Cheapest return flights from St. Louis (STL) to Frankfurt (FRA), September

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
01 Sep 15 Sep Condor
07 Sep 25 Sep Frontier Airlines
16 Sep 29 Sep Frontier Airlines
12 Sep 26 Sep Frontier Airlines
13 Sep 28 Sep Frontier Airlines
16 Sep 30 Sep Frontier Airlines
25 Sep 16 Oct Frontier Airlines
13 Sep 27 Sep Frontier Airlines
11 Sep 26 Sep Frontier Airlines
17 Sep 30 Sep Frontier Airlines
15 Sep 29 Sep Frontier Airlines
15 Sep 30 Oct Frontier Airlines
25 Sep 16 Oct Lufthansa
Direct Flight
16 Sep 31 Oct British Airways
20 Sep 05 Oct Finnair
18 Sep 03 Oct Frontier Airlines
20 Sep 05 Oct Lufthansa
Direct Flight
Powered by

deals for one-way flights from St. Louis to Frankfurt in September.

Book a cheap hotel in Frankfurt

Cheap car rent in Frankfurt Main

Updated Jul 14, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

Feel free to contact us with any feedback or request another flight research.