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

Return flights

15 Oct - 20 Oct	Ryanair
18 Oct - 20 Oct	Ryanair
18 Oct - 25 Oct	Ryanair
22 Oct - 29 Oct	Ryanair
21 Oct - 25 Oct	Ryanair
10 Oct - 13 Oct	Ryanair
14 Oct - 19 Oct	Ryanair
10 Oct - 15 Oct	Ryanair
28 Oct - 31 Oct	Ryanair
07 Oct - 14 Oct	easyJet
31 Oct - 03 Nov	Vueling Airlines
27 Oct - 04 Nov	Ryanair
27 Oct - 02 Nov	Ryanair
28 Oct - 12 Nov	easyJet
25 Oct - 01 Nov	Air Europa
31 Oct - 02 Nov	Vueling Airlines
25 Oct - 03 Nov	TAP	direct
22 Oct - 11 Nov	Vueling Airlines
29 Oct - 11 Nov	Vueling Airlines
25 Oct - 11 Nov	Norwegian

Also check the deals for one-way flights from Lisbon 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 Lisbon to Oslo in October from 124€

Return flights