Cheapest return flights from Washington to Keflavik in July from $599

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 July 2025 (see full year).

Return flights

01 Jul - 08 Jul jetBlue
28 Jul - 04 Aug jetBlue
21 Jul - 31 Jul Air Canada
08 Jul - 15 Jul jetBlue
09 Jul - 16 Jul jetBlue
07 Jul - 14 Jul jetBlue
24 Jul - 31 Jul Air Canada
25 Jul - 01 Aug Air Canada
31 Jul - 07 Aug Air Canada
04 Jul - 11 Jul Air Canada
10 Jul - 17 Jul Air Canada
11 Jul - 18 Jul Air Canada
17 Jul - 24 Jul Air Canada
30 Jul - 06 Aug United
27 Jul - 03 Aug Air Canada
26 Jul - 02 Aug jetBlue
29 Jul - 03 Aug Air Canada
31 Jul - 09 Aug Icelandair
21 Jul - 01 Aug Icelandair

Also check the deals for one-way 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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik