HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
North America

$30+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
ago. 3 — ago. 101
dom. 8/3
dom. 8/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to North America with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 julio 29, 2025.

Round-trip from

$63
(Frontier)

One-way from

$30
(CheapOair)

Popular in

December

Cheapest in

January

Average price

$358

Good round-trip deal

$88 or less

Good one-way deal

$72 or less
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 ($21 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 July 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

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 julio 29, 2025.

This Mytrip deal was found by Cheapflights users on 7/29. 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.
dom. 8/35:14 pmONT - LAS
Nonstop1h 14mFrontier
lun. 8/47:45 pmLAS - ONT
Nonstop1h 07mFrontier
Deal found 7/29$63
This Cheapflightsfares deal was found by Cheapflights users on 7/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/159:41 pmONT - SFO
Nonstop1h 33mFrontier
dom. 8/1710:11 pmSFO - ONT
Nonstop1h 29mFrontier
Deal found 7/27$74
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/196:00 amONT - SFO
Nonstop1h 19mUnited Airlines
mar. 8/194:17 pmSFO - ONT
Nonstop1h 20mUnited Airlines
Deal found 7/29$97
This Southwest deal was found by Cheapflights users on 7/28. 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.
mié. 8/2710:20 amONT - LAS
Nonstop1h 05mSouthwest
mié. 9/38:30 amLAS - ONT
1 stop4h 40mSouthwest
Deal found 7/28$107
This Cheapflightsfares deal was found by Cheapflights users on 7/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/258:25 amONT - PDX
Nonstop2h 24mFrontier
vie. 8/297:04 pmPDX - ONT
Nonstop2h 23mFrontier
Deal found 7/29$110
This Cheapflightsfares deal was found by Cheapflights users on 7/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/1110:03 amONT - SEA
Nonstop2h 50mFrontier
jue. 8/141:42 pmSEA - ONT
Nonstop2h 54mFrontier
Deal found 7/28$144
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/1111:15 amONT - PDX
Nonstop2h 19mAlaska Airlines
mié. 10/159:30 pmPDX - ONT
Nonstop2h 21mAlaska Airlines
Deal found 7/29$157
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/41:10 pmONT - PDX
1 stop6h 13mAmerican Airlines
sáb. 10/185:05 amPDX - ONT
1 stop6h 56mAmerican Airlines
Deal found 7/29$159
This Hawaiian Airlines deal was found by Cheapflights users on 7/29. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/236:00 amONT - SEA
Nonstop2h 45mHawaiian Airlines
mar. 8/265:20 amSEA - ONT
1 stop4h 06mHawaiian Airlines
Deal found 7/29$167
This Delta deal was found by Cheapflights users on 7/28. 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.
sáb. 9/611:40 amONT - SEA
Nonstop2h 45mDelta
sáb. 9/138:15 amSEA - ONT
Nonstop2h 54mDelta
Deal found 7/28$177
This Southwest deal was found by Cheapflights users on 7/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/266:20 amONT - HOU
Nonstop3h 10mSouthwest
jue. 10/21:40 pmHOU - ONT
Nonstop3h 15mSouthwest
Deal found 7/29$191
This American Airlines deal was found by Cheapflights users on 7/28. 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.
jue. 9/410:53 amONT - HOU
1 stop5h 17mAmerican Airlines
dom. 9/76:00 amHOU - ONT
1 stop6h 05mAmerican Airlines
Deal found 7/28$209

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 julio 29, 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

lun. 8/4

6:00 am-7:13 am

Nonstop1h 13m

Las Vegas Harry Reid Intl

mar. 8/5

3:09 pm-4:20 pm

Nonstop1h 11m

$63

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

vie. 8/15

9:41 pm-11:14 pm

Nonstop1h 33m

San Francisco

dom. 8/17

10:11 pm-11:40 pm

Nonstop1h 29m

$74

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

sáb. 8/23

8:50 pm-9:55 pm

Nonstop1h 05m

Las Vegas Harry Reid Intl

mié. 8/27

7:40 pm-8:45 pm

Nonstop1h 05m

$97

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

mar. 8/5

6:10 am-7:37 am

Nonstop1h 27m

San Francisco

mar. 8/5

10:45 am-12:14 pm

Nonstop1h 29m

$99

OntarioPortland

ONT - PDX

ONTPDX

Ontario

lun. 8/25

8:25 am-10:49 am

Nonstop2h 24m

Portland

vie. 8/29

7:04 pm-9:27 pm

Nonstop2h 23m

$110

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

vie. 8/15

10:03 am-12:53 pm

Nonstop2h 50m

Seattle/Tacoma Intl

vie. 8/22

1:20 pm-4:14 pm

Nonstop2h 54m

$141

OntarioPortland

ONT - PDX

ONTPDX

Ontario

sáb. 10/11

11:15 am-1:34 pm

Nonstop2h 19m

Portland

mar. 10/14

2:38 pm-4:53 pm

Nonstop2h 15m

$157

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

mié. 8/27

11:39 am-2:19 pm

Nonstop2h 40m

Seattle/Tacoma Intl

mié. 9/3

7:55 am-10:44 am

Nonstop2h 49m

$157

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

sáb. 9/27

6:00 am-8:45 am

Nonstop2h 45m

Seattle/Tacoma Intl

mar. 9/30

5:20 am-9:26 am

1 stop4h 06m

$167

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

vie. 9/5

11:40 am-2:25 pm

Nonstop2h 45m

Seattle/Tacoma Intl

mar. 9/9

8:05 am-10:50 am

Nonstop2h 45m

$187

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 60 results
1
2
3
...
6

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 julio 29, 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 julio 29, 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

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Southwest
8.0
Very good
4,238 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Delta
8.0
Very good
7,979 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Hawaiian Airlines
7.8
Good
2,605 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
United Airlines
7.4
Good
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

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 $30. 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 - San Francisco, Ontario - Seattle/Tacoma Intl and Ontario - New York John F Kennedy 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, 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to North America

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
Los Angeles to Newark flights
Los Angeles to Haneda flights
Los Angeles to Honolulu flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Seattle flights
San Francisco to Newark flights
San Francisco to Seattle flights
Los Angeles to Narita flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to LaGuardia flights
Ontario to San Francisco flights
Los Angeles to Las Vegas flights
Los Angeles to O'Hare Intl flights
Ontario to Seattle flights
Los Angeles to Cancún flights
Los Angeles to San Francisco flights
Burbank to Las Vegas flights
San Francisco to Haneda flights
San Francisco to Honolulu flights
Ontario to John F Kennedy Intl flights
Los Angeles to Mexico City flights
Santa Ana to Las Vegas flights
San Francisco to LaGuardia flights
Los Angeles to Boston flights
San Francisco to Narita flights
San Francisco to Los Angeles flights
San Jose to Seattle flights
San Francisco to Las Vegas flights
Santa Ana to San Francisco flights
San Jose to Los Angeles flights
Los Angeles to San Jose flights
San Francisco to Ontario flights
San Jose to Las Vegas flights
Ontario to Honolulu flights
Los Angeles to Manila flights
Los Angeles to Suvarnabhumi flights
Los Angeles to Portland flights
Santa Ana to Seattle flights
San Francisco to O'Hare Intl flights
Burbank to Newark flights
Oakland to Las Vegas flights
Los Angeles to Miami flights
Ontario to Newark flights
Los Angeles to Hobby flights
Los Angeles to Oakland flights
San Francisco to Santa Ana flights
San Francisco to Dallas/Fort Worth flights
San Francisco to Cancún flights
Los Angeles to Heathrow flights

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 julio 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$22Average$150FlexibilityNo cancel feeOn-time65%
FrontierCheapest$35Average$173FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$58Average$397FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$67Average$310FlexibilityNo cancel feeOn-time75%
DeltaCheapest$85Average$358FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$97Average$385FlexibilityNo cancel feeOn-time63%
JetBlueCheapest$207Average$338FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$245Average$422FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.