Cheapest return flights from Washington to Keflavik in October from $398

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

Return flights

13 Oct - 08 Nov Icelandair direct
15 Oct - 22 Oct Icelandair direct
19 Oct - 23 Oct Icelandair direct
12 Oct - 01 Nov Icelandair direct
12 Oct - 16 Oct Icelandair direct
05 Oct - 10 Oct Icelandair direct
11 Oct - 16 Oct Icelandair direct
06 Oct - 01 Nov Icelandair direct
14 Oct - 21 Oct Icelandair direct
13 Oct - 21 Oct Icelandair direct
05 Oct - 11 Oct Icelandair direct
20 Oct - 23 Oct Scandinavian Airlines
04 Oct - 09 Oct Icelandair direct
31 Oct - 07 Nov Icelandair direct
30 Oct - 03 Nov Icelandair direct
30 Oct - 06 Nov Icelandair direct
30 Oct - 02 Nov Icelandair direct
20 Oct - 15 Nov Icelandair direct
31 Oct - 04 Nov Icelandair direct
09 Oct - 06 Nov Austrian Airlines

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

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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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