$298 Cheap American Airlines flights St. Louis (STL) to St. Thomas (STT)

You’ll discover budget-friendly return American Airlines flights from $476 from STL to STT by sorting your results from “Price (lowest to highest)” on Expedia. Or search for bargains from $298 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.

Browse for round-trip or one-way flights to St. Thomas in September or October. You could find an affordable fare with American Airlines during these off-peak times.

Getting the best American Airlines deals from STL to STT is typically all about timing. You can save 17% on international flights when you book 18 to 29 days before takeoff instead of four to five months ahead. Better still, you can pocket 17% on average by buying your tickets on a Sunday compared to a Friday, which is usually the most expensive day to book.* It’s a good idea to start searching for flights about one month before you plan to travel.*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.

Click on the “Nonstop” filter when looking for direct American Airlines flights from STL to STT. You can also compare other airlines servicing the same nonstop route.

Find American Airlines’s earliest flights from STL to STT by checking our “Morning” and “Early Morning” filters. Not only will you get to 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 Lambert-St. Louis Intl. Airport (STL) to St. Thomas land at Cyril E. King Airport (STT). This is the main gateway here.

It’s usually possible to cancel or modify your flight, although additional fees may apply if you made your booking more than 24 hours ago. Need flexible options? Use our “Changes included” and “No cancel fee” filters to find flights that won’t charge you extra if you have to revise your plans. To modify your booking, head to “Trips,” select your flight and click on “Manage Booking” for further information.