$159 Cheap United flights St. Louis (STL) to Los Angeles (LAX)

View $159 flight on Wed, Sep 24, 2025Opens in a new window

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$159 Cheap United flights St. Louis (STL) to Los Angeles (LAX)

Prices were available within the past 7 days and start at $159 for one-way flights and $254 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Sep 2 - Wed, Sep 3
STL
St. Louis
LAX
Los Angeles
$254 Roundtrip, found 4 hours ago
$254
Roundtrip
found 4 hours ago
Select United flight, departing Tue, Sep 2 from St. Louis to Los Angeles, returning Wed, Sep 3, priced at $254 found 4 hours ago
United
Thu, Aug 21 - Sun, Aug 24
STL
St. Louis
LAX
Los Angeles
$263 Roundtrip, just found
$263
Roundtrip
just found
Select United flight, departing Thu, Aug 21 from St. Louis to Los Angeles, returning Sun, Aug 24, priced at $263 just found
United
Wed, Aug 20 - Sat, Aug 23
STL
St. Louis
LAX
Los Angeles
$264 Roundtrip, just found
$264
Roundtrip
just found
Select United flight, departing Wed, Aug 20 from St. Louis to Los Angeles, returning Sat, Aug 23, priced at $264 just found
United
Wed, Oct 1 - Tue, Oct 7
STL
St. Louis
LAX
Los Angeles
$310 Roundtrip, found 3 days ago
$310
Roundtrip
found 3 days ago
Select United flight, departing Wed, Oct 1 from St. Louis to Los Angeles, returning Tue, Oct 7, priced at $310 found 3 days ago
Flights from St. Louis (STL) to Los Angeles (LAX)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Los Angeles Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, Spirit Airlines, Sun Country Airlines, United
Popular airline
Alaska Airlines
Distance
1588 mi
Average flight time
3 hours 28 mins

Frequently asked questions

How much is a United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Los Angeles Intl. Airport (LAX)?
You'll find affordable round-trip United Airlines flights from $254 from STL to LAX by filtering your results from "Price (lowest to highest)" on Expedia. Or look for options from $159 for a one-way journey.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from STL to LAX with United Airlines?
United Airlines flights to Los Angeles are often more affordable in the off-peak months of January and February. Whether you're searching for a return or one-way ticket, you could find a better deal then.
What is the cheapest time to book flights from Lambert-St. Louis Intl. Airport (STL) to Los Angeles Intl. Airport (LAX) with United Airlines?
Begin your search one to three months before your departure to get cheap fares on United Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Los Angeles Intl. Airport (LAX). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Time it well, and you can enjoy significant savings on domestic journeys.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Lambert-St. Louis Intl. Airport (STL) to Los Angeles Intl. Airport (LAX)?
Select our "Nonstop" filter when looking for direct United Airlines flights from STL to LAX. It's also a good way to compare other airlines offering the same nonstop journey.
What is the earliest United Airlines flight from STL to LAX?
To find the earliest departures from STL to LAX with United Airlines, sort your results by "Early Morning" and "Morning." Booking an early flight generally means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Los Angeles?
Los Angeles Intl. Airport (LAX) is the main Los Angeles gateway for United Airlines flights from Lambert-St. Louis Intl. Airport (STL).
Why fly with United Airlines from STL to LAX?
A rewarding loyalty program and the ability to rack up points through United Mileage Plus are the start of the reasons to leave from STL to LAX with United Airlines. Plus, when you join Expedia's free One Key™ program, you can earn OneKeyCash™* alongside United Airlines's loyalty program earnings. It's yours to spend on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Los Angeles Intl. Airport (LAX)?
Changes are generally free within 24 hours of making your booking, but your airline may charge a fee after that. For more information about modifying your reservation, head to your "Trips," select your flight and click on "Manage Booking." If you want the freedom to change your plans without additional charges, check the "No cancel fee" or "Changes included" filter when planning your next escape.

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