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$39+ 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 7/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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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 July 3, 2025.

Round-trip from

$57
(United Airlines)

One-way from

$39
(Frontier)

Popular in

December

Cheapest in

January

Average price

$384

Good round-trip deal

$109 or less

Good one-way deal

$69 or less
From Ontario to North America
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One-way flight from Ontario to North America
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Highest demand for flights based on searches. 4% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Ontario to North America.
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Price to beat on a one-way flight from Ontario to North America.
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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 July 3, 2025.

This United Airlines deal was found by Cheapflights users on 6/30. 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.
Tue 7/291:19 pmONT - SFO
Nonstop1h 27mUnited Airlines
Tue 8/54:16 pmSFO - ONT
Nonstop1h 27mUnited Airlines
Deal found 6/30$57
This Frontier deal was found by Cheapflights users on 7/1. 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.
Fri 8/89:41 pmONT - SFO
Nonstop1h 33mFrontier
Mon 8/1110:11 pmSFO - ONT
Nonstop1h 29mFrontier
Deal found 7/1$58
This Frontier deal was found by Cheapflights users on 7/2. 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.
Tue 7/157:00 amONT - LAS
Nonstop1h 11mFrontier
Wed 7/165:18 pmLAS - ONT
Nonstop1h 09mFrontier
Deal found 7/2$77
This Frontier deal was found by Cheapflights users on 7/2. 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 8/42:31 pmONT - PDX
Nonstop2h 18mFrontier
Fri 8/811:13 amPDX - ONT
Nonstop2h 23mFrontier
Deal found 7/2$99
This Southwest deal was found by Cheapflights users on 7/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/262:10 pmONT - LAS
Nonstop1h 10mSouthwest
Wed 8/272:55 pmLAS - ONT
1 stop5h 20mSouthwest
Deal found 7/3$107
This Booking.com deal was found by Cheapflights users on 7/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1012:59 amONT - DEN
Nonstop2h 20mFrontier
Mon 7/1410:29 pmDEN - ONT
Nonstop2h 21mFrontier
Deal found 7/2$108
This Frontier deal was found by Cheapflights users on 7/1. 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.
Tue 7/2910:03 amONT - SEA
Nonstop2h 50mFrontier
Thu 7/311:42 pmSEA - ONT
Nonstop2h 54mFrontier
Deal found 7/1$129
This Frontier deal was found by Cheapflights users on 7/1. 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 8/48:09 pmONT - DFW
Nonstop3h 15mFrontier
Fri 9/1210:15 amDFW - ONT
Nonstop3h 18mFrontier
Deal found 7/1$130
This Delta deal was found by Cheapflights users on 7/2. 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 7/236:25 amONT - SEA
Nonstop2h 48mDelta
Tue 7/297:30 amSEA - ONT
Nonstop2h 55mDelta
Deal found 7/2$157
This Alaska Airlines deal was found by Cheapflights users on 7/2. 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.
Wed 8/1310:03 amONT - SEA
1 stop4h 22mAlaska Airlines
Tue 8/195:25 amSEA - ONT
1 stop3h 58mAlaska Airlines
Deal found 7/2$176
This Hawaiian Airlines deal was found by Cheapflights users on 7/3. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/133:06 pmONT - SEA
Nonstop2h 40mHawaiian Airlines
Sat 9/207:55 amSEA - ONT
Nonstop2h 49mHawaiian Airlines
Deal found 7/3$177
This American Airlines deal was found by Cheapflights users on 7/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2711:59 pmONT - DFW
Nonstop3h 01mAmerican Airlines
Sat 8/309:48 pmDFW - ONT
Nonstop3h 00mAmerican Airlines
Deal found 7/3$179

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 July 3, 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

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Tue 7/29

1:19 pm-2:46 pm

Nonstop1h 27m

San Francisco

Tue 8/5

4:16 pm-5:43 pm

Nonstop1h 27m

$57

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Fri 8/8

9:41 pm-11:14 pm

Nonstop1h 33m

San Francisco

Mon 8/11

10:11 pm-11:40 pm

Nonstop1h 29m

$58

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 7/15

7:00 am-8:11 am

Nonstop1h 11m

Las Vegas Harry Reid Intl

Wed 7/16

5:18 pm-6:27 pm

Nonstop1h 09m

$77

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Mon 8/4

2:31 pm-4:49 pm

Nonstop2h 18m

Portland

Fri 8/8

11:13 am-1:36 pm

Nonstop2h 23m

$99

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 8/26

5:45 am-6:50 am

Nonstop1h 05m

Las Vegas Harry Reid Intl

Thu 8/28

11:30 am-4:30 pm

1 stop5h 00m

$107

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Thu 7/17

12:59 am-4:19 am

Nonstop2h 20m

Denver Intl

Sun 7/20

7:49 am-9:09 am

Nonstop2h 20m

$108

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Tue 7/29

10:03 am-12:53 pm

Nonstop2h 50m

Seattle/Tacoma Intl

Thu 7/31

1:42 pm-4:36 pm

Nonstop2h 54m

$129

OntarioDallas

ONT - DFW

ONTDFW

Ontario

Mon 8/4

8:09 pm-1:24 am

Nonstop3h 15m

Dallas/Fort Worth

Fri 9/12

10:15 am-11:33 am

Nonstop3h 18m

$130

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Wed 7/23

6:25 am-9:13 am

Nonstop2h 48m

Seattle/Tacoma Intl

Tue 7/29

7:30 am-10:25 am

Nonstop2h 55m

$157

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Wed 8/13

10:03 am-2:25 pm

1 stop4h 22m

Seattle/Tacoma Intl

Tue 8/19

5:25 am-9:23 am

1 stop3h 58m

$176

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 59 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, January is the cheapest month in which you can book a flight from Ontario to North America (average of $246). Flying from Ontario to North America in March is currently the most expensive (average of $326). 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 July 3, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to North America as you normally would.

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 July 3, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

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

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

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
4,266 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

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
7,982 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

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
2,545 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

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
8,861 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

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 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.

  • 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 $39. 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?

    The most popular flight routes from Ontario to North America are Ontario - Seattle/Tacoma Intl, Ontario - New York John F Kennedy 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, January is the cheapest month in which you can book a flight from Ontario to North America (average of $246). Flying from Ontario to North America in March is currently the most expensive (average of $326). 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 9 airlines flying from Ontario to North America

Discover the top 9 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$20Average$140FlexibilityNo cancel feeOn-time65%
FrontierCheapest$35Average$176FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$58Average$383FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$67Average$314FlexibilityNo cancel feeOn-time75%
DeltaCheapest$85Average$348FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$98Average$257FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$102Average$363FlexibilityNo cancel feeOn-time63%
JetBlueCheapest$207Average$343FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$244Average$411FlexibilityNo cancel feeOn-time71%

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