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$29+ 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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
nov. 29 — déc. 61
sam. 11/29
sam. 12/6
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 octobre 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
mar. 12/166:15 amONT - LAS
Nonstop1h 07mFrontier
mer. 12/178:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 10/29$57
This CheapOair deal was found by Cheapflights users on 10/30. 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.
dim. 12/145:18 pmONT - LAS
Nonstop1h 09mFrontier
jeu. 12/184:13 pmLAS - ONT
Nonstop1h 09mFrontier
Deal found 10/30$58
This Mytrip deal was found by Cheapflights users on 10/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 12/42:59 pmONT - LAS
Nonstop1h 09mFrontier
sam. 12/138:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 10/30$60
This Priceline deal was found by Cheapflights users on 10/30. 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.
sam. 12/66:15 amONT - LAS
Nonstop1h 07mFrontier
sam. 12/138:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 10/30$62
This Flightnetwork deal was found by Cheapflights users on 10/29. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 12/66:15 amONT - LAS
Nonstop1h 07mFrontier
sam. 12/68:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 10/29$63
This CheapOair deal was found by Cheapflights users on 10/30. 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.
dim. 12/76:15 amONT - LAS
Nonstop1h 07mFrontier
mer. 12/108:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 10/30$71
This Frontier deal was found by Cheapflights users on 10/30. 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.
ven. 12/126:15 amONT - LAS
Nonstop1h 07mFrontier
sam. 12/138:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 10/30$73
This Mytrip deal was found by Cheapflights users on 10/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 12/56:15 amONT - LAS
Nonstop1h 07mFrontier
sam. 12/68:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 10/29$74
This Frontier deal was found by Cheapflights users on 10/30. 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.
mar. 12/306:00 amONT - LAS
Nonstop1h 07mFrontier
jeu. 1/88:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 10/30$75
This United Airlines deal was found by Cheapflights users on 10/30. 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.
mer. 12/31:50 pmONT - SFO
Nonstop1h 24mUnited Airlines
sam. 12/64:16 pmSFO - ONT
Nonstop1h 21mUnited Airlines
Deal found 10/30$77
This Frontier deal was found by Cheapflights users on 10/30. 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.
dim. 12/216:37 pmONT - LAS
Nonstop1h 11mFrontier
mer. 12/248:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 10/30$78
This Priceline deal was found by Cheapflights users on 10/29. 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.
ven. 12/510:12 pmONT - SFO
Nonstop1h 40mFrontier
jeu. 12/119:03 pmSFO - ONT
Nonstop1h 26mFrontier
Deal found 10/29$78

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 octobre 30, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$57
(Kiwi.com)

One-way from

$29
(Frontier)

Popular in

December

Cheapest in

January

Average price

$365

Good round-trip deal

$114 or less

Good one-way deal

$43 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. 4% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 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 octobre 30, 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

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

sam. 11/15

8:00 am-9:12 am

Nonstop1h 12m

Las Vegas Harry Reid Intl

lun. 11/17

6:10 am-7:17 am

Nonstop1h 07m

$84

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

mer. 11/19

8:45 am-3:24 pm

1 stop6h 39m

Las Vegas Harry Reid Intl

mer. 11/19

7:33 pm-8:42 pm

Nonstop1h 09m

$97

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

dim. 12/21

6:37 pm-7:48 pm

Nonstop1h 11m

Las Vegas Harry Reid Intl

lun. 12/22

4:06 pm-5:15 pm

Nonstop1h 09m

$98

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

jeu. 12/4

6:15 am-7:22 am

Nonstop1h 07m

Las Vegas Harry Reid Intl

dim. 12/7

8:13 pm-9:17 pm

Nonstop1h 04m

$100

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

ven. 12/5

6:00 am-7:24 am

Nonstop1h 24m

San Francisco

sam. 12/6

9:28 pm-10:49 pm

Nonstop1h 21m

$104

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

mer. 12/17

12:35 pm-5:05 pm

1 stop4h 30m

Las Vegas Harry Reid Intl

mer. 12/17

7:45 pm-8:45 pm

Nonstop1h 00m

$107

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

mer. 12/24

6:00 am-7:07 am

Nonstop1h 07m

Las Vegas Harry Reid Intl

sam. 12/27

10:18 pm-11:21 pm

Nonstop1h 03m

$109

OntarioDenver

ONT - DEN

ONTDEN

Ontario

sam. 11/15

1:37 pm-8:05 pm

1 stop5h 28m

Denver Intl

lun. 11/17

7:00 am-12:51 pm

1 stop6h 51m

$110

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

lun. 12/22

6:00 am-7:07 am

Nonstop1h 07m

Las Vegas Harry Reid Intl

sam. 12/27

10:18 pm-11:21 pm

Nonstop1h 03m

$111

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

sam. 12/6

6:41 pm-8:05 pm

Nonstop1h 24m

San Francisco

jeu. 12/11

10:55 am-12:18 pm

Nonstop1h 23m

$127

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

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 octobre 30, 2025.

It’s typically best to fly out from Ontario to North America in the afternoon. Doing so could potentially save you 31% 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 26, 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 octobre 30, 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
4,243 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

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
4,243 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

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.
Delta
7.9
Good
7,998 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

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.
United Airlines
7.4
Good
8,998 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

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.
American Airlines
7.2
Good
11,035 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

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.
Frontier
5.8
Fair
3,122 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

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 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 1h 12m. Frontier provides one of the quickest options available for as low as $84. The distance from Ontario to North America is about 197 mi. Most flights are nonstop.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $29. However, be on the lookout for offers from United Airlines and Southwest, 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 - Dallas/Fort Worth, Ontario - Seattle/Tacoma Intl and Ontario - San Francisco.

  • 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.

See more FAQs

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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 octobre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$24Average$168FlexibilityNo cancel feeOn-time65%
FrontierCheapest$36Average$178FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$58Average$386FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$67Average$371FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$97Average$378FlexibilityNo cancel feeOn-time63%
DeltaCheapest$147Average$364FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$237Average$330FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$242Average$431FlexibilityNo cancel feeOn-time71%

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