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

Return flights

03 Jul - 18 Jul	easyJet
07 Jul - 15 Jul	easyJet
16 Jul - 22 Jul	Ryanair
17 Jul - 25 Jul	easyJet
03 Jul - 09 Jul	easyJet
01 Jul - 15 Jul	Ryanair
01 Jul - 07 Jul	Ryanair
09 Jul - 14 Jul	Ryanair
13 Jul - 15 Jul	Ryanair
06 Jul - 09 Jul	Ryanair
25 Jul - 08 Aug	Ryanair
26 Jul - 01 Aug	Ryanair

Also check the deals for one-way flights from London 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.

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Cheapest return flights from London to Keflavik in July from $284

Return flights