Cheapest return flights from Washington to Keflavik in October from $370

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

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

Return flights

22 Oct - 31 Oct Icelandair direct
15 Oct - 20 Oct Icelandair direct
01 Oct - 05 Oct Icelandair direct
09 Oct - 14 Oct Icelandair direct
10 Oct - 14 Oct Icelandair direct
04 Oct - 11 Oct Icelandair direct
10 Oct - 17 Oct Icelandair direct
20 Oct - 25 Oct Icelandair direct
28 Oct - 07 Nov British Airways
30 Oct - 07 Nov British Airways

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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