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

Return flights

19 May - 28 May	Ryanair
14 May - 18 May	Ryanair
14 May - 17 May	Ryanair
28 May - 31 May	Ryanair
25 May - 28 May	Ryanair
09 May - 17 May	Ryanair
29 May - 31 May	KLM
30 May - 04 Jun	KLM
30 May - 05 Jun	KLM
24 May - 30 May	KLM
14 May - 19 May	LOT
22 May - 24 May	LOT
14 May - 07 Jun	Finnair
22 May - 05 Jun	LOT
30 May - 04 Jun	Lufthansa	direct
30 May - 05 Jun	Lufthansa	direct
22 May - 05 Jun	Lufthansa	direct
14 May - 07 Jun	Lufthansa	direct

Also check the deals for one-way flights from Frankfurt to Oslo 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.

Book a cheap hotel in Oslo

Cheap car rent in Oslo

Cheapest return flights from Frankfurt to Oslo in May from 144€

Return flights