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

Return flights

01 Jul - 15 Jul	easyJet
04 Jul - 18 Jul	easyJet
05 Jul - 19 Jul	Transavia France
02 Jul - 16 Jul	Iberia Express
23 Jul - 31 Jul	Scandinavian Airlines
02 Jul - 09 Jul	easyJet
14 Jul - 23 Jul	easyJet
16 Jul - 26 Jul	Icelandair	direct
31 Jul - 15 Aug	Scandinavian Airlines
08 Jul - 06 Aug	easyJet
02 Jul - 09 Jul	Icelandair	direct
02 Jul - 16 Jul	Icelandair	direct

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

Cheap car rent in Lisbon

Cheapest return flights from Keflavik to Lisbon in July from 355€

Return flights