North America

$34+ 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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
Dec 26 — Jan 21
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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 November 26, 2025.

This FlightHub deal was found by Cheapflights users on 11/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/166:15 amONT - LAS
Nonstop1h 07mFrontier
Wed 12/178:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 11/25$56
This Kiwi.com deal was found by Cheapflights users on 11/26. 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 12/166:15 amONT - LAS
Nonstop1h 07mFrontier
Tue 12/168:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 11/26$57
This CheapOair deal was found by Cheapflights users on 11/25. 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 12/176:15 amONT - LAS
Nonstop1h 07mFrontier
Wed 12/178:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 11/25$58
This CheapOair deal was found by Cheapflights users on 11/24. 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 12/156:15 amONT - LAS
Nonstop1h 07mFrontier
Wed 12/178:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 11/24$60
This CheapOair deal was found by Cheapflights users on 11/25. 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.
Tue 12/306:00 amONT - LAS
Nonstop1h 07mFrontier
Wed 1/78:45 amLAS - ONT
Nonstop1h 05mFrontier
Deal found 11/25$68
This Super.com deal was found by Cheapflights users on 11/26. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/166:15 amONT - LAS
Nonstop1h 07mFrontier
Thu 12/184:13 pmLAS - ONT
Nonstop1h 09mFrontier
Deal found 11/26$69
This Kiwi.com deal was found by Cheapflights users on 11/26. 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.
Sun 12/146:15 amONT - LAS
Nonstop1h 07mFrontier
Wed 12/178:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 11/26$70
This Super.com deal was found by Cheapflights users on 11/24. 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 Super.com 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 11/24$72
This CheapOair deal was found by Cheapflights users on 11/25. 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 12/116:15 amONT - LAS
Nonstop1h 07mFrontier
Mon 12/158:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 11/25$73
This Gotogate deal was found by Cheapflights users on 11/25. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/166:15 amONT - LAS
Nonstop1h 07mFrontier
Fri 12/194:01 pmLAS - ONT
Nonstop1h 08mFrontier
Deal found 11/25$74
This Super.com deal was found by Cheapflights users on 11/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/126:15 amONT - LAS
Nonstop1h 07mFrontier
Mon 12/158:13 pmLAS - ONT
Nonstop1h 04mFrontier
Deal found 11/24$75
This Kiwi.com deal was found by Cheapflights users on 11/25. 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.
Thu 12/1110:12 pmONT - SFO
Nonstop1h 40mFrontier
Mon 1/510:44 pmSFO - ONT
Nonstop1h 28mFrontier
Deal found 11/25$88

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 November 26, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$53
(Frontier)

One-way from

$34
(CheapOair)

Popular in

December

Cheapest in

January

Average price

$383

Good round-trip deal

$135 or less

Good one-way deal

$43 or less
Provider with most accurate pricing for Los Angeles-New York (NYC) flight deals.
Provider most trusted by Cheapflights users for Los Angeles-New York (NYC) flights.
From Ontario to North America
One-way flight from Ontario to North America
Highest demand for flights based on searches. 6% potential increase in price ($22 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Average for round-trip flights in November 2025
Price to beat on a round-trip flight from Ontario to North America.
Price to beat on a one-way flight from Ontario to North America.

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 November 26, 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

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Fri 3/6

5:00 pm-12:09 am

1 stop7h 09m

Seattle/Tacoma Intl

Mon 3/9

2:30 pm-5:12 pm

Nonstop2h 42m

$129

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Mon 12/22

5:10 pm-12:20 am

1 stop7h 10m

Seattle/Tacoma Intl

Sat 1/3

8:15 am-11:02 am

Nonstop2h 47m

$129

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 1/24

3:30 pm-6:35 pm

Nonstop3h 05m

Seattle/Tacoma Intl

Mon 1/26

7:00 pm-11:58 pm

1 stop4h 58m

$129

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Thu 1/22

3:30 pm-6:35 pm

Nonstop3h 05m

Seattle/Tacoma Intl

Thu 1/29

7:00 pm-11:58 pm

1 stop4h 58m

$129

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Tue 12/16

6:00 am-7:24 am

Nonstop1h 24m

San Francisco

Tue 12/16

10:55 am-12:17 pm

Nonstop1h 22m

$132

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Thu 1/8

1:10 pm-6:29 pm

1 stop5h 19m

Seattle/Tacoma Intl

Mon 1/12

6:05 pm-10:38 pm

1 stop4h 33m

$139

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 1/10

6:00 am-12:33 pm

1 stop6h 33m

Seattle/Tacoma Intl

Sun 1/11

6:05 pm-10:38 pm

1 stop4h 33m

$139

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Wed 1/21

1:10 pm-6:29 pm

1 stop5h 19m

Seattle/Tacoma Intl

Thu 1/29

7:00 pm-11:58 pm

1 stop4h 58m

$139

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Wed 12/10

1:50 pm-3:14 pm

Nonstop1h 24m

San Francisco

Thu 12/11

9:28 pm-10:49 pm

Nonstop1h 21m

$149

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 1/10

1:40 pm-8:20 pm

1 stop6h 40m

Seattle/Tacoma Intl

Mon 1/12

11:20 am-4:25 pm

1 stop5h 05m

$151

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/24

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 November 26, 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 November 25, 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 November 26, 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.

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

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.

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

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.

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

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.

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

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.

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

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.

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

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 1h 05m. Delta provides one of the quickest options available for as low as $154. The distance from Ontario to North America is about 197 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 Frontier, with whom users have recently found tickets for as low as $61. However, be on the lookout for offers from Southwest and United 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?

  • 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.

Top 10 airlines flying from Ontario to North America

Discover the top 10 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 November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$24Average$161FlexibilityNo cancel feeOn-time65%
FrontierCheapest$36Average$201FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$58Average$402FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$67Average$319FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$97Average$393FlexibilityNo cancel feeOn-time63%
DeltaCheapest$178Average$407FlexibilityNo cancel feeOn-timeN/A
VivaCheapest$228Average$248FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$237Average$330FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$242Average$464FlexibilityNo cancel feeOn-time71%
VolarisCheapest$273Average$384FlexibilityNo cancel feeOn-time79%

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