Cheapest one-way flights from Washington to Keflavik in July from $306

AirHint found the following cheapest one-way flights from Washington (IAD) to Keflavik (KEF) in July 2025 (see full year).

One-Way flights

20 Jul Allegiant Air
24 Jul Allegiant Air
14 Jul Allegiant Air
19 Jul Icelandair direct
14 Jul Icelandair direct
11 Jul Allegiant Air
13 Jul Allegiant Air
25 Jul Air Canada
20 Jul Icelandair direct
29 Jul Icelandair direct

Also check the deals for return flights from Washington to Keflavik in July.

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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