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

Return flights

27 Jul - 13 Aug	Air France
23 Jul - 13 Aug	Air France
30 Jul - 16 Aug	United
21 Jul - 22 Jul	Spirit Airlines
14 Jul - 17 Jul	Spirit Airlines
16 Jul - 23 Jul	Spirit Airlines
14 Jul - 21 Jul	Frontier Airlines
16 Jul - 09 Aug	Spirit Airlines
16 Jul - 05 Aug	Spirit Airlines
10 Jul - 17 Jul	Frontier Airlines
16 Jul - 06 Aug	Spirit Airlines
11 Jul - 18 Jul	Frontier Airlines
13 Jul - 06 Aug	Frontier Airlines
18 Jul - 07 Aug	Spirit Airlines
13 Jul - 20 Jul	Frontier Airlines
16 Jul - 08 Aug	Spirit Airlines
16 Jul - 07 Aug	Spirit Airlines
04 Jul - 12 Jul	Frontier Airlines
22 Jul - 29 Jul	United
24 Jul - 31 Jul	United

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

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 July from $781

Return flights