HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$23+ Cheap flights from North America to Ontario (ONT)

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 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ONT
dic. 6 — dic. 131
sáb. 12/6
sáb. 12/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from North America to Ontario 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 North America to Ontario

Keep the following information in mind while searching for North America to Ontario flight deals. Data was last updated noviembre 6, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$81
(eDestinos)

One-way from

$23
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$367

Good round-trip deal

$67 or less

Good one-way deal

$74 or less
Provider with most accurate pricing for New York (NYC)-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for New York (NYC)-Los Angeles flights.
Search Deals
From North America to Ontario
Search Deals
One-way flight from North America to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($25 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from North America to Ontario.
Search Deals
Price to beat on a one-way flight from North America to Ontario.
Search Deals

Find flight deals from North America to Ontario

Cheapest flights from North America to Ontario
Explore the most affordable flight options available from North America to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on noviembre 6, 2025.

This eDestinos deal was found by Cheapflights users on 11/5. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/1212:58 pmDEN - ONT
Nonstop2h 27mFrontier
lun. 12/153:20 pmONT - DEN
Nonstop2h 20mFrontier
Deal found 11/5$81
This Booking.com deal was found by Cheapflights users on 11/4. 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.
jue. 11/135:23 pmIAH - ONT
Nonstop3h 26mFrontier
lun. 11/171:46 pmONT - IAH
Nonstop3h 25mFrontier
Deal found 11/4$82
This Frontier deal was found by Cheapflights users on 11/4. 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.
mié. 12/2410:32 pmDEN - ONT
Nonstop2h 27mFrontier
dom. 2/16:00 amONT - DEN
Nonstop2h 26mFrontier
Deal found 11/4$82
This Frontier deal was found by Cheapflights users on 11/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/1710:21 pmSFO - ONT
Nonstop1h 29mFrontier
lun. 11/249:59 pmONT - SFO
Nonstop1h 30mFrontier
Deal found 11/3$83
This Frontier deal was found by Cheapflights users on 11/4. 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.
jue. 12/49:03 pmSFO - ONT
Nonstop1h 26mFrontier
mié. 12/106:15 amONT - SFO
1 stop10h 36mFrontier
Deal found 11/4$84
This Frontier deal was found by Cheapflights users on 11/4. 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.
lun. 12/159:59 amDEN - ONT
1 stop5h 05mFrontier
jue. 1/86:00 amONT - DEN
Nonstop2h 26mFrontier
Deal found 11/4$84
This Flightnetwork deal was found by Cheapflights users on 11/4. 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.
jue. 12/116:00 amSFO - ONT
1 stop15h 17mFrontier
lun. 12/1510:12 pmONT - SFO
Nonstop1h 40mFrontier
Deal found 11/4$85
This Super.com deal was found by Cheapflights users on 11/5. 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.
jue. 11/135:23 pmIAH - ONT
Nonstop3h 26mFrontier
mié. 11/1912:58 amONT - IAH
1 stop7h 55mFrontier
Deal found 11/5$86
This eDestinos deal was found by Cheapflights users on 11/4. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/1212:58 pmDEN - ONT
Nonstop2h 27mFrontier
dom. 12/144:01 pmONT - DEN
Nonstop2h 21mFrontier
Deal found 11/4$86
This Super.com deal was found by Cheapflights users on 11/6. 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.
jue. 12/119:42 amDEN - ONT
Nonstop2h 27mFrontier
dom. 12/144:01 pmONT - DEN
Nonstop2h 21mFrontier
Deal found 11/6$87
This Frontier deal was found by Cheapflights users on 11/5. 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.
lun. 11/1710:21 pmSFO - ONT
Nonstop1h 29mFrontier
vie. 12/510:12 pmONT - SFO
Nonstop1h 40mFrontier
Deal found 11/5$88
This Frontier deal was found by Cheapflights users on 11/4. 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.
jue. 12/49:42 amDEN - ONT
Nonstop2h 27mFrontier
dom. 12/74:01 pmONT - DEN
Nonstop2h 21mFrontier
Deal found 11/4$88

Cheapflights Fare Finder

 
Customize your flight search to find flights from North America to Ontario 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 noviembre 6, 2025.
Use the filters below to find and compare flights from North America to Ontario that are best for you.

Fly from

North America

Fly to

Ontario

Route

Depart

Return

Price

DallasOntario

DFW - ONT

DFWONT

Dallas/Fort Worth

jue. 12/11

10:38 pm-2:25 pm

1 stop17h 47m

Ontario

mar. 12/16

12:30 pm-5:35 pm

Nonstop3h 05m

$102

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

mié. 12/3

4:32 pm-11:09 am

1 stop20h 37m

Ontario

lun. 12/8

2:59 pm-8:21 pm

Nonstop3h 22m

$102

DenverOntario

DEN - ONT

DENONT

Denver Intl

mié. 1/7

1:10 pm-2:35 pm

Nonstop2h 25m

Ontario

mié. 1/14

2:25 pm-5:35 pm

Nonstop2h 10m

$117

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

mar. 12/9

5:00 pm-11:58 pm

1 stop6h 58m

Ontario

sáb. 12/13

5:49 pm-8:49 pm

Nonstop3h 00m

$129

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

vie. 2/27

7:00 pm-11:53 pm

1 stop4h 53m

Ontario

sáb. 2/28

7:30 am-10:36 am

Nonstop3h 06m

$129

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

mié. 12/10

2:19 pm-5:07 pm

Nonstop2h 48m

Ontario

lun. 12/15

1:29 pm-6:36 pm

1 stop5h 07m

$129

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

jue. 12/11

7:11 pm-11:58 pm

1 stop4h 47m

Ontario

lun. 12/15

5:49 pm-8:49 pm

Nonstop3h 00m

$129

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

jue. 12/4

5:00 pm-11:58 pm

1 stop6h 58m

Ontario

mié. 12/10

12:40 pm-3:37 pm

Nonstop2h 57m

$129

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

jue. 12/4

5:00 pm-11:58 pm

1 stop6h 58m

Ontario

mar. 12/9

6:40 am-9:45 am

Nonstop3h 05m

$129

San FranciscoOntario

SFO - ONT

SFOONT

San Francisco

mié. 12/3

10:55 am-12:17 pm

Nonstop1h 22m

Ontario

dom. 12/7

6:00 am-7:24 am

Nonstop1h 24m

$137

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

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

Best time to book a flight from North America to Ontario

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

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

Currently, February is the cheapest month in which you can book a flight from North America to Ontario (average of $19). Flying from North America to Ontario in September is currently the most expensive (average of $48). 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 NA to ONT?

Find hourly flight availability from North America to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated noviembre 6, 2025.

One of the essential ways to save on airfare from North America to Ontario is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 12% on airfare.

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

Use this chart to determine the cheapest time to fly round-trip from North America to Ontario. Price data was last updated on November 2, 2025.

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

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated noviembre 6, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from North America to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,241 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

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
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

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
8,001 reviews
Southwest
8.0
Very good
4,241 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

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
9,007 reviews
Southwest
8.0
Very good
4,241 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

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
11,040 reviews
Southwest
8.0
Very good
4,241 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

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
3,115 reviews
Southwest
8.0
Very good
4,241 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

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 North America to Ontario. 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 into for flights to Ontario from North America?

    If you book a flight to Ontario from North America, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

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

    There are many flights that can get you from North America to Ontario in 2h 25m. Fly via Frontier, Southwest, or Delta to get the fastest option. The distance from North America to Ontario is about 817 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airlines for a one-way flight from North America to Ontario are Frontier ($24), United Airlines ($39), and Southwest ($59).

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

    The most popular flight routes from North America to Ontario are San Francisco - Ontario, Seattle/Tacoma Intl - Ontario and Dallas/Fort Worth - Ontario.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from North America to Ontario (average of $19). Flying from North America to Ontario in September is currently the most expensive (average of $48). 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 North America to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Los Angeles flights
John F Kennedy Intl to Las Vegas flights
Newark to Los Angeles flights
John F Kennedy Intl to San Francisco flights
San Francisco to Los Angeles flights
Dallas/Fort Worth to Las Vegas flights
Newark to Las Vegas flights
Seattle to Los Angeles flights
San Francisco to Las Vegas flights
O'Hare Intl to Las Vegas flights
Dallas/Fort Worth to Los Angeles flights
Seattle to Las Vegas flights
Newark to San Francisco flights
Ontario to San Francisco flights
LaGuardia to Los Angeles flights
Los Angeles to San Francisco flights
Santa Ana to San Francisco flights
San Francisco to Santa Ana flights
Dulles Intl to Las Vegas flights
San Francisco to Ontario flights
O'Hare Intl to Los Angeles flights
Denver to Las Vegas flights
Dallas/Fort Worth to San Francisco flights
Boston to Los Angeles flights
Reagan-National to Los Angeles flights
LaGuardia to Las Vegas flights
Boston to Las Vegas flights
Seattle to San Diego flights
Los Angeles to Las Vegas flights
Los Angeles to San Jose flights
Dulles Intl to Los Angeles flights
Minneapolis to Las Vegas flights
Reagan-National to Las Vegas flights
San Jose to Las Vegas flights
Seattle to Santa Ana flights
Seattle to San Francisco flights
Baltimore to Las Vegas flights
LaGuardia to San Francisco flights
Seattle to Ontario flights
Hobby to Las Vegas flights
Baltimore to Los Angeles flights
Atlanta to Las Vegas flights
Detroit to Las Vegas flights
Atlanta to Los Angeles flights
John F Kennedy Intl to San Diego flights
O'Hare Intl to San Francisco flights
Orlando to Las Vegas flights
Cleveland to Las Vegas flights
Burbank to Las Vegas flights
Minneapolis to Los Angeles flights

Top 8 airlines flying from North America to Ontario

Discover the top 8 airlines that operate flights from North America to Ontario. 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 noviembre 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$38Average$196FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$44Average$155FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$58Average$349FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$59Average$185FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$84Average$352FlexibilityNo cancel feeOn-time63%
DeltaCheapest$108Average$416FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$186Average$374FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$250Average$338FlexibilityNo cancel feeOn-time62%

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.