$94 Cheap Frontier Airlines flights St. Louis (STL) to Los Angeles (LAX)

You’ll find affordable return Frontier Airlines flights from $217 from STL to LAX by organizing your results from “Price (lowest to highest)” on Expedia. Or search for deals from $94 for a one-way trip.**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.

January is one of the least expensive months to get away to Los Angeles with Frontier Airlines. You could also find fantastic deals on one-way and round-trip fares in February.

Look for cheap Frontier Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Los Angeles Intl. Airport (LAX) one to three months ahead of your departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare type and itinerary, the best day of the week to book a domestic flight is usually Sunday and the most expensive day is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**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 see if there’s a direct route from STL to LAX with Frontier Airlines or another airline, check the “Nonstop” box when searching for flights.

Sort your results by “Early Morning” and “Morning” to find the earliest flights from STL to LAX. Leaving 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.

Frontier Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Los Angeles touch down at Los Angeles Intl. Airport (LAX). This is the main entry point to this city.

Offering a rewarding loyalty program, Frontier Airlines is a popular choice for many passengers journeying from STL to LAX. Plus, if you’re a Frontier Miles and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on your ticket type, a fee will generally apply if you cancel or reschedule your flight more than 24 hours after confirmation. To find flexible fares, select our “Changes included” and “No cancel fee” boxes when looking for flights. For additional information on canceling or changing your reservation, visit “Trips,” select your flight and tick “Manage Booking.”