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

Return flights

31 Oct - 07 Nov	Icelandair
14 Oct - 23 Oct	Icelandair
20 Oct - 29 Oct	Icelandair
06 Oct - 01 Nov	Icelandair
10 Oct - 20 Oct	Icelandair
07 Oct - 14 Oct	Icelandair
03 Oct - 25 Oct	Icelandair
10 Oct - 26 Oct	Icelandair
25 Oct - 01 Nov	Icelandair
27 Oct - 05 Nov	Icelandair
28 Oct - 01 Nov	Icelandair
14 Oct - 26 Oct	Icelandair
02 Oct - 06 Oct	Icelandair
03 Oct - 08 Oct	Icelandair
01 Oct - 06 Oct	Icelandair
31 Oct - 02 Nov	Icelandair
25 Oct - 15 Nov	Scandinavian Airlines
29 Oct - 02 Nov	Icelandair
27 Oct - 05 Nov	Scandinavian Airlines	direct
27 Oct - 03 Nov	Scandinavian Airlines	direct

Also check the deals for one-way flights from Washington to Copenhagen 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 Copenhagen in October from $421

Return flights