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

Return flights

08 Oct - 01 Nov	Frontier Airlines
23 Oct - 15 Nov	Frontier Airlines
22 Oct - 15 Nov	Frontier Airlines
30 Oct - 22 Nov	TAP
02 Oct - 08 Oct	Frontier Airlines
31 Oct - 22 Nov	TAP
14 Oct - 08 Nov	TAP
07 Oct - 21 Oct	Aer Lingus
24 Oct - 03 Nov	TAP
31 Oct - 07 Nov	Aer Lingus
13 Oct - 31 Oct	Icelandair
15 Oct - 29 Oct	Turkish Airlines
24 Oct - 26 Oct	Turkish Airlines
04 Oct - 09 Oct	Turkish Airlines
11 Oct - 19 Oct	Frontier Airlines
17 Oct - 31 Oct	Turkish Airlines
10 Oct - 17 Oct	Turkish Airlines
08 Oct - 25 Oct	Turkish Airlines
01 Oct - 12 Nov	Royal Air Maroc
29 Oct - 05 Nov	Lufthansa	direct

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

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 October from 536€

Return flights