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

Return flights

10 Mar - 17 Mar	Icelandair
02 Mar - 09 Mar	Scandinavian Airlines
04 Mar - 11 Mar	Scandinavian Airlines
03 Mar - 10 Mar	TAP
01 Mar - 08 Apr	SWISS
23 Mar - 29 Mar	Air France
01 Mar - 08 Mar	Air France
18 Mar - 25 Mar	Air France
09 Mar - 16 Mar	Air France
23 Mar - 30 Mar	Air France
24 Mar - 31 Mar	Air France
25 Mar - 01 Apr	Air France
31 Mar - 07 Apr	Air France
30 Mar - 06 Apr	KLM
26 Mar - 02 Apr	Icelandair
28 Mar - 04 Apr	KLM
27 Mar - 03 Apr	Air France

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

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 March from 363€

Return flights