AirHint found the following cheapest return flights from Washington (DCA) to Keflavik (KEF) in April 2026 (see full year).

Return flights

06 Apr - 14 Apr	Virgin Atlantic
16 Apr - 25 Apr	KLM
12 Apr - 19 Apr	Air France
13 Apr - 20 Apr	Air France
18 Apr - 25 Apr	Virgin Atlantic
30 Apr - 06 May	Air France
30 Apr - 04 May	Air France
23 Apr - 30 Apr	Virgin Atlantic
22 Apr - 29 Apr	jetBlue
30 Apr - 25 May	Air France
02 Apr - 09 Apr	jetBlue
07 Apr - 15 Apr	jetBlue
21 Apr - 28 Apr	Air Canada
23 Apr - 11 May	Delta
01 Apr - 01 May	KLM
20 Apr - 05 May	British Airways

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

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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Cheapest return flights from Washington to Keflavik in April from 452€

Return flights