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

Return flights

09 Jun - 19 Jun	Condor
03 Jun - 07 Jul	Condor
02 Jun - 02 Jul	Frontier Airlines
08 Jun - 22 Jun	Condor
02 Jun - 03 Jul	Condor
01 Jun - 16 Jun	Alaska Airlines
01 Jun - 02 Jul	Alaska Airlines
05 Jun - 09 Jul	Condor
09 Jun - 19 Jun	Lufthansa	direct
10 Jun - 17 Jun	Lufthansa	direct
30 Jun - 07 Jul	Lufthansa	direct
03 Jun - 07 Jul	Lufthansa	direct
02 Jun - 03 Jul	Lufthansa	direct
01 Jun - 16 Jun	Lufthansa	direct
08 Jun - 22 Jun	Lufthansa	direct
05 Jun - 12 Jun	Lufthansa	direct
15 Jun - 22 Jun	Lufthansa	direct
25 Jun - 02 Jul	Lufthansa
20 Jun - 27 Jun	Lufthansa

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

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from St. Louis to Frankfurt in June from $945

Return flights