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

Return flights

20 Jul - 27 Jul	SWISS
14 Jul - 21 Jul	Vueling Airlines
21 Jul - 28 Jul	Vueling Airlines
01 Jul - 08 Jul	Ryanair
28 Jul - 04 Aug	Vueling Airlines
25 Jul - 01 Aug	TAP
25 Jul - 05 Aug	easyJet
04 Jul - 11 Jul	easyJet
10 Jul - 17 Jul	Transavia France
18 Jul - 25 Jul	TAP
08 Jul - 22 Jul	Vueling Airlines
02 Jul - 09 Jul	Vueling Airlines
22 Jul - 29 Jul	easyJet
26 Jul - 02 Aug	Icelandair	direct
26 Jul - 05 Aug	KLM
29 Jul - 05 Aug	easyJet
23 Jul - 02 Aug	Icelandair	direct
30 Jul - 09 Aug	Icelandair	direct
30 Jul - 06 Aug	Icelandair	direct
22 Jul - 05 Aug	Vueling Airlines

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

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

Cheapest return flights from Lisbon to Keflavik in July from $348

Return flights