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

Return flights

01 Dec - 09 Dec	TAP
12 Dec - 10 Jan	Frontier Airlines
04 Dec - 07 Dec	TAP
11 Dec - 14 Dec	TAP
05 Dec - 15 Dec	TAP
04 Dec - 18 Dec	Turkish Airlines
01 Dec - 15 Dec	TAP
10 Dec - 30 Jan	Scandinavian Airlines
29 Dec - 24 Jan	Icelandair
06 Dec - 13 Dec	TAP
24 Dec - 17 Jan	Icelandair
08 Dec - 22 Dec	Turkish Airlines
31 Dec - 07 Jan	Lufthansa
10 Dec - 15 Jan	Icelandair
05 Dec - 12 Dec	Lufthansa	direct
15 Dec - 10 Jan	Frontier Airlines
28 Dec - 17 Jan	TAP
03 Dec - 27 Dec	Turkish Airlines
30 Dec - 06 Jan	Turkish Airlines
15 Dec - 13 Jan	Icelandair

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

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 Washington to Frankfurt in December from $602

Return flights