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$28+ Cheap flights from Ontario (ONT) to North America

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 1/13. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
1 adult, Economy
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Find flight deals from Ontario to North America

Cheapest flights from Ontario to North America
Explore the most affordable flight options available from Ontario to North America. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 23, 2025.

This CheapOair deal was found by Cheapflights users on 10/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:15 amONT - LAS
Nonstop1h 07mFrontier
Fri 12/512:02 pmLAS - ONT
Nonstop1h 08mFrontier
Deal found 10/21$57
This CheapOair deal was found by Cheapflights users on 10/23. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/128:00 amONT - LAS
Nonstop1h 12mFrontier
Fri 11/1411:41 amLAS - ONT
Nonstop1h 10mFrontier
Deal found 10/23$58
This Frontier deal was found by Cheapflights users on 10/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:00 amONT - LAS
Nonstop1h 11mFrontier
Mon 11/1711:41 amLAS - ONT
Nonstop1h 10mFrontier
Deal found 10/23$59
This Priceline deal was found by Cheapflights users on 10/20. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/166:15 amONT - LAS
Nonstop1h 07mFrontier
Tue 12/234:13 pmLAS - ONT
Nonstop1h 09mFrontier
Deal found 10/20$64
This Priceline deal was found by Cheapflights users on 10/22. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/75:18 pmONT - LAS
Nonstop1h 09mFrontier
Thu 12/118:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 10/22$65
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/96:15 amONT - LAS
Nonstop1h 07mFrontier
Fri 12/128:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 10/22$66
This Frontier deal was found by Cheapflights users on 10/22. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/136:15 amONT - LAS
Nonstop1h 07mFrontier
Mon 12/158:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 10/22$67
This CheapOair deal was found by Cheapflights users on 10/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/16:30 amONT - LAS
Nonstop1h 10mFrontier
Fri 12/512:02 pmLAS - ONT
Nonstop1h 08mFrontier
Deal found 10/21$69
This Kiwi.com deal was found by Cheapflights users on 10/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:15 amONT - LAS
Nonstop1h 07mFrontier
Wed 12/318:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 10/21$73
This Frontier deal was found by Cheapflights users on 10/22. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/226:00 pmONT - LAS
Nonstop1h 11mFrontier
Wed 12/248:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 10/22$74
This Priceline deal was found by Cheapflights users on 10/21. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3010:40 pmONT - SFO
Nonstop1h 29mFrontier
Fri 10/3110:21 pmSFO - ONT
Nonstop1h 29mFrontier
Deal found 10/21$74
This CheapOair deal was found by Cheapflights users on 10/22. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/75:18 pmONT - LAS
Nonstop1h 09mFrontier
Wed 12/108:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 10/22$75

Cheap flight deals from Ontario to North America

Keep the following information in mind while searching for Ontario to North America flight deals. Data was last updated October 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$53
(Frontier)

One-way from

$28
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$358

Good round-trip deal

$114 or less

Good one-way deal

$46 or less
Provider with most accurate pricing for Los Angeles-New York (NYC) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-New York (NYC) flights.
Search Deals
From Ontario to North America
Search Deals
One-way flight from Ontario to North America
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($19 potential increase over avg. RT price).
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 October 2025
Search Deals
Price to beat on a round-trip flight from Ontario to North America.
Search Deals
Price to beat on a one-way flight from Ontario to North America.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to North America 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 October 23, 2025.
Use the filters below to find and compare flights from Ontario to North America that are best for you.

Fly from

Ontario

Fly to

North America

Route

Depart

Return

Price

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Fri 2/20

5:00 am-8:16 am

Nonstop2h 16m

Denver Intl

Wed 2/25

11:15 am-12:43 pm

Nonstop2h 28m

$117

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Thu 12/4

5:25 pm-9:50 pm

1 stop4h 25m

Seattle/Tacoma Intl

Mon 12/8

6:15 am-10:35 am

1 stop4h 20m

$126

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Sat 11/15

6:38 pm-8:02 pm

Nonstop1h 24m

San Francisco

Mon 11/17

11:15 am-12:37 pm

Nonstop1h 22m

$137

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Thu 11/13

1:40 pm-3:04 pm

Nonstop1h 24m

San Francisco

Tue 11/18

11:15 am-12:37 pm

Nonstop1h 22m

$137

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Thu 12/4

3:10 pm-10:55 pm

1 stop5h 45m

Houston Hobby

Mon 12/8

5:45 pm-7:15 pm

Nonstop3h 30m

$138

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Thu 12/4

6:00 am-8:57 am

Nonstop2h 57m

Seattle/Tacoma Intl

Mon 12/8

8:55 pm-11:29 pm

Nonstop2h 34m

$139

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 12/6

6:00 am-8:57 am

Nonstop2h 57m

Seattle/Tacoma Intl

Sun 12/7

8:43 am-11:19 am

Nonstop2h 36m

$139

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Sat 1/10

8:30 am-4:00 pm

2 stops7h 30m

Las Vegas Harry Reid Intl

Mon 1/12

7:45 pm-8:45 pm

Nonstop1h 00m

$145

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Sat 12/13

5:05 am-8:20 am

Nonstop2h 15m

Denver Intl

Tue 12/16

11:15 am-12:32 pm

Nonstop2h 17m

$145

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Fri 2/6

8:50 pm-9:55 pm

Nonstop1h 05m

Las Vegas Harry Reid Intl

Mon 2/9

6:00 am-10:05 am

1 stop4h 05m

$150

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/23

Showing 1-10 of 60 results
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Best time to book a flight from Ontario to North America

Have a flexible travel schedule? Discover the best time to fly to North America 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 North America

What is the cheapest month to book a flight from Ontario to North America?

Currently, December is the cheapest month in which you can book a flight from Ontario to North America (average of $17). Flying from Ontario to North America in July is currently the most expensive (average of $49). 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.

What is the cheapest time of day to fly from ONT to NA?

Find hourly flight availability from Ontario to North America. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 23, 2025.

It’s typically best to fly out from Ontario to North America in the afternoon. Doing so could potentially save you 32% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Ontario to North America?

Use this chart to determine the cheapest time to fly round-trip from Ontario to North America. Price data was last updated on October 19, 2025.

Travelers seeking maximum savings on their Ontario to North America flight should consider departing on Sunday at noon when fares are most often at their lowest. Wednesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing North America

Get insights into the airlines that provide service to North America. 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 North America. Reviews last updated October 23, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Ontario to North America. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,236 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Food

7.0

Overall

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
4,236 reviews
Southwest
8.0
Very good
4,236 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Food

7.0

Overall

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.
Delta
7.9
Good
7,982 reviews
Southwest
8.0
Very good
4,236 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Food

7.0

Overall

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.
United Airlines
7.4
Good
8,995 reviews
Southwest
8.0
Very good
4,236 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Food

7.0

Overall

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.
American Airlines
7.2
Good
11,033 reviews
Southwest
8.0
Very good
4,236 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Food

7.0

Overall

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.
Frontier
5.8
Fair
3,128 reviews
Southwest
8.0
Very good
4,236 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Food

7.0

Overall

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 North America. 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 North America?

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

  • How long is the flight from Ontario to North America?

    A quick flight from Ontario to North America can take about 2h 16m. United Airlines provides one of the quickest options available for as low as $117. The distance from Ontario to North America is about 817 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Ontario to North America one-way?

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $39. However, be on the lookout for offers from Southwest and American Airlines, as they are both options that can get you from Ontario to North America for a low price.

  • What are the most popular routes from Ontario to North America?

    The most popular flight routes from Ontario to North America are Ontario - Seattle/Tacoma Intl, Ontario - San Francisco and Ontario - Las Vegas Harry Reid Intl.

  • Can I find deals for flights from Ontario to North America that include hotel bookings?

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

  • How can I find direct flights from Ontario to North America?

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

  • Can I find deals for business class flights from Ontario to North America?

    Yes. Cheapflights offers flight deals from Ontario to North America 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 North America?

    Currently, December is the cheapest month in which you can book a flight from Ontario to North America (average of $17). Flying from Ontario to North America in July is currently the most expensive (average of $49). 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.

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Alternative routes for Ontario to North America

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Ontario to North America

Discover the top 8 airlines that operate flights from Ontario to North America. 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 October 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$24Average$148FlexibilityNo cancel feeOn-time65%
FrontierCheapest$36Average$178FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$58Average$385FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$67Average$371FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$97Average$380FlexibilityNo cancel feeOn-time63%
DeltaCheapest$147Average$366FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$237Average$331FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$247Average$430FlexibilityNo cancel feeOn-time71%

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