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.

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

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $119. Delta flights start at $149 while deals on JetBlue start at $161 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 $395). 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 August 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$374Average$516FlexibilityNo cancel feeOn-time63%

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