$219 Cheap Sun Country Airlines flights Los Angeles (LAX) to St. Louis (STL)

Apply the “Price (lowest to highest)” filter on Expedia to find cheap Sun Country Airlines return flights from $342 from LAX to STL. Affordable one-way tickets from $219 are also on offer.**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.

Sun Country Airlines flights to St. Louis are often cheaper in the quieter months of January and February. Whether you need a one-way or round-trip ticket, you could land a better deal then.

Start searching one to three months ahead of your travel date to get cheap fares on Sun Country Airlines flights from Los Angeles Intl. Airport (LAX) to Lambert-St. Louis Intl. Airport (STL). 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 cut costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get your timing spot on, and you can enjoy significant savings on domestic flights.*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.

To figure out if there’s a direct journey from LAX to STL with Sun Country Airlines or any other carriers, check the “Nonstop” box when browsing for flights.

Filter your results by “Early Morning” and “Morning” to find the earliest departures from LAX to STL. Taking off early means flight 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.

Lambert-St. Louis Intl. Airport (STL) is the main St. Louis hub for Sun Country Airlines flights from Los Angeles Intl. Airport (LAX).

A standard economy ticket with Sun Country Airlines from LAX to STL includes 1 cabin bag and a small personal item. Your hand luggage allowance is 1 cabin bag up to 33 lb with dimensions not exceeding 23 inches x 10 inches x 15 inches. Weight and size limits can differ based on the ticket type and cabin class. To avoid extra fees at the airport, double-check your Sun Country Airlines booking or visit the airline’s website before you start packing.

With a rewarding loyalty program and top-tier customer service, Sun Country Airlines is a popular option for many passengers heading from LAX to STL. Plus, if you’re a Sun Country Rewards and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which you can put toward future travel.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the ticket type you purchased, a fee may apply if you change or cancel your booking more than 24 hours after confirmation. To secure flexible fares, select our “Changes included” or “No cancel fee” filter while searching for flights. To learn more about canceling or modifying your reservation, head to “Trips,” select your flight and tick “Manage Booking.”