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$63+ Cheap flights from Ontario (ONT) to Irvine, CA

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 1/19. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
Jan 20 — Jan 271
Tue 1/20
Tue 1/27
1 adult, Economy
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Cheap flight deals from Ontario to Irvine

Cheapest flights from Ontario to Irvine
Explore the most affordable flight options available from Ontario to Irvine. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 21, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/17. 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.
Wed 12/316:00 amONT - LAX
1 stop14h 31mMultiple Airlines
Fri 1/169:17 amLAX - ONT
1 stop8h 27mMultiple Airlines
Deal found 12/17$161
This Kiwi.com deal was found by Cheapflights users on 12/20. 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.
Sat 12/275:16 pmONT - LAX
1 stop14h 02mMultiple Airlines
Thu 1/19:58 pmLAX - ONT
1 stop23h 19mMultiple Airlines
Deal found 12/20$209
This Kiwi.com deal was found by Cheapflights users on 12/20. 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 12/256:00 amONT - LAX
1 stop6h 16mFrontier
Thu 1/19:58 pmLAX - ONT
1 stop23h 19mFrontier
Deal found 12/20$303
This Kiwi.com deal was found by Cheapflights users on 12/20. 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.
Wed 12/246:00 pmONT - LAX
1 stop18h 16mMultiple Airlines
Fri 12/269:20 pmLAX - ONT
1 stop26h 01mMultiple Airlines
Deal found 12/20$315
This Kiwi.com deal was found by Cheapflights users on 12/20. 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 12/256:00 amONT - LAX
1 stop6h 16mMultiple Airlines
Fri 12/269:20 pmLAX - ONT
1 stop26h 01mMultiple Airlines
Deal found 12/20$332
This Kiwi.com deal was found by Cheapflights users on 12/20. 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.
Sat 12/276:00 amONT - LAX
1 stop14h 31mFrontier
Thu 1/13:58 pmLAX - ONT
2 stops15h 21mFrontier
Deal found 12/20$403
This Kiwi.com deal was found by Cheapflights users on 12/20. 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 12/256:00 amONT - LAX
1 stop6h 16mFrontier
Fri 12/2611:59 pmLAX - ONT
2 stops48h 00mFrontier
Deal found 12/20$660

Find flight deals from Ontario to Irvine

Keep the following information in mind while searching for Ontario to Irvine flight deals. Data was last updated December 21, 2025.

Round-trip from

$127
(Kiwi.com)

One-way from

$63
(Kiwi.com)
From Ontario to Irvine
Search Deals
One-way flight from Ontario to Irvine
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Irvine 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 December 21, 2025.
Use the filters below to find and compare flights from Ontario to Irvine that are best for you.

Fly from

Ontario

Fly to

Irvine

Route

Depart

Return

Price

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Thu 1/22

11:04 am-3:12 pm

1 stop4h 08m

Los Angeles

Mon 1/26

9:17 am-2:41 pm

1 stop5h 24m

$127

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Mon 1/19

10:18 pm-8:22 am

1 stop10h 04m

Los Angeles

Mon 1/26

9:17 am-2:41 pm

1 stop5h 24m

$128

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sun 1/18

10:18 pm-8:20 am

1 stop10h 02m

Los Angeles

Sun 1/25

5:01 pm-12:10 pm

1 stop19h 09m

$130

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sat 1/17

9:10 pm-8:20 am

1 stop11h 10m

Los Angeles

Sat 1/24

7:00 am-11:24 pm

1 stop16h 24m

$132

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Fri 1/30

10:18 am-3:12 pm

1 stop4h 54m

Los Angeles

Mon 2/2

9:17 am-2:41 pm

1 stop5h 24m

$144

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Fri 1/16

10:18 pm-7:22 pm

1 stop21h 04m

Los Angeles

Fri 1/23

2:04 pm-7:53 pm

1 stop5h 49m

$146

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sun 1/18

10:18 pm-8:20 am

1 stop10h 02m

Los Angeles

Sun 1/25

5:13 pm-1:37 pm

2 stops44h 24m

$149

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Tue 2/10

8:36 am-11:18 pm

1 stop14h 42m

$67

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sun 1/18

2:34 pm-8:20 am

1 stop17h 46m

$68

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Tue 1/20

7:15 am-11:31 pm

1 stop16h 16m

$68

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/20

Showing 1-10 of 19 results
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Best time to book a flight from Ontario to Irvine

Have a flexible travel schedule? Discover the best time to fly to Irvine 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 Irvine

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

Currently, March is the cheapest month in which you can book a flight from Ontario to Irvine (average of $100). Flying from Ontario to Irvine in August is currently the most expensive (average of $444). 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.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Irvine. 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 Irvine?

    Located just 3.1 mi from the city center, Ontario is the airport most travelers will use when flying to Irvine from Ontario. Booking flights from Ontario (ONT) to Irvine should be relatively easy as there are 0 daily outbound flights to Irvine from 0 different airlines.

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

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

  • How can I find direct flights from Ontario to Irvine?

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

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

    Yes. Cheapflights offers flight deals from Ontario to Irvine 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 Irvine?

    Currently, March is the cheapest month in which you can book a flight from Ontario to Irvine (average of $100). Flying from Ontario to Irvine in August is currently the most expensive (average of $444). 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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