$163+ Cheap flights from St. Louis (STL) 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 8/29. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LAX
Sep 1 — Sep 81
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from St. Louis 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
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.Cheapflights Tip: The best prices from Lambert-St Louis to Irvine are usually found in October or September, booked 61 days in advance, depart on a Friday or Thursday and return on a Thursday
Cheap flight deals from St. Louis to Irvine
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to IrvineExplore the most affordable flight options available from St. Louis to Irvine. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 2, 2026.
Explore the most affordable flight options available from St. Louis to Irvine. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 8/286:45 pm
STL
- LAX
1 stop16h 44m
Frontier
Sun 8/306:30 am
LAX
- STL
1 stop10h 43m
Frontier
Deal found 7/31![Frontier logo]()
$316
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 8/286:45 pm
STL
- LAX
1 stop16h 44m
Frontier
Fri 9/411:20 pm
LAX
- STL
1 stop14h 51m
Frontier
Deal found 7/31![Frontier logo]()
$317
This Frontier deal was found by Cheapflights users on 7/30. 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.
Thu 8/207:58 pm
STL
- LAX
1 stop6h 13m
Frontier
Sun 8/236:55 am
LAX
- STL
1 stop8h 55m
Frontier
Deal found 7/30![Frontier logo]()
$318
This Frontier deal was found by Cheapflights users on 7/31. 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.
Wed 8/266:45 pm
STL
- LAX
1 stop5h 54m
Frontier
Fri 8/2811:20 pm
LAX
- STL
1 stop14h 51m
Frontier
Deal found 7/31![Frontier logo]()
$319
This CheapOair deal was found by Cheapflights users on 7/31. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:17 pm
STL
- LAX
1 stop28h 44m
Frontier
Fri 9/182:28 pm
LAX
- STL
1 stop26h 49m
Frontier
Deal found 7/31![Frontier logo]()
$322
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/158:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Wed 8/1911:20 pm
LAX
- STL
2 stops16h 02m
Frontier
Deal found 7/29![Frontier logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/128:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Wed 8/1911:20 pm
LAX
- STL
2 stops16h 02m
Frontier
Deal found 7/29![Frontier logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 8/2. 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.
Mon 8/317:58 pm
STL
- LAX
1 stop14h 57m
Frontier
Mon 9/710:22 pm
LAX
- STL
1 stop17h 28m
Frontier
Deal found 8/2![Frontier logo]()
$326
This Frontier deal was found by Cheapflights users on 7/31. 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 10/306:49 pm
STL
- LAX
1 stop6h 39m
Frontier
Mon 11/27:00 am
LAX
- STL
1 stop8h 54m
Frontier
Deal found 7/31![Frontier logo]()
$328
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/186:45 pm
STL
- LAX
1 stop5h 54m
Frontier
Sat 8/2211:20 pm
LAX
- STL
2 stops40h 02m
Frontier
Deal found 7/30![Frontier logo]()
$330
This deal was found by Cheapflights users on 7/29. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/148:10 pm
STL
- LAX
1 stop6h 00m
Frontier
Mon 9/2811:36 am
LAX
- STL
1 stop5h 41m
Frontier
Deal found 7/29![Frontier logo]()
$331
Best flights from St. Louis to IrvineDiscover carefully curated flight deals from St. Louis to Irvine that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 2, 2026.
Discover carefully curated flight deals from St. Louis to Irvine that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 2, 2026.
This Southwest deal was found by Cheapflights users on 8/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:20 pm
STL
- LAX
1 stop5h 30m
Southwest
Thu 11/57:00 pm
LAX
- STL
Nonstop3h 25m
Southwest
Deal found 8/1![Southwest logo]()
$347
This Delta deal was found by Cheapflights users on 7/28. 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.
Fri 8/282:32 pm
STL
- LAX
2 stops10h 13m
Delta
Mon 8/3111:35 am
LAX
- STL
1 stop7h 25m
Delta
Deal found 7/28![Delta logo]()
$395
This Southwest deal was found by Cheapflights users on 7/28. 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 9/149:05 pm
STL
- LAX
Nonstop4h 00m
Southwest
Mon 9/283:25 pm
LAX
- STL
1 stop5h 50m
Southwest
Deal found 7/28![Southwest logo]()
$347
This Southwest deal was found by Cheapflights users on 8/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/89:55 pm
STL
- LAX
Nonstop4h 00m
Southwest
Sat 10/106:00 am
LAX
- STL
Nonstop3h 30m
Southwest
Deal found 8/1![Southwest logo]()
$357
This Southwest deal was found by Cheapflights users on 8/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/89:55 pm
STL
- LAX
Nonstop4h 00m
Southwest
Mon 10/124:30 pm
LAX
- STL
1 stop5h 25m
Southwest
Deal found 8/1![Southwest logo]()
$367
This Delta deal was found by Cheapflights users on 7/28. 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 1/1212:30 pm
STL
- LAX
1 stop6h 21m
Delta
Sun 1/3111:45 pm
LAX
- STL
1 stop8h 53m
Delta
Deal found 7/28![Delta logo]()
$448
This Southwest deal was found by Cheapflights users on 8/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:25 am
STL
- LAX
Nonstop3h 55m
Southwest
Mon 9/77:10 pm
LAX
- STL
Nonstop3h 40m
Southwest
Deal found 8/1![Southwest logo]()
$422
This Southwest deal was found by Cheapflights users on 7/31. 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.
Wed 1/134:10 pm
STL
- LAX
2 stops8h 10m
Southwest
Fri 1/155:50 pm
LAX
- STL
Nonstop3h 25m
Southwest
Deal found 7/31![Southwest logo]()
$443
This Southwest deal was found by Cheapflights users on 7/29. 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.
Thu 10/89:55 pm
STL
- LAX
Nonstop4h 00m
Southwest
Sun 10/115:10 am
LAX
- STL
Nonstop3h 30m
Southwest
Deal found 7/29![Southwest logo]()
$445
This Southwest deal was found by Cheapflights users on 7/30. 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.
Tue 8/189:00 pm
STL
- LAX
Nonstop3h 55m
Southwest
Sat 8/226:00 am
LAX
- STL
Nonstop3h 40m
Southwest
Deal found 7/30![Southwest logo]()
$453
This Southwest deal was found by Cheapflights users on 7/31. 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 8/176:25 am
STL
- LAX
Nonstop3h 55m
Southwest
Fri 8/217:10 pm
LAX
- STL
Nonstop3h 35m
Southwest
Deal found 7/31![Southwest logo]()
$514
This Southwest deal was found by Cheapflights users on 7/31. 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.
Wed 11/2510:35 am
STL
- LAX
2 stops8h 10m
Southwest
Mon 11/3011:10 pm
LAX
- STL
1 stop6h 30m
Southwest
Deal found 7/31![Southwest logo]()
$514
Last-minute flights from St. Louis to IrvineDiscover last-minute flight deals from St. Louis to Irvine. Data last updated August 2, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Irvine. Data last updated August 2, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/128:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Wed 8/1911:20 pm
LAX
- STL
2 stops16h 02m
Frontier
Deal found 7/29![Frontier logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/158:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Wed 8/1911:20 pm
LAX
- STL
2 stops16h 02m
Frontier
Deal found 7/29![Frontier logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/186:45 pm
STL
- LAX
1 stop5h 54m
Frontier
Sat 8/2211:20 pm
LAX
- STL
2 stops40h 02m
Frontier
Deal found 7/30![Frontier logo]()
$330
This Frontier deal was found by Cheapflights users on 7/30. 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.
Thu 8/207:58 pm
STL
- LAX
1 stop6h 13m
Frontier
Sun 8/236:55 am
LAX
- STL
1 stop8h 55m
Frontier
Deal found 7/30![Frontier logo]()
$318
This Southwest deal was found by Cheapflights users on 7/29. 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.
Thu 8/206:25 am
STL
- LAX
Nonstop3h 55m
Southwest
Wed 8/266:50 am
LAX
- STL
Nonstop3h 35m
Southwest
Deal found 7/29![Southwest logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/206:45 pm
STL
- LAX
1 stop5h 54m
Frontier
Wed 8/2611:41 pm
LAX
- STL
2 stops14h 50m
Frontier
Deal found 7/29![Frontier logo]()
$338
This Frontier deal was found by Cheapflights users on 7/31. 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.
Wed 8/266:45 pm
STL
- LAX
1 stop5h 54m
Frontier
Fri 8/2811:20 pm
LAX
- STL
1 stop14h 51m
Frontier
Deal found 7/31![Frontier logo]()
$319
This Frontier deal was found by Cheapflights users on 8/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/266:45 pm
STL
- LAX
1 stop5h 54m
Frontier
Sun 8/306:30 am
LAX
- STL
1 stop10h 43m
Frontier
Deal found 8/1![Frontier logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 8/286:45 pm
STL
- LAX
1 stop16h 44m
Frontier
Sun 8/306:30 am
LAX
- STL
1 stop10h 43m
Frontier
Deal found 7/31![Frontier logo]()
$316
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 8/286:45 pm
STL
- LAX
1 stop16h 44m
Frontier
Fri 9/411:20 pm
LAX
- STL
1 stop14h 51m
Frontier
Deal found 7/31![Frontier logo]()
$317
This Kiwi.com deal was found by Cheapflights users on 8/2. 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.
Mon 8/317:58 pm
STL
- LAX
1 stop14h 57m
Frontier
Mon 9/710:22 pm
LAX
- STL
1 stop17h 28m
Frontier
Deal found 8/2![Frontier logo]()
$326
One-way flights from St. Louis to IrvineSearch for one-way flight options from St. Louis to Irvine. Find affordable one-way fares based on user searches. Data last updated August 2, 2026.
Search for one-way flight options from St. Louis to Irvine. Find affordable one-way fares based on user searches. Data last updated August 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Sat 8/295:02 pm
STL
- LAX
2 stops41h 28m
Frontier
Deal found 8/1![Frontier logo]()
$163
This Frontier deal was found by Cheapflights users on 7/31. 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.
Thu 10/110:20 am
STL
- LAX
1 stop7h 03m
Frontier
Deal found 7/31![Frontier logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Fri 8/216:17 pm
STL
- LAX
2 stops25h 55m
Frontier
Deal found 8/1![Frontier logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/277:58 pm
STL
- LAX
2 stops15h 31m
Frontier
Deal found 7/29![Frontier logo]()
$167
This Frontier deal was found by Cheapflights users on 7/30. 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.
Thu 10/228:10 pm
STL
- LAX
1 stop5h 53m
Frontier
Deal found 7/30![Frontier logo]()
$168
This Southwest deal was found by Cheapflights users on 7/29. 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 9/216:25 am
STL
- LAX
Nonstop3h 55m
Southwest
Deal found 7/29![Southwest logo]()
$169
This Booking.com deal was found by Cheapflights users on 7/31. 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.
Thu 9/35:02 pm
STL
- LAX
1 stop27h 16m
Frontier
Deal found 7/31![Frontier logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/196:45 pm
STL
- LAX
2 stops28h 54m
Frontier
Deal found 7/29![Frontier logo]()
$172
This United Airlines deal was found by Cheapflights users on 7/30. 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 8/276:59 pm
STL
- LAX
1 stop5h 43m
United Airlines
Deal found 7/30![United Airlines logo]()
$174
This Mytrip deal was found by Cheapflights users on 7/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/88:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 7/29![Frontier logo]()
$175
This Booking.com deal was found by Cheapflights users on 7/29. 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.
Tue 8/118:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 7/29![Frontier logo]()
$176
Find flight deals from St. Louis to Irvine
Keep the following information in mind while searching for St. Louis to Irvine flight deals. Data was last updated August 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $316 (Kiwi.com) |
One-way from | $163 (Kiwi.com) |
Popular in | June |
Cheapest in | October |
Average price | $389 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis 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 August 2, 2026.
Use the filters below to find and compare flights from St. Louis to Irvine that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Thu 10/29
6:20 pm-9:50 pm
1 stop5h 30m
Los Angeles
Thu 11/5
7:00 pm-12:25 am
Nonstop3h 25m
$347
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Mon 9/14
9:05 pm-11:05 pm
Nonstop4h 00m
Los Angeles
Mon 9/28
3:25 pm-11:15 pm
1 stop5h 50m
$347
Quickest round-trip
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Thu 10/8
9:55 pm-11:55 pm
Nonstop4h 00m
Los Angeles
Sat 10/10
6:00 am-11:30 am
Nonstop3h 30m
$357
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Thu 10/8
9:55 pm-11:55 pm
Nonstop4h 00m
Los Angeles
Mon 10/12
4:30 pm-11:55 pm
1 stop5h 25m
$367
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Fri 8/28
2:32 pm-10:45 pm
2 stops10h 13m
Los Angeles
Mon 8/31
11:35 am-9:00 pm
1 stop7h 25m
$395
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Fri 9/4
6:25 am-8:20 am
Nonstop3h 55m
Los Angeles
Mon 9/7
7:10 pm-12:50 am
Nonstop3h 40m
$422
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Wed 1/13
4:10 pm-10:20 pm
2 stops8h 10m
Los Angeles
Fri 1/15
5:50 pm-11:15 pm
Nonstop3h 25m
$443
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Thu 10/8
9:55 pm-11:55 pm
Nonstop4h 00m
Los Angeles
Sun 10/11
5:10 am-10:40 am
Nonstop3h 30m
$445
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Tue 1/12
12:30 pm-4:51 pm
1 stop6h 21m
Los Angeles
Sun 1/31
11:45 pm-10:38 am
1 stop8h 53m
$448
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Tue 8/18
9:00 pm-10:55 pm
Nonstop3h 55m
Los Angeles
Sat 8/22
6:00 am-11:40 am
Nonstop3h 40m
$453
Showing 1-10 of 23 resultsSorted by cheapest first
Best time to book a flight from St. Louis to Irvine
Have a flexible travel schedule? Discover the best time to fly to Irvine from St. Louis with our price prediction graph.
STL-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 St. Louis to Irvine
STL-IR9
STL-LAX
What is the cheapest time of day to fly from STL to IR9?
Find hourly flight availability from St. Louis to Irvine. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 2, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 16% on flights from St. Louis to Irvine by exploring options for tickets in the evening.
How much does it cost to fly round-trip from St. Louis to Irvine?
Airfare is below average for this route at the moment.
St. Louis to Irvine flights typically cost between $336 and $457 in August.The cheapest round-trip price found within the last 5 days was $316 on Frontier (Aug 28-Aug 30).
What is the cheapest day to fly from St. Louis to Irvine?
Use this chart to determine the cheapest time to fly round-trip from St. Louis to Irvine. Price data was last updated on February 17, 2026.
Travelers seeking maximum savings on their St. Louis to Irvine flight should consider departing on Tuesday mornings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Irvine
Get insights into the airlines that provide service to Irvine. 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 Irvine. Reviews last updated August 2, 2026.
Read through reviews of airlines operating flights from St. Louis to Irvine, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Entertainment
7.5
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Entertainment
7.5
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Entertainment
7.5
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Entertainment
7.5
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Entertainment
7.5
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Irvine. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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
Complete your trip
Flights by cabin class
Other flight options
Other flights from St. Louis
Popular flights
Top destinations
Alternative routes for St. Louis to Irvine
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Irvine by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Irvine by cabin class
Find flights from St. Louis to Irvine, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Irvine flights
Browse other St. Louis and Irvine flight options. Last updated on August 2, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on August 2, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
St. Louis to Irvine flights
Consider these flights traveling from St. Louis to Irvine.
Top 7 airlines flying from St. Louis to Irvine
Discover the top 7 airlines that operate flights from St. Louis to Irvine. 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 August 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$139 | Average$268 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$201 | Average$454 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$228 | Average$401 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$236 | Average$351 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$292 | Average$459 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$304 | Average$384 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$385 | Average$531 | FlexibilityNo cancel fee | On-time75% |