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$136+ 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 8/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
Aug 5 — Aug 121
Wed 8/5
Wed 8/12
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 July 6, 2026.

This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/128:58 am
ONT
-
LAX
1 stop12h 56m
Frontier
Sat 8/156:30 am
LAX
-
ONT
1 stop8h 44m
Frontier
Deal found 7/2$151
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/12:26 pm
ONT
-
LAX
1 stop6h 35m
Frontier
Tue 10/611:47 am
LAX
-
ONT
1 stop4h 23m
Frontier
Deal found 7/1$201
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/128:58 am
ONT
-
LAX
1 stop12h 56m
Frontier
Sun 8/167:07 pm
LAX
-
ONT
1 stop15h 55m
Frontier
Deal found 7/2$214
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/313:40 pm
ONT
-
LAX
1 stop23h 25m
Frontier
Fri 8/77:52 pm
LAX
-
ONT
1 stop15h 10m
Frontier
Deal found 7/3$237
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/158:58 am
ONT
-
LAX
1 stop12h 50m
Frontier
Mon 8/178:49 pm
LAX
-
ONT
1 stop13h 15m
Frontier
Deal found 7/3$247
This Kiwi.com deal was found by Cheapflights users on 7/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2110:17 pm
ONT
-
LAX
1 stop11h 12m
Frontier
Mon 8/247:07 pm
LAX
-
ONT
1 stop18h 56m
Frontier
Deal found 7/4$248
This Kiwi.com deal was found by Cheapflights users on 7/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/18:58 am
ONT
-
LAX
1 stop13h 01m
Frontier
Sat 8/86:30 am
LAX
-
ONT
1 stop8h 44m
Frontier
Deal found 7/4$260

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 July 6, 2026.

Round-trip from

$151
(Kiwi.com)

One-way from

$136
(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 July 6, 2026.
Use the filters below to find and compare flights from Ontario to Irvine that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Wed 8/12

8:58 am-9:54 pm

1 stop12h 56m

Los Angeles

Sat 8/15

6:30 am-3:14 pm

1 stop8h 44m

$226

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Fri 7/31

3:40 pm-3:05 pm

1 stop23h 25m

Los Angeles

Fri 8/7

7:52 pm-11:02 am

1 stop15h 10m

$237

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sat 8/15

8:58 am-9:48 pm

1 stop12h 50m

Los Angeles

Mon 8/17

8:49 pm-10:04 am

1 stop13h 15m

$247

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Fri 8/21

10:17 pm-9:29 am

1 stop11h 12m

Los Angeles

Mon 8/24

7:07 pm-2:03 pm

1 stop18h 56m

$248

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sat 8/1

8:58 am-9:59 pm

1 stop13h 01m

Los Angeles

Sat 8/8

6:30 am-3:14 pm

1 stop8h 44m

$260

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Wed 8/5

5:08 pm-9:48 pm

2 stops28h 40m

Los Angeles

Tue 8/11

6:30 am-3:14 pm

1 stop8h 44m

$315

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sun 8/2

3:40 pm-9:25 am

1 stop17h 45m

Los Angeles

Sun 8/9

7:07 pm-11:02 am

1 stop15h 55m

$333

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Wed 8/12

8:58 am-9:54 pm

1 stop12h 56m

Los Angeles

Fri 8/14

6:30 am-3:54 pm

1 stop9h 24m

$337
Cheapest one-way

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Mon 8/3

3:40 pm-9:25 am

1 stop17h 45m

$136
Quickest one-way

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Thu 7/30

8:58 am-9:59 pm

1 stop13h 01m

$183

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 17 resultsSorted by cheapest first
1
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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
No data available for this route at this time. Please check back soon.

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.

  • How long is the flight from Ontario to Irvine?

    There are many flights that can get you from Ontario to Irvine in 12h 56m. Fly via Frontier to get the fastest option. There are 47 mi between Ontario and Irvine.

  • 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.

See more FAQs

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