AirHint found the following cheapest return flights from Frankfurt (FRA) to Oslo (OSL) in October 2025 (see full year).

Return flights

09 Oct - 12 Oct	Ryanair
13 Oct - 17 Oct	Ryanair
13 Oct - 22 Oct	easyJet
16 Oct - 22 Oct	easyJet
09 Oct - 15 Oct	easyJet
07 Oct - 14 Oct	easyJet
09 Oct - 14 Oct	easyJet
07 Oct - 12 Oct	easyJet
08 Oct - 13 Oct	easyJet
13 Oct - 19 Oct	easyJet
27 Oct - 01 Nov	Ryanair
29 Oct - 03 Nov	KLM
29 Oct - 04 Nov	KLM
29 Oct - 04 Nov	Lufthansa	direct
29 Oct - 03 Nov	Lufthansa	direct
27 Oct - 01 Nov	Lufthansa	direct

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

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 Frankfurt to Oslo in October from $156

Return flights