HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
New Hampshire

$82+ 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 12/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MHT
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to New Hampshire with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 November 6, 2025.

This American Airlines deal was found by Cheapflights users on 11/6. 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 12/47:30 pmONT - BOS
1 stop6h 56mAmerican Airlines
Wed 12/106:10 amBOS - ONT
1 stop8h 50mAmerican Airlines
Deal found 11/6$258
This American Airlines deal was found by Cheapflights users on 11/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/510:47 amONT - BOS
1 stop9h 13mAmerican Airlines
Sat 1/176:00 amBOS - ONT
1 stop9h 03mAmerican Airlines
Deal found 11/5$296
This Delta deal was found by Cheapflights users on 11/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:05 amONT - BOS
1 stop8h 54mDelta
Sun 1/115:30 pmBOS - ONT
1 stop8h 08mDelta
Deal found 11/3$297
This American Airlines deal was found by Cheapflights users on 11/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/510:47 amONT - BOS
1 stop7h 46mAmerican Airlines
Sun 12/75:30 amBOS - ONT
1 stop9h 23mAmerican Airlines
Deal found 11/5$299
This Delta deal was found by Cheapflights users on 11/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/276:00 amONT - BOS
1 stop7h 10mDelta
Thu 12/1110:15 amBOS - ONT
1 stop8h 54mDelta
Deal found 11/5$302
This Alaska Airlines deal was found by Cheapflights users on 11/4. 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.
Fri 12/57:33 pmONT - BOS
1 stop8h 56mAlaska Airlines
Tue 12/99:00 amBOS - ONT
1 stop12h 33mAlaska Airlines
Deal found 11/4$306
This United Airlines deal was found by Cheapflights users on 11/4. 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.
Fri 12/51:34 pmONT - BOS
1 stop7h 00mUnited Airlines
Sun 12/76:00 amBOS - ONT
1 stop9h 18mUnited Airlines
Deal found 11/4$307
This American Airlines deal was found by Cheapflights users on 11/6. 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 12/1012:46 pmONT - BOS
1 stop7h 14mAmerican Airlines
Wed 12/176:10 amBOS - ONT
1 stop8h 50mAmerican Airlines
Deal found 11/6$318
This Delta deal was found by Cheapflights users on 11/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/106:40 amONT - PWM
2 stops14h 19mDelta
Mon 12/154:53 pmPWM - ONT
2 stops10h 05mDelta
Deal found 11/5$333
This American Airlines deal was found by Cheapflights users on 11/6. 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 11/207:30 pmONT - ORH
2 stops16h 21mAmerican Airlines
Mon 11/243:17 pmORH - ONT
2 stops21h 40mAmerican Airlines
Deal found 11/6$452
This United Airlines deal was found by Cheapflights users on 11/4. 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.
Wed 12/175:05 amONT - MHT
2 stops10h 44mUnited Airlines
Wed 12/242:23 pmMHT - ONT
2 stops11h 02mUnited Airlines
Deal found 11/4$479
This United Airlines deal was found by Cheapflights users on 11/4. 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 12/185:05 amONT - MHT
2 stops10h 46mUnited Airlines
Wed 12/242:23 pmMHT - ONT
2 stops11h 02mUnited Airlines
Deal found 11/4$489

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 November 6, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$258
(American Airlines)

One-way from

$82
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$372
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
High demand for flights, 4% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 6, 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

Thu 11/27

6:00 am-4:10 pm

1 stop7h 10m

Boston Logan Intl

Wed 12/10

1:40 pm-7:39 pm

1 stop8h 59m

$302

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 11/27

6:00 am-4:10 pm

1 stop7h 10m

Boston Logan Intl

Thu 12/4

6:46 pm-11:58 pm

1 stop8h 12m

$302

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 12/5

1:34 pm-11:34 pm

1 stop7h 00m

Boston Logan Intl

Sun 12/7

6:00 am-12:18 pm

1 stop9h 18m

$307

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 12/4

1:29 pm-11:41 pm

1 stop7h 12m

Boston Logan Intl

Mon 12/8

6:46 pm-11:58 pm

1 stop8h 12m

$307

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Wed 12/10

6:40 am-11:59 pm

2 stops14h 19m

Portland

Mon 12/15

4:53 pm-11:58 pm

2 stops10h 05m

$333

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 12/9

5:05 am-3:42 pm

1 stop7h 37m

Boston Logan Intl

Tue 12/16

6:00 am-12:17 pm

1 stop9h 17m

$377

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 12/3

6:00 am-5:43 pm

1 stop8h 43m

Boston Logan Intl

Sun 12/7

6:00 am-12:18 pm

1 stop9h 18m

$388

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Wed 4/1

6:02 am-9:27 pm

2 stops12h 25m

Portland

Sun 4/5

4:48 pm-10:26 pm

1 stop8h 38m

$388

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 12/5

10:30 am-10:15 pm

1 stop8h 45m

Boston Logan Intl

Thu 12/18

7:05 am-3:20 pm

2 stops11h 15m

$398

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 12/12

6:00 am-5:43 pm

1 stop8h 43m

Boston Logan Intl

Sun 12/14

6:00 am-12:18 pm

1 stop9h 18m

$407

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 60 results
1
2
3
...
6

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 March is currently the most expensive (average of $618). 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 November 6, 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
4,241 reviews

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

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
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

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?

    Delta, United Airlines, and Southwest can get you from Ontario to New Hampshire in just under 7h. Your travel time can differ by up to 6h 20m. 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 Alaska Airlines, which is currently one of the cheapest options available, starting at $148. Delta flights start at $164 while deals on American Airlines start at $181 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, 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 March is currently the most expensive (average of $618). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to New Hampshire

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
Los Angeles to Newark flights
San Francisco to John F Kennedy Intl flights
San Francisco to Los Angeles flights
Los Angeles to Seattle flights
Los Angeles to LaGuardia flights
Los Angeles to Dallas/Fort Worth flights
San Francisco to Las Vegas flights
San Francisco to Newark flights
Los Angeles to Honolulu flights
Ontario to San Francisco flights
Los Angeles to San Francisco flights
San Francisco to Seattle flights
Santa Ana to San Francisco flights
San Francisco to Dallas/Fort Worth flights
San Francisco to Santa Ana flights
San Francisco to Honolulu flights
San Francisco to Ontario flights
Los Angeles to Orlando flights
San Francisco to LaGuardia flights
Ontario to Seattle flights
Los Angeles to Miami flights
Los Angeles to Las Vegas flights
Los Angeles to San Jose flights
Los Angeles to Fort Lauderdale flights
San Jose to Las Vegas flights
San Francisco to O'Hare Intl flights
San Diego to John F Kennedy Intl flights
Los Angeles to Boston flights
Burbank to Las Vegas flights
Los Angeles to O'Hare Intl flights
Ontario to John F Kennedy Intl flights
Los Angeles to Dulles Intl flights
Los Angeles to Sky Harbor Intl flights
Los Angeles to Denver flights
Los Angeles to Hobby flights
Los Angeles to Reagan-National flights
Los Angeles to Kahului flights
Ontario to Newark flights
Los Angeles to Portland flights
Burbank to LaGuardia flights
San Francisco to San Diego flights
San Diego to Newark flights
Santa Ana to Seattle flights
San Francisco to Kahului flights
Los Angeles to Austin flights
Los Angeles to Baltimore flights
San Francisco to Miami flights
Santa Ana to LaGuardia flights
Los Angeles to Salt Lake City flights

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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$446Average$537FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.