AirHint found the following cheapest return flights from Washington (IAD) to Oslo (OSL) in April 2026 (see full year).

Return flights

07 Apr - 14 Apr	Icelandair
13 Apr - 20 Apr	Icelandair
16 Apr - 23 Apr	Icelandair
19 Apr - 26 Apr	Icelandair
11 Apr - 18 Apr	Icelandair
12 Apr - 19 Apr	Icelandair
14 Apr - 21 Apr	Icelandair
18 Apr - 25 Apr	Icelandair
20 Apr - 27 Apr	Icelandair
08 Apr - 15 Apr	Icelandair
25 Apr - 02 May	Icelandair
28 Apr - 05 May	Icelandair
29 Apr - 06 May	Icelandair
26 Apr - 03 May	Icelandair
30 Apr - 07 May	Icelandair
27 Apr - 04 May	Air France
24 Apr - 01 May	Scandinavian Airlines

Also check the deals for one-way flights from Washington to Oslo 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 Oslo in April from $423

Return flights