Cheapest return flights from Washington to Keflavik in October from $517

Best time to book flights for Washington (DCA) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from Washington (DCA) to Keflavik (KEF) in October 2025 (see full year).

Return flights

07 Oct - 14 Oct Air France
09 Oct - 16 Oct Air France
05 Oct - 12 Oct Air France
06 Oct - 13 Oct KLM
08 Oct - 15 Oct jetBlue
20 Oct - 27 Oct Scandinavian Airlines
23 Oct - 26 Oct Icelandair
16 Oct - 21 Oct Icelandair
09 Oct - 14 Oct Icelandair
31 Oct - 04 Nov Icelandair
08 Oct - 14 Oct Icelandair

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

Skyscanner

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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