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

Return flights

06 May - 13 May	British Airways
26 May - 16 Jun	British Airways
27 May - 17 Jun	British Airways
06 May - 13 May	Lufthansa	direct
23 May - 03 Jun	Alaska Airlines
24 May - 10 Jun	Alaska Airlines
17 May - 24 May	Lufthansa	direct
27 May - 14 Jun	Aer Lingus
02 May - 09 May	Lufthansa
07 May - 14 May	Lufthansa
24 May - 10 Jun	Lufthansa	direct
27 May - 17 Jun	Lufthansa	direct
27 May - 03 Jun	Lufthansa	direct
27 May - 14 Jun	Lufthansa	direct

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

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 May from $857

Return flights