AirHint found the following cheapest return flights from Keflavik (KEF) to Lisbon (LIS) in November 2025 (see full year).

Return flights

10 Nov - 17 Nov	easyJet
10 Nov - 15 Nov	easyJet
20 Nov - 23 Nov	easyJet
10 Nov - 16 Nov	easyJet
14 Nov - 23 Nov	easyJet
07 Nov - 10 Nov	easyJet
10 Nov - 17 Nov	Fly Play	direct
03 Nov - 10 Nov	Fly Play	direct
07 Nov - 10 Nov	Fly Play	direct
02 Nov - 10 Nov	Wizz Air

Also check the deals for one-way flights from Keflavik to Lisbon in November.

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 Keflavik to Lisbon in November from 157€

Return flights