$149 Cheap American Airlines flights Mosinee (CWA) to St. Louis (STL)

You can discover cheap round-trip American Airlines flights from $314 from CWA to STL by sorting your results from “Price (lowest to highest)” on Expedia. Or search for options from $149 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.

American Airlines flights to St. Louis are typically more affordable in the low-season months of January and February. Whether you’re in search of a return or one-way ticket, you could land a better deal then.

Search for affordable American Airlines flights from Central Wisconsin Airport (CWA) to Lambert-St. Louis Intl. Airport (STL) one to three months ahead of your departure day. 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. No matter the fare class and journey, the best day of the week to book a domestic flight is generally Sunday and the most expensive tends to be 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 figure out if there’s a direct journey from CWA to STL with American Airlines or other airlines, use our “Nonstop” filter when looking for flights.

Browse American Airlines’s earliest flights from CWA to STL by checking our “Morning” and “Early Morning” filters. Not only will you arrive at your destination sooner, early departures also have a 20% less chance of being canceled.**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.

American Airlines flights from Central Wisconsin Airport (CWA) to St. Louis land at Lambert-St. Louis Intl. Airport (STL). This is the main entry point here.

Changes are generally free within 24 hours of making your booking, but your airline may add a charge after that time. For more details about altering your reservation, go to your “Trips,” select your flight and click on “Manage Booking.” If you want the flexibility to change your plans without extra charges, check the “No cancel fee” or “Changes included” filter when planning your next getaway.