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$107+ 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 12/22. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LAX
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Irvine are usually found in September or January, booked 58 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Cheap 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 October 30, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$191
(Kiwi.com)

One-way from

$107
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$372
Provider with most accurate pricing for Lambert-St Louis-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Los Angeles flights.
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From Lambert-St Louis to Irvine
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One-way flight from Lambert-St Louis to Irvine
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Highest demand for flights based on searches. 3% potential increase in price ($14 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from St. Louis to Irvine

Cheapest flights from St. Louis to Irvine
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 October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/132:42 pmSTL - LAX
1 stop7h 11mMultiple Airlines
Fri 11/146:10 amLAX - STL
2 stops24h 57mMultiple Airlines
Deal found 10/28$195
This CheapOair deal was found by Cheapflights users on 10/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/87:43 pmSTL - LAX
1 stop24h 55mFrontier
Thu 1/83:20 pmLAX - STL
1 stop27h 32mFrontier
Deal found 10/29$196
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:48 amSTL - LAX
1 stop25h 22mFrontier
Sat 1/311:08 amLAX - STL
2 stops54h 59mFrontier
Deal found 10/28$197
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Fri 11/149:07 pmSTL - LAX
1 stop13h 07mMultiple Airlines
Sun 11/168:40 pmLAX - STL
1 stop15h 17mMultiple Airlines
Deal found 10/29$198
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:45 pmSTL - LAX
1 stop6h 40mFrontier
Sat 11/152:48 pmLAX - STL
1 stop16h 19mFrontier
Deal found 10/28$200
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/127:45 pmSTL - LAX
2 stops14h 29mMultiple Airlines
Sun 11/168:40 pmLAX - STL
1 stop15h 17mMultiple Airlines
Deal found 10/29$201
This Frontier deal was found by Cheapflights users on 10/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/132:42 pmSTL - LAX
1 stop7h 11mFrontier
Fri 11/149:22 pmLAX - STL
1 stop9h 45mFrontier
Deal found 10/28$202
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Fri 12/197:43 pmSTL - LAX
2 stops13h 35mMultiple Airlines
Mon 12/299:15 amLAX - STL
1 stop8h 52mMultiple Airlines
Deal found 10/29$203
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Mon 12/810:47 amSTL - LAX
2 stops12h 24mFrontier
Sat 1/173:33 pmLAX - STL
1 stop18h 42mFrontier
Deal found 10/30$205
This CheapOair deal was found by Cheapflights users on 10/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/277:57 pmSTL - LAX
1 stop6h 12mFrontier
Thu 12/43:30 pmLAX - STL
1 stop28h 18mFrontier
Deal found 10/30$206
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Mon 11/247:04 pmSTL - LAX
2 stops26h 43mFrontier
Tue 12/27:00 amLAX - STL
1 stop25h 14mFrontier
Deal found 10/29$207
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Mon 11/172:42 pmSTL - LAX
1 stop7h 11mFrontier
Thu 11/205:33 pmLAX - STL
2 stops28h 24mFrontier
Deal found 10/30$208

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 October 30, 2025.
Use the filters below to find and compare flights from St. Louis to Irvine that are best for you.

Fly from

St. Louis

Fly to

Irvine

Route

Depart

Return

Price

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 12/9

12:49 pm-8:43 pm

2 stops9h 54m

Los Angeles

Tue 12/16

11:40 am-1:01 am

2 stops11h 21m

$314

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sat 12/6

6:30 am-4:54 pm

2 stops12h 24m

Los Angeles

Wed 12/10

11:40 am-1:01 am

2 stops11h 21m

$314

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sat 12/6

1:00 pm-11:13 pm

2 stops12h 13m

Los Angeles

Thu 12/11

7:40 am-7:10 pm

2 stops9h 30m

$324

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sat 1/24

7:00 am-4:38 pm

2 stops11h 38m

Los Angeles

Mon 1/26

9:55 am-9:38 pm

2 stops9h 43m

$324

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Wed 12/17

6:35 pm-8:40 pm

Nonstop4h 05m

Los Angeles

Fri 12/26

5:10 am-10:50 am

Nonstop3h 40m

$325

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Thu 12/11

1:35 pm-5:25 pm

1 stop5h 50m

Los Angeles

Fri 12/12

12:55 am-10:04 am

1 stop7h 09m

$325

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Thu 1/22

10:25 am-12:45 pm

Nonstop4h 20m

Los Angeles

Sun 1/25

5:50 am-11:30 am

Nonstop3h 40m

$325

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Thu 1/8

10:42 am-9:11 am

1 stop24h 29m

$133

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Wed 1/28

10:25 am-12:45 pm

Nonstop4h 20m

$148

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Wed 1/14

10:25 am-12:45 pm

Nonstop4h 20m

$148

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 17 results
1
2

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.
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

How far ahead should I book a flight from St. Louis to Irvine?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Irvine. Price data was last updated on October 24, 2025.

To ensure you get the cheapest price possible for a flight from St. Louis to Irvine, you should look to book at least 58 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from St. Louis to Irvine?

Currently, November is the cheapest month in which you can book a flight from St. Louis to Irvine (average of $67). Flying from St. Louis to Irvine in June is currently the most expensive (average of $248). 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 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 October 30, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 46% on flights from St. Louis to Irvine by exploring options for tickets in the evening.

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 October 26, 2025.

Travelers seeking maximum savings on their St. Louis to Irvine flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday 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 October 30, 2025.
Read through reviews of airlines operating flights from St. Louis to Irvine, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,243 reviews

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,243 reviews
Southwest
8.0
Very good
4,243 reviews

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
7.9
Good
7,998 reviews
Southwest
8.0
Very good
4,243 reviews

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,998 reviews
Southwest
8.0
Very good
4,243 reviews

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
11,035 reviews
Southwest
8.0
Very good
4,243 reviews

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,122 reviews
Southwest
8.0
Very good
4,243 reviews

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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.

  • What airport do you fly from for flights from St. Louis to Irvine?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Irvine. On average, Lambert-St Louis has 3 outbound flights to Irvine per day from 7 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • How popular is this St. Louis to Irvine flight route?

    The Lambert-St Louis to Irvine flight path was viewed by 16 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from St. Louis to Irvine?

    Delta can get you from St. Louis to Irvine in just under 9h 54m. Your travel time can differ by up to . There are 1588 mi between St. Louis and Irvine.

  • What are the most reliable airlines from St. Louis to Irvine?

    The top 3 most reliable airlines when flying from St. Louis to Irvine are Cathay Pacific (79%), Qantas Airways (77%) and Japan Airlines (77%).

  • What are the cheapest flights from St. Louis to Irvine?

    Looking at all options, your cheapest flight can be booked for $147. While the most popular route (Lambert-St Louis - Los Angeles) can be booked for $130 on average, our data indicates $1,288 when flying from St. Louis to Irvine.

  • Can I find deals for flights from St. Louis to Irvine that include hotel bookings?

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

  • How can I find direct flights from St. Louis to Irvine?

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

  • Can I find deals for business class flights from St. Louis to Irvine?

    Yes. Cheapflights offers flight deals from St. Louis 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 St. Louis to Irvine?

    Currently, November is the cheapest month in which you can book a flight from St. Louis to Irvine (average of $67). Flying from St. Louis to Irvine in June is currently the most expensive (average of $248). 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 St. Louis to Irvine

See prices for flight routes from nearby airports that may be better suited for you.
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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$94Average$224FlexibilityNo cancel feeOn-time62%
DeltaCheapest$171Average$364FlexibilityNo cancel feeOn-timeN/A
Spirit AirlinesCheapest$172Average$173FlexibilityNo cancel feeOn-time65%
SouthwestCheapest$259Average$431FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$264Average$406FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$292Average$434FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$296Average$547FlexibilityNo cancel feeOn-time75%

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