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$95+ 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 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LAX
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
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 September 16, 2025.

Round-trip from

$176
(Booking.com)

One-way from

$95
(Booking.com)

Popular in

March

Cheapest in

September

Average price

$311
From Lambert-St Louis to Irvine
Search Deals
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 ($16 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 September 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 September 16, 2025.

This Booking.com deal was found by Cheapflights users on 9/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1610:17 amSTL - LAX
1 stop28h 06mFrontier
Mon 10/209:17 pmLAX - STL
1 stop9h 50mFrontier
Deal found 9/16$176
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Thu 11/137:45 pmSTL - LAX
1 stop6h 40mFrontier
Tue 11/182:48 pmLAX - STL
1 stop16h 19mFrontier
Deal found 9/16$180
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/318:40 pmSTL - LAX
1 stop5h 45mFrontier
Mon 11/311:56 amLAX - STL
1 stop6h 16mFrontier
Deal found 9/14$182
This Frontier deal was found by Cheapflights users on 9/15. 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 9/254:00 pmSTL - LAX
1 stop7h 45mFrontier
Sun 9/2810:45 pmLAX - STL
1 stop14h 19mFrontier
Deal found 9/15$183
This Booking.com deal was found by Cheapflights users on 9/15. 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.
Sat 10/47:55 pmSTL - LAX
1 stop23h 23mFrontier
Tue 10/71:15 pmLAX - STL
1 stop17h 52mFrontier
Deal found 9/15$184
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/37:55 pmSTL - LAX
1 stop6h 32mFrontier
Tue 10/73:48 pmLAX - STL
2 stops15h 19mFrontier
Deal found 9/14$189
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/37:55 pmSTL - LAX
1 stop6h 32mMultiple Airlines
Sat 10/47:50 pmLAX - STL
2 stops11h 16mMultiple Airlines
Deal found 9/14$190
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/17:55 pmSTL - LAX
1 stop6h 32mFrontier
Tue 10/73:48 pmLAX - STL
2 stops15h 19mFrontier
Deal found 9/14$191
This Frontier deal was found by Cheapflights users on 9/14. 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 10/37:55 pmSTL - LAX
2 stops13h 36mFrontier
Mon 10/69:03 pmLAX - STL
1 stop10h 04mFrontier
Deal found 9/14$192
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 9/292:38 pmSTL - LAX
1 stop7h 14mMultiple Airlines
Sat 10/412:53 amLAX - STL
1 stop7h 01mMultiple Airlines
Deal found 9/14$195
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/237:52 pmSTL - LAX
1 stop6h 33mMultiple Airlines
Sat 10/2512:53 amLAX - STL
1 stop6h 29mMultiple Airlines
Deal found 9/14$196
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/51:57 pmSTL - LAX
1 stop20h 15mFrontier
Tue 10/73:48 pmLAX - STL
2 stops15h 19mFrontier
Deal found 9/14$197

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 September 16, 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

10:15 am-12:25 pm

Nonstop4h 10m

Los Angeles

Tue 12/16

7:35 am-1:10 pm

Nonstop3h 35m

$295

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 11/11

6:35 pm-8:40 pm

Nonstop4h 05m

Los Angeles

Wed 11/26

5:10 am-10:50 am

Nonstop3h 40m

$295

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 12/16

6:35 pm-8:40 pm

Nonstop4h 05m

Los Angeles

Tue 12/30

5:10 am-10:50 am

Nonstop3h 40m

$295

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Fri 10/24

9:25 pm-11:25 pm

Nonstop4h 00m

Los Angeles

Sat 10/25

2:25 pm-8:05 pm

Nonstop3h 40m

$304

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sat 11/1

3:35 pm-10:20 pm

1 stop8h 45m

Los Angeles

Thu 11/6

6:35 pm-12:05 am

Nonstop3h 30m

$305

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Thu 1/29

10:25 am-12:45 pm

Nonstop4h 20m

Los Angeles

Sun 2/1

11:25 am-5:00 pm

Nonstop3h 35m

$310

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Wed 11/26

6:00 am-8:10 am

Nonstop4h 10m

Los Angeles

Mon 12/1

5:10 am-10:50 am

Nonstop3h 40m

$310

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Mon 2/9

7:45 pm-10:00 pm

Nonstop4h 15m

$148

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Mon 10/20

9:25 pm-11:25 pm

Nonstop4h 00m

$148

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Mon 10/13

9:25 pm-11:25 pm

Nonstop4h 00m

$148

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 14 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 September 12, 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, January is the cheapest month in which you can book a flight from St. Louis to Irvine (average of $246). Flying from St. Louis to Irvine in March is currently the most expensive (average of $325). 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 September 16, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Irvine as you normally would.

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 September 14, 2025.

Travelers seeking maximum savings on their St. Louis to Irvine flight should consider departing on Saturday at noon when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from St. Louis to Irvine

Explore weekly flight availability from St. Louis to Irvine. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 16, 2025.

The most flights from STL to IR9 are scheduled on a Monday (10 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (2 on average).

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 September 16, 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
4,242 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

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
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

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
8.0
Very good
7,957 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

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
8,924 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

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
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

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
3,174 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

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 6 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 15 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?

    Southwest can get you from St. Louis to Irvine in just under 4h 10m. Your travel time will be generally consistent. There are 1588 mi between St. Louis and Irvine. Generally, flights for this route are nonstop.

  • 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 Alaska Airlines (95%), Japan Airlines (90%) and Air Tahiti Nui (90%).

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

    Looking at all options, your cheapest flight can be booked for $143. While the most popular route (Lambert-St Louis - Los Angeles) can be booked for $175 on average, our data indicates $704 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, January is the cheapest month in which you can book a flight from St. Louis to Irvine (average of $246). Flying from St. Louis to Irvine in March is currently the most expensive (average of $325). 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$95Average$227FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$172Average$173FlexibilityNo cancel feeOn-time65%
DeltaCheapest$181Average$390FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$264Average$411FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$273Average$437FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$296Average$547FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$296Average$434FlexibilityNo cancel feeOn-time69%

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