$91+ 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
Sep 19 — Sep 261
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Irvine 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
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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 Irvine
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Best
Last-minute
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Cheapest flights from Ontario to IrvineExplore 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 August 20, 2026.
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 August 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Tue 9/87:56 pm -
1 stop28h 14m
Tue 9/152:01 pm -
1 stop9h 46m
Deal found 8/16![Frontier logo]()
$118
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 9/1611:45 am -
1 stop26h 54m
Wed 10/72:01 pm -
1 stop9h 46m
Deal found 8/17![Frontier logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 9/1012:07 pm -
1 stop10h 15m
Mon 9/148:44 am -
1 stop10h 52m
Deal found 8/20![Frontier logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 8/18. 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.
Tue 9/1511:45 am -
1 stop12h 25m
Tue 9/222:01 pm -
1 stop9h 46m
Deal found 8/18![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 8/17. 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.
Mon 9/146:15 am -
1 stop17h 55m
Mon 9/2110:04 pm -
1 stop11h 05m
Deal found 8/17![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 8/17. 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.
Mon 10/128:35 pm -
1 stop11h 14m
Fri 10/168:44 am -
1 stop10h 56m
Deal found 8/17![Frontier logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 8/19. 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 9/162:30 pm -
2 stops20h 07m
Wed 9/232:01 pm -
1 stop9h 46m
Deal found 8/19![Frontier logo]()
$164
Best flights from Ontario to IrvineDiscover carefully curated flight deals from Ontario to Irvine that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 20, 2026.
Discover carefully curated flight deals from Ontario to Irvine that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 9/1012:07 pm -
1 stop10h 15m
Mon 9/148:44 am -
1 stop10h 52m
Deal found 8/20![Frontier logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Tue 9/83:40 pm -
2 stops20h 10m
Tue 9/152:01 pm -
1 stop9h 46m
Deal found 8/16![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 9/1611:45 am -
1 stop12h 25m
Wed 10/712:45 pm -
2 stops11h 02m
Deal found 8/17![Frontier logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 8/19. 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 9/162:30 pm -
2 stops20h 07m
Wed 9/232:01 pm -
1 stop9h 46m
Deal found 8/19![Frontier logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 8/17. 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.
Sun 9/138:24 pm -
1 stop11h 23m
Mon 9/1410:04 pm -
1 stop11h 05m
Deal found 8/17![Frontier logo]()
$258
This Kiwi.com deal was found by Cheapflights users on 8/17. 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.
Fri 10/912:01 pm -
2 stops22h 23m
Sun 10/119:57 pm -
1 stop9h 07m
Deal found 8/17![Frontier logo]()
$269
This Kiwi.com deal was found by Cheapflights users on 8/19. 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 9/57:56 pm -
2 stops28h 08m
Thu 9/108:44 am -
1 stop10h 52m
Deal found 8/19![Frontier logo]()
$272
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 9/23:13 pm -
2 stops18h 16m
Sun 9/612:07 pm -
1 stop4h 15m
Deal found 8/18![Frontier logo]()
$488
Last-minute flights from Ontario to IrvineDiscover last-minute flight deals from Ontario to Irvine. Data last updated August 20, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Irvine. Data last updated August 20, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Tue 9/87:56 pm -
1 stop28h 14m
Tue 9/152:01 pm -
1 stop9h 46m
Deal found 8/16![Frontier logo]()
$118
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 9/1012:07 pm -
1 stop10h 15m
Mon 9/148:44 am -
1 stop10h 52m
Deal found 8/20![Frontier logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 8/17. 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.
Mon 9/146:15 am -
1 stop17h 55m
Mon 9/2110:04 pm -
1 stop11h 05m
Deal found 8/17![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 8/18. 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.
Tue 9/1511:45 am -
1 stop12h 25m
Tue 9/222:01 pm -
1 stop9h 46m
Deal found 8/18![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 9/1611:45 am -
1 stop26h 54m
Wed 10/72:01 pm -
1 stop9h 46m
Deal found 8/17![Frontier logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 8/19. 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 9/162:30 pm -
2 stops20h 07m
Wed 9/232:01 pm -
1 stop9h 46m
Deal found 8/19![Frontier logo]()
$164
One-way flights from Ontario to IrvineSearch for one-way flight options from Ontario to Irvine. Find affordable one-way fares based on user searches. Data last updated August 20, 2026.
Search for one-way flight options from Ontario to Irvine. Find affordable one-way fares based on user searches. Data last updated August 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/19. 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 9/266:15 am -
1 stop17h 55m
Deal found 8/19![Frontier logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 8/19. 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.
Sun 9/2712:07 pm -
2 stops30h 37m
Deal found 8/19![Frontier logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Mon 8/2410:49 am -
2 stops37h 15m
Deal found 8/16![Frontier logo]()
$183
This Kiwi.com deal was found by Cheapflights users on 8/19. 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.
Mon 8/319:33 am -
2 stops38h 31m
Deal found 8/19![Frontier logo]()
$220
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 9/233:14 pm -
3 stops53h 23m
Deal found 8/17![Multiple Airlines logo]()
$990
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 August 20, 2026.
Round-trip from | $118 (Kiwi.com) |
|---|---|
One-way from | $91 (Kiwi.com) |
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 7,457,451 searches. Data last updated August 20, 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
Cheapest round-trip
Quickest round-trip
OntarioLos Angeles
ONT Ontario - LAX Los Angeles Los Angeles
ONTLAX
Ontario
Thu 9/10
12:07 pm-10:22 pm
1 stop10h 15m
Los Angeles Los Angeles
Mon 9/14
8:44 am-7:36 pm
1 stop10h 52m
$125
OntarioLos Angeles
ONT Ontario - LAX Los Angeles Los Angeles
ONTLAX
Ontario
Tue 9/8
3:40 pm-11:50 am
2 stops20h 10m
Los Angeles Los Angeles
Tue 9/15
2:01 pm-11:47 pm
1 stop9h 46m
$152
OntarioLos Angeles
ONT Ontario - LAX Los Angeles Los Angeles
ONTLAX
Ontario
Wed 9/16
11:45 am-12:10 am
1 stop12h 25m
Los Angeles Los Angeles
Wed 10/7
12:45 pm-11:47 pm
2 stops11h 02m
$161
OntarioLos Angeles
ONT Ontario - LAX Los Angeles Los Angeles
ONTLAX
Ontario
Wed 9/16
2:30 pm-10:37 am
2 stops20h 07m
Los Angeles Los Angeles
Wed 9/23
2:01 pm-11:47 pm
1 stop9h 46m
$164
OntarioLos Angeles
ONT Ontario - LAX Los Angeles Los Angeles
ONTLAX
Ontario
Sun 9/13
8:24 pm-7:47 am
1 stop11h 23m
Los Angeles Los Angeles
Mon 9/14
10:04 pm-9:09 am
1 stop11h 05m
$258
OntarioLos Angeles
ONT Ontario - LAX Los Angeles Los Angeles
ONTLAX
Ontario
Fri 10/9
12:01 pm-10:24 am
2 stops22h 23m
Los Angeles Los Angeles
Sun 10/11
9:57 pm-7:04 am
1 stop9h 07m
$269
OntarioLos Angeles
ONT Ontario - LAX Los Angeles Los Angeles
ONTLAX
Ontario
Sat 9/5
7:56 pm-12:04 am
2 stops28h 08m
Los Angeles Los Angeles
Thu 9/10
8:44 am-7:36 pm
1 stop10h 52m
$272
OntarioLos Angeles
ONT Ontario - LAX Los Angeles Los Angeles
ONTLAX
Ontario
Wed 9/2
3:13 pm-9:29 am
2 stops18h 16m
Los Angeles Los Angeles
Sun 9/6
12:07 pm-4:22 pm
1 stop4h 15m
$488
Cheapest one-way
Quickest one-way
OntarioLos Angeles
ONT Ontario - LAX Los Angeles Los Angeles
ONTLAX
Ontario
Sun 9/27
8:24 pm-7:47 am
1 stop11h 23m
$121
OntarioLos Angeles
ONT Ontario - LAX Los Angeles Los Angeles
ONTLAX
Ontario
Mon 8/24
10:49 am-12:04 am
2 stops37h 15m
$183
Showing 1-10 of 12 resultsSorted by cheapest first
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.
ONT-LAX
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
ONT-IR9
ONT-LAX
No data available for this route at this time. Please check back soon.
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