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

Return flights

03 May - 10 May	KLM
04 May - 11 May	KLM
05 May - 12 May	KLM
12 May - 19 May	KLM
18 May - 25 May	KLM
11 May - 18 May	KLM
19 May - 26 May	KLM
20 May - 27 May	KLM
07 May - 14 May	KLM
06 May - 13 May	KLM
27 May - 03 Jun	LOT
26 May - 02 Jun	KLM
30 May - 06 Jun	Scandinavian Airlines
28 May - 04 Jun	KLM
23 May - 07 Jun	United
31 May - 07 Jun	Scandinavian Airlines
29 May - 05 Jun	Scandinavian Airlines

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

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 Oslo to San Francisco in May from 420€

Return flights