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Cheapest one-way flights from Lisbon (LIS) to Keflavik (KEF), September

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Dates, airline, and price
Dates	Airline	Price
23 Sep	Ryanair
16 Sep	Ryanair
30 Sep	Ryanair
17 Sep	Ryanair
19 Sep	easyJet
29 Sep	Ryanair
25 Sep	Vueling Airlines
15 Sep	Ryanair
01 Sep	Ryanair
24 Sep	Ryanair

deals for return flights from Lisbon to Keflavik in September.

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Updated Jul 21, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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Cheapest one-way flights from Lisbon (LIS) to Keflavik (KEF), September

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