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Ontario

$100+ Cheap flights from New Hampshire to Ontario (ONT)

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 6/30. Fares are subject to change and may not be available on all flights or dates of travel.
MHT — ONT
Jun 23 — Jun 301
Mon 6/23
Mon 6/30
1 adult, Economy
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Cheap flight deals from New Hampshire to Ontario

Keep the following information in mind while searching for New Hampshire to Ontario flight deals. Data was last updated June 18, 2025.

Round-trip from

$200
(Frontier)

One-way from

$100
(Frontier)

Popular in

December

Cheapest in

September

Average price

$437
From New Hampshire to Ontario
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One-way flight from New Hampshire to Ontario
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Highest demand for flights based on searches. 3% potential increase in price ($12 potential increase over avg. RT price).
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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 June 2025
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Find flight deals from New Hampshire to Ontario

Cheapest flights from New Hampshire to Ontario
Explore the most affordable flight options available from New Hampshire to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 18, 2025.

This Frontier deal was found by Cheapflights users on 6/16. 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.
Mon 6/3011:56 amBOS - ONT
1 stop10h 18mFrontier
Thu 7/108:09 pmONT - BOS
1 stop11h 48mFrontier
Deal found 6/16$200
This American Airlines deal was found by Cheapflights users on 6/18. 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 7/246:25 pmPWM - ONT
1 stop8h 29mAmerican Airlines
Tue 7/296:15 amONT - PWM
2 stops11h 15mAmerican Airlines
Deal found 6/18$279
This Southwest deal was found by Cheapflights users on 6/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/305:50 amBOS - ONT
1 stop14h 50mSouthwest
Mon 6/309:20 pmONT - BOS
1 stop9h 30mSouthwest
Deal found 6/16$282
This JetBlue deal was found by Cheapflights users on 6/17. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/161:59 pmBOS - ONT
1 stop11h 00mJetBlue
Sun 7/2011:59 pmONT - BOS
1 stop9h 16mJetBlue
Deal found 6/17$291
This JetBlue deal was found by Cheapflights users on 6/16. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/152:19 pmPWM - ONT
1 stop10h 40mJetBlue
Tue 7/2211:59 pmONT - PWM
1 stop10h 24mJetBlue
Deal found 6/16$291
This Delta deal was found by Cheapflights users on 6/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/26:00 amBOS - ONT
1 stop9h 17mDelta
Fri 7/47:05 amONT - BOS
1 stop7h 51mDelta
Deal found 6/17$297
This American Airlines deal was found by Cheapflights users on 6/18. 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 7/12:44 pmBOS - ONT
1 stop10h 27mAmerican Airlines
Mon 7/710:28 pmONT - BOS
1 stop9h 39mAmerican Airlines
Deal found 6/18$308
This Alaska Airlines deal was found by Cheapflights users on 6/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/257:20 amBOS - ONT
1 stop9h 49mAlaska Airlines
Mon 9/2911:39 amONT - BOS
1 stop9h 44mAlaska Airlines
Deal found 6/16$312
This United Airlines deal was found by Cheapflights users on 6/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/46:07 amBOS - ONT
2 stops9h 25mUnited Airlines
Fri 7/41:34 pmONT - BOS
1 stop7h 21mUnited Airlines
Deal found 6/17$316
This Southwest deal was found by Cheapflights users on 6/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1711:30 amMHT - ONT
1 stop9h 10mSouthwest
Tue 7/229:20 pmONT - MHT
1 stop9h 40mSouthwest
Deal found 6/16$417
This American Airlines deal was found by Cheapflights users on 6/17. 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 7/212:10 pmMHT - ONT
2 stops12h 28mAmerican Airlines
Sun 7/69:45 pmONT - MHT
2 stops10h 54mAmerican Airlines
Deal found 6/17$442
This United Airlines deal was found by Cheapflights users on 6/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/179:40 amMHT - ONT
2 stops15h 50mUnited Airlines
Sat 9/206:50 pmONT - MHT
2 stops12h 52mUnited Airlines
Deal found 6/15$452

Cheapflights Fare Finder

Customize your flight search to find flights from New Hampshire to Ontario 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 June 18, 2025.
Use the filters below to find and compare flights from New Hampshire to Ontario that are best for you.

Fly from

New Hampshire

Fly to

Ontario

Route

Depart

Return

Price

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Mon 6/30

11:56 am-7:14 pm

1 stop10h 18m

Ontario

Thu 7/10

8:09 pm-10:57 am

1 stop11h 48m

$200

PortlandOntario

PWM - ONT

PWMONT

Portland

Thu 7/24

6:25 pm-11:54 pm

1 stop8h 29m

Ontario

Tue 7/29

6:15 am-8:30 pm

2 stops11h 15m

$279

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Mon 6/30

5:50 am-5:40 pm

1 stop14h 50m

Ontario

Mon 6/30

9:20 pm-9:50 am

1 stop9h 30m

$282

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 7/16

1:59 pm-9:59 pm

1 stop11h 00m

Ontario

Sun 7/20

11:59 pm-12:15 pm

1 stop9h 16m

$291

PortlandOntario

PWM - ONT

PWMONT

Portland

Tue 7/15

2:19 pm-9:59 pm

1 stop10h 40m

Ontario

Tue 7/22

11:59 pm-1:23 pm

1 stop10h 24m

$291

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 7/2

6:00 am-12:17 pm

1 stop9h 17m

Ontario

Fri 7/4

1:15 pm-12:24 am

1 stop8h 09m

$297

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 7/1

2:44 pm-10:11 pm

1 stop10h 27m

Ontario

Mon 7/7

10:28 pm-11:07 am

1 stop9h 39m

$308

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 8/6

9:20 am-6:04 pm

1 stop11h 44m

Ontario

Mon 8/11

6:58 pm-8:00 am

1 stop10h 02m

$312

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 7/4

6:07 am-12:32 pm

2 stops9h 25m

Ontario

Fri 7/4

1:34 pm-11:55 pm

1 stop7h 21m

$316

ManchesterOntario

MHT - ONT

MHTONT

Manchester

Thu 7/17

11:30 am-5:40 pm

1 stop9h 10m

Ontario

Tue 7/22

9:20 pm-10:00 am

1 stop9h 40m

$417

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/16

Showing 1-10 of 33 results
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Best time to book a flight from New Hampshire to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from New Hampshire to Ontario (average of $246). Flying from New Hampshire to Ontario in March is currently the most expensive (average of $328). 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated June 18, 2025.
Read through reviews of airlines operating flights from New Hampshire to Ontario, such as Alaska Airlines, Southwest and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,280 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,964 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,507 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,810 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

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

    Most people fly into Ontario (ONT) if they book a flight to Ontario from New Hampshire. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

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

    The cheapest airlines for a one-way flight from New Hampshire to Ontario are Frontier ($100), American Airlines ($129), and Southwest ($134).

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

    Most travelers choose Boston Logan Intl - Ontario, Portland - Ontario or Manchester - Ontario when deciding on the best route from New Hampshire to Ontario.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from New Hampshire to Ontario (average of $246). Flying from New Hampshire to Ontario in March is currently the most expensive (average of $328). 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 New Hampshire to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from New Hampshire to Ontario

Discover the top 2 airlines that operate flights from New Hampshire to Ontario. 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 June 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$342Average$596FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$346Average$439FlexibilityNo cancel feeOn-time63%

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