Cheapest return flights from St. Louis to Frankfurt in December from 725€

AirHint found the following cheapest return flights from St. Louis (STL) to Frankfurt (FRA) in December 2025 (see full year).

Return flights

03 Dec - 10 Dec Lufthansa direct
09 Dec - 16 Dec Lufthansa
01 Dec - 07 Dec Air Canada
12 Dec - 19 Dec Lufthansa direct
30 Dec - 06 Jan Lufthansa
06 Dec - 13 Dec Lufthansa
25 Dec - 01 Jan Lufthansa
08 Dec - 03 Jan Austrian Airlines
15 Dec - 22 Dec Lufthansa
21 Dec - 28 Dec Lufthansa direct
19 Dec - 03 Jan Lufthansa
20 Dec - 27 Dec Lufthansa

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

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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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