AirHint found the following cheapest return flights from Oslo (OSL) to Lisbon (LIS) in September 2026 (see full year).

Return flights

09 Sep - 26 Sep	Vueling Airlines
05 Sep - 26 Sep	Vueling Airlines
09 Sep - 26 Sep	Norwegian	direct
24 Sep - 03 Oct	Iberia
25 Sep - 03 Oct	transavia
26 Sep - 03 Oct	TAP	direct
24 Sep - 03 Oct	TAP	direct
25 Sep - 04 Oct	transavia
27 Sep - 04 Oct	Ryanair
25 Sep - 03 Oct	TAP	direct
24 Sep - 04 Oct	transavia
24 Sep - 04 Oct	TAP	direct
27 Sep - 04 Oct	TAP	direct
10 Sep - 26 Sep	Norwegian
24 Sep - 26 Sep	Norwegian

Also check the deals for one-way flights from Oslo to Lisbon in September.

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 Lisbon in September from 211€

Return flights