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

Return flights

27 Aug - 02 Sep	Norwegian
30 Aug - 13 Sep	TAP
30 Aug - 10 Sep	TAP
23 Aug - 03 Sep	TAP
07 Aug - 12 Aug	Ryanair
30 Aug - 07 Sep	TAP	direct
23 Aug - 26 Aug	TAP	direct
30 Aug - 02 Sep	TAP	direct
23 Aug - 25 Sep	TAP
23 Aug - 25 Aug	TAP
28 Aug - 01 Sep	TAP
23 Aug - 27 Aug	TAP
20 Aug - 23 Aug	Norwegian
29 Aug - 01 Sep	TAP
06 Aug - 10 Aug	Ryanair
27 Aug - 03 Sep	Norwegian
07 Aug - 10 Aug	Ryanair
20 Aug - 23 Aug	Norwegian	direct
19 Aug - 23 Aug	KLM
19 Aug - 25 Aug	KLM

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

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 Lisbon to Oslo in August from 187€

Return flights