Cheapest return flights from Lisbon to Keflavik in September from 274€

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

Return flights

15 Sep - 22 Sep TAP
22 Sep - 27 Sep Ryanair
29 Sep - 08 Oct TAP
17 Sep - 24 Sep Ryanair
10 Sep - 20 Sep KLM
27 Sep - 08 Oct easyJet
05 Sep - 14 Sep easyJet
06 Sep - 15 Sep Ryanair
03 Sep - 13 Sep Ryanair
06 Sep - 25 Sep Ryanair
03 Sep - 22 Sep KLM
01 Sep - 11 Sep easyJet

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

Powered by

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 Keflavik

Cheap car rent in Keflavik

Feel free to contact us with any feedback or request another flight research.