Cheapest return flights from Washington to Oslo in September from $474

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

Return flights

14 Sep - 30 Sep Icelandair
27 Sep - 04 Oct Icelandair
28 Sep - 05 Oct Icelandair
23 Sep - 30 Sep Icelandair
24 Sep - 01 Oct Icelandair
16 Sep - 23 Sep Icelandair
02 Sep - 09 Sep Icelandair
04 Sep - 11 Sep Icelandair
06 Sep - 13 Sep Icelandair
09 Sep - 16 Sep Icelandair
11 Sep - 18 Sep Icelandair
13 Sep - 20 Sep Icelandair
17 Sep - 24 Sep Icelandair
30 Sep - 07 Oct Scandinavian Airlines
29 Sep - 06 Oct Icelandair
26 Sep - 03 Oct Icelandair
25 Sep - 02 Oct Air France
24 Sep - 06 Oct TAP

Also check the deals for one-way flights from Washington to Oslo in September.

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