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Ontario

$44+ 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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ONT
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
1 adult, Economy
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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 April 15, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$57
(Cheapflightsfares)

One-way from

$44
(Priceline)

Popular in

December

Cheapest in

September

Average price

$407

Good round-trip deal

$80 or less

Good one-way deal

$39 or less
Provider with most accurate pricing for New York (NYC)-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for New York (NYC)-Los Angeles flights.
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From North America to Ontario
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One-way flight from North America to Ontario
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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 ($10 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from North America to Ontario.
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Price to beat on a one-way flight from North America to Ontario.
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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 April 15, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/15. 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.
Thu 5/18:34 amSFO - ONT
Nonstop1h 28mFrontier
Mon 5/58:24 amONT - SFO
Nonstop1h 38mFrontier
Deal found 4/15$57
This Frontier deal was found by Cheapflights users on 4/14. 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 5/99:50 amDEN - ONT
Nonstop2h 25mFrontier
Sun 5/1112:59 amONT - DEN
Nonstop2h 18mFrontier
Deal found 4/14$78
This Cheapflightsfares deal was found by Cheapflights users on 4/14. 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.
Sat 5/104:27 pmDFW - ONT
Nonstop3h 20mFrontier
Tue 5/133:05 pmONT - DFW
Nonstop3h 15mFrontier
Deal found 4/14$81
This United Airlines deal was found by Cheapflights users on 4/14. 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.
Thu 6/510:45 amSFO - ONT
Nonstop1h 29mUnited Airlines
Sat 6/71:36 pmONT - SFO
Nonstop1h 27mUnited Airlines
Deal found 4/14$90
This Frontier deal was found by Cheapflights users on 4/14. 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.
Sat 6/71:50 pmSEA - ONT
Nonstop2h 40mFrontier
Thu 6/1210:03 amONT - SEA
Nonstop2h 46mFrontier
Deal found 4/14$98
This Cheapflightsfares deal was found by Cheapflights users on 4/14. 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.
Fri 5/912:08 pmIAH - ONT
Nonstop3h 30mFrontier
Sun 5/112:06 pmONT - IAH
Nonstop3h 31mFrontier
Deal found 4/14$122
This Expedia deal was found by Cheapflights users on 4/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/213:53 pmSEA - ONT
Nonstop2h 32mMultiple Airlines
Tue 6/311:33 amONT - SEA
Nonstop2h 47mMultiple Airlines
Deal found 4/14$128
This Southwest deal was found by Cheapflights users on 4/13. 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.
Fri 5/169:40 pmDEN - ONT
Nonstop2h 20mSouthwest
Sat 5/178:55 amONT - DEN
Nonstop2h 15mSouthwest
Deal found 4/13$137
This Delta deal was found by Cheapflights users on 4/14. 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.
Tue 5/68:20 amSEA - ONT
Nonstop2h 45mDelta
Tue 5/65:30 pmONT - SEA
Nonstop2h 55mDelta
Deal found 4/14$157
This Southwest deal was found by Cheapflights users on 4/14. 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.
Mon 4/215:10 amSFO - ONT
1 stop5h 50mSouthwest
Tue 4/224:30 pmONT - SFO
1 stop6h 25mSouthwest
Deal found 4/14$157
This United Airlines deal was found by Cheapflights users on 4/14. 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.
Mon 5/511:15 amDEN - ONT
Nonstop2h 23mUnited Airlines
Mon 5/124:15 pmONT - DEN
Nonstop2h 20mUnited Airlines
Deal found 4/14$167
This United Airlines deal was found by Cheapflights users on 4/13. 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.
Thu 5/85:05 amSEA - ONT
1 stop7h 19mUnited Airlines
Tue 5/131:45 pmONT - SEA
1 stop7h 46mUnited Airlines
Deal found 4/13$172

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 April 15, 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

San FranciscoOntario

SFO - ONT

SFOONT

San Francisco

Thu 5/1

8:34 am-10:02 am

Nonstop1h 28m

Ontario

Mon 5/5

8:24 am-10:02 am

Nonstop1h 38m

$57

DenverOntario

DEN - ONT

DENONT

Denver Intl

Fri 5/9

9:50 am-11:15 am

Nonstop2h 25m

Ontario

Sun 5/11

12:59 am-4:17 am

Nonstop2h 18m

$78

DallasOntario

DFW - ONT

DFWONT

Dallas/Fort Worth

Sat 5/10

4:27 pm-5:47 pm

Nonstop3h 20m

Ontario

Tue 5/13

3:05 pm-8:20 pm

Nonstop3h 15m

$81

San FranciscoOntario

SFO - ONT

SFOONT

San Francisco

Thu 6/5

10:45 am-12:14 pm

Nonstop1h 29m

Ontario

Sat 6/7

1:36 pm-3:03 pm

Nonstop1h 27m

$90

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Sat 6/7

1:50 pm-4:30 pm

Nonstop2h 40m

Ontario

Sun 6/15

10:03 am-12:49 pm

Nonstop2h 46m

$98

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Fri 5/9

12:08 pm-1:38 pm

Nonstop3h 30m

Ontario

Sun 5/11

2:06 pm-7:37 pm

Nonstop3h 31m

$122

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Wed 5/21

3:53 pm-6:25 pm

Nonstop2h 32m

Ontario

Tue 6/3

11:33 am-2:20 pm

Nonstop2h 47m

$128

DenverOntario

DEN - ONT

DENONT

Denver Intl

Fri 5/16

9:40 pm-11:00 pm

Nonstop2h 20m

Ontario

Sat 5/17

8:55 am-12:10 pm

Nonstop2h 15m

$137

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Tue 5/6

7:59 pm-10:43 pm

Nonstop2h 44m

Ontario

Sat 5/10

7:05 pm-10:07 pm

Nonstop3h 02m

$157

DenverOntario

DEN - ONT

DENONT

Denver Intl

Mon 5/5

11:15 am-12:38 pm

Nonstop2h 23m

Ontario

Mon 5/12

4:15 pm-7:35 pm

Nonstop2h 20m

$167

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

Showing 1-10 of 60 results
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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, August is the cheapest month in which you can book a flight from North America to Ontario (average of $246). Flying from North America to Ontario in March is currently the most expensive (average of $328). 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 April 15, 2025.

When flying from North America to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 April 15, 2025.
Alaska Airlines
8.0
Very good
9,871 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,871 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Southwest
8.0
Very good
4,278 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,917 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Hawaiian Airlines
7.9
Good
2,374 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,656 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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.

  • 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 ($44), United Airlines ($59), and Southwest ($69).

  • 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, New York John F Kennedy Intl - Ontario and Newark - 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, August is the cheapest month in which you can book a flight from North America to Ontario (average of $246). Flying from North America to Ontario in March is currently the most expensive (average of $328). 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 North America to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from North America to Ontario

Discover the top 10 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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$23Average$172FlexibilityNo cancel feeOn-time65%
FrontierCheapest$38Average$169FlexibilityNo cancel feeOn-time62%
DeltaCheapest$58Average$369FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$59Average$234FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$76Average$401FlexibilityNo cancel feeOn-time69%
Breeze AirwaysCheapest$78Average$110FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$88Average$242FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$97Average$335FlexibilityNo cancel feeOn-time63%
JetBlueCheapest$176Average$371FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$230Average$407FlexibilityNo cancel feeOn-time71%

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