Cheapest return IAD–OSL flights, May

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

Return flights

11 May - 26 May TAP
04 May - 11 May Air France
05 May - 12 May Air France
06 May - 13 May Air France
10 May - 17 May Icelandair
08 May - 15 May Air France
11 May - 18 May Air France
12 May - 19 May Air France
07 May - 14 May Air France
13 May - 20 May KLM
26 May - 02 Jun Icelandair
28 May - 04 Jun Icelandair
27 May - 03 Jun Icelandair
31 May - 07 Jun Icelandair
31 May - 06 Jun Lufthansa
30 May - 06 Jun Icelandair
29 May - 05 Jun Air France
20 May - 07 Jun Icelandair
21 May - 07 Jun Lufthansa

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

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