Cheapest return flights from St. Louis to Frankfurt in December from 785€

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

Return flights

24 Dec - 17 Jan Frontier Airlines
02 Dec - 07 Dec Aer Lingus
30 Dec - 06 Jan Lufthansa
08 Dec - 17 Dec Frontier Airlines
12 Dec - 25 Dec KLM
07 Dec - 27 Dec Spirit Airlines
19 Dec - 10 Jan Frontier Airlines
16 Dec - 23 Dec Lufthansa
10 Dec - 17 Dec Lufthansa direct
14 Dec - 21 Dec Lufthansa direct
08 Dec - 15 Dec Lufthansa
06 Dec - 13 Dec Lufthansa
24 Dec - 31 Dec Lufthansa direct
20 Dec - 04 Jan Frontier Airlines
26 Dec - 02 Jan Lufthansa
28 Dec - 04 Jan Lufthansa direct

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

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