Cheapest return flights from St. Louis to Frankfurt in September from 1,040€

AirHint found the following cheapest return flights from St. Louis (STL) to Frankfurt (FRA) in September 2026 (see full year).

Return flights

02 Sep - 30 Sep Aer Lingus
21 Sep - 29 Sep Lufthansa direct
01 Sep - 08 Sep Lufthansa direct
16 Sep - 23 Sep Lufthansa direct
02 Sep - 30 Sep Lufthansa direct
06 Sep - 13 Sep Lufthansa direct
11 Sep - 18 Sep Lufthansa direct
26 Sep - 03 Oct Lufthansa

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

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