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St. Louis

$70+ Cheap flights from California to St. Louis (STL)

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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — STL
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Cheap flight deals from California to St. Louis

Keep the following information in mind while searching for California to St. Louis flight deals. Data was last updated August 20, 2025.

Round-trip from

$120
(Cheapflightsfares)

One-way from

$70
(Trip.com)

Popular in

December

Cheapest in

August

Average price

$345

Good round-trip deal

$296 or less

Good one-way deal

$166 or less
From California to Lambert-St Louis
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One-way flight from California to Lambert-St Louis
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Highest demand for flights based on searches. 6% potential increase in price ($29 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from California to Lambert-St Louis.
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Price to beat on a one-way flight from California to Lambert-St Louis.
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Find flight deals from California to St. Louis

Cheapest flights from California to St. Louis
Explore the most affordable flight options available from California to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2025.

This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/246:20 amLAS - STL
Nonstop3h 23mFrontier
Sun 10/267:52 pmSTL - LAS
1 stop5h 40mFrontier
Deal found 8/18$120
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/173:38 pmLAS - STL
Nonstop3h 26mFrontier
Mon 10/207:52 pmSTL - LAS
1 stop5h 40mFrontier
Deal found 8/18$122
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/58:34 amLAS - STL
Nonstop3h 19mFrontier
Mon 9/82:38 pmSTL - LAS
Nonstop3h 38mFrontier
Deal found 8/18$128
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/312:59 amLAS - STL
1 stop6h 07mFrontier
Sun 9/72:38 pmSTL - LAS
Nonstop3h 38mFrontier
Deal found 8/19$129
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/25:14 pmLAS - STL
1 stop13h 52mFrontier
Sun 10/52:38 pmSTL - LAS
Nonstop3h 38mFrontier
Deal found 8/19$132
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/173:38 pmLAS - STL
Nonstop3h 26mFrontier
Sun 10/1911:32 amSTL - LAS
1 stop12h 16mFrontier
Deal found 8/18$133
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 8/318:24 amLAS - STL
Nonstop3h 22mFrontier
Sun 8/316:47 pmSTL - LAS
Nonstop3h 35mFrontier
Deal found 8/17$135
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3112:36 pmLAS - STL
Nonstop3h 26mFrontier
Wed 9/37:54 pmSTL - LAS
1 stop5h 40mFrontier
Deal found 8/17$140
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/212:59 amONT - STL
1 stop6h 12mFrontier
Sun 9/77:55 pmSTL - ONT
1 stop25h 59mFrontier
Deal found 8/18$142
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 9/212:59 amLAS - STL
1 stop6h 12mFrontier
Tue 9/97:55 pmSTL - LAS
1 stop5h 38mFrontier
Deal found 8/18$142
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/212:59 amONT - STL
1 stop6h 12mFrontier
Mon 9/87:55 pmSTL - ONT
1 stop25h 59mFrontier
Deal found 8/18$143
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1512:59 amLAS - STL
1 stop6h 07mFrontier
Tue 9/237:55 pmSTL - LAS
1 stop5h 38mFrontier
Deal found 8/20$143

Cheapflights Fare Finder

 
Customize your flight search to find flights from California to St. Louis 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 20, 2025.
Use the filters below to find and compare flights from California to St. Louis that are best for you.

Fly from

California

Fly to

St. Louis

Route

Depart

Return

Price

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 9/4

12:59 am-9:06 am

1 stop6h 07m

Lambert-St Louis

Mon 9/8

2:38 pm-4:16 pm

Nonstop3h 38m

$120

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Wed 10/1

12:59 am-9:06 am

1 stop6h 07m

Lambert-St Louis

Sun 10/5

2:38 pm-4:16 pm

Nonstop3h 38m

$120

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 10/24

6:20 am-11:43 am

Nonstop3h 23m

Lambert-St Louis

Sun 10/26

7:52 pm-11:32 pm

1 stop5h 40m

$120

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 9/26

3:15 pm-8:40 pm

Nonstop3h 25m

Lambert-St Louis

Sun 9/28

7:55 pm-11:33 pm

1 stop5h 38m

$120

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 10/17

6:20 am-11:43 am

Nonstop3h 23m

Lambert-St Louis

Tue 10/21

7:52 pm-11:32 pm

1 stop5h 40m

$122

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Tue 9/30

12:59 am-9:06 am

1 stop6h 07m

Lambert-St Louis

Sun 10/5

2:38 pm-4:16 pm

Nonstop3h 38m

$122

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Mon 10/13

12:59 am-9:07 am

1 stop6h 08m

Lambert-St Louis

Mon 10/20

12:38 pm-2:19 pm

Nonstop3h 41m

$122

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 10/16

12:59 am-9:07 am

1 stop6h 08m

Lambert-St Louis

Sat 10/25

4:51 pm-6:30 pm

Nonstop3h 39m

$122

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Sat 10/18

12:59 am-9:07 am

1 stop6h 08m

Lambert-St Louis

Mon 10/20

9:59 pm-11:37 pm

Nonstop3h 38m

$122

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Tue 10/14

12:59 am-9:07 am

1 stop6h 08m

Lambert-St Louis

Mon 10/20

9:59 pm-11:37 pm

Nonstop3h 38m

$122

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/19

Showing 1-10 of 60 results
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Best time to book a flight from California to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from California 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 California to St. Louis

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

Currently, August is the cheapest month in which you can book a flight from California to St. Louis (average of $311). Flying from California to St. Louis in March is currently the most expensive (average of $356). 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 CA to STL?

Find hourly flight availability from California to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 20, 2025.

When flying from California to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from California to St. Louis

Explore weekly flight availability from California to St. Louis. 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 August 20, 2025.

The most flights from USCA to STL are scheduled on a Monday (10 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (8 on average).

Related info for your journey

Find useful and relevant information for your journey from California to St. Louis. 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 into for flights to St. Louis from California?

    Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly into when you book flights from California to St. Louis.

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

    The California to Lambert-St Louis flight path was viewed by 17 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 California to St. Louis?

    Airlines like Frontier fly from California to St. Louis in about 6h 07m. The time it takes to get you to your destination can typically vary by up to . The distance from California to St. Louis is about 1367 mi.

  • What are the cheapest airlines to fly from California to St. Louis one-way?

    The cheapest airlines for a one-way flight from California to St. Louis are Frontier ($70), Hawaiian Airlines ($158), and Alaska Airlines ($158).

  • What are the most popular routes from California to St. Louis?

    The most popular route from California to St. Louis is San Francisco - Lambert-St Louis. You may also consider Los Angeles - Lambert-St Louis or San Jose - Lambert-St Louis.

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

    The top 3 most reliable airlines when flying from California to St. Louis are Southwest (83%), SkyWest Airlines (75%) and American Airlines (75%).

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

    Looking for the cheapest flight from California to St. Louis? While on average our users pay $300, our data indicates the cheapest price to be $100. The most popular route (San Francisco - Lambert-St Louis), is priced around $225.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from California to St. Louis (average of $311). Flying from California to St. Louis in March is currently the most expensive (average of $356). 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Chesterfield
Farmington
Festus

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Alternative routes for California to St. Louis

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Top 6 airlines flying from California to St. Louis

Discover the top 6 airlines that operate flights from California to St. Louis. 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 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$108Average$249FlexibilityNo cancel feeOn-time62%
DeltaCheapest$184Average$371FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$202Average$395FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$246Average$455FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$280Average$457FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$315Average$645FlexibilityNo cancel feeOn-time75%

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