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

Return flights

05 Dec - 15 Dec	TAP
01 Dec - 10 Dec	TAP
08 Dec - 13 Dec	TAP
04 Dec - 13 Dec	TAP
01 Dec - 07 Dec	TAP
01 Dec - 05 Dec	Icelandair
15 Dec - 29 Dec	TAP
04 Dec - 22 Dec	Turkish Airlines
04 Dec - 21 Dec	TAP
03 Dec - 27 Dec	Turkish Airlines
24 Dec - 17 Jan	Icelandair
24 Dec - 10 Jan	Icelandair
29 Dec - 09 Jan	Lufthansa	direct
04 Dec - 04 Jan	Scandinavian Airlines
23 Dec - 08 Jan	Air Canada
24 Dec - 07 Jan	Scandinavian Airlines
23 Dec - 10 Jan	SWISS
24 Dec - 17 Jan	United	direct
05 Dec - 04 Jan	Frontier Airlines
23 Dec - 10 Jan	United	direct

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.

Book a cheap hotel in Frankfurt

Cheap car rent in Frankfurt

Cheapest return flights from Washington to Frankfurt in December from $439

Return flights