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

Return flights

03 Jul - 15 Jul	Ryanair
11 Jul - 19 Jul	Ryanair
10 Jul - 25 Jul	easyJet
24 Jul - 01 Aug	easyJet
10 Jul - 19 Jul	easyJet
01 Jul - 15 Jul	Ryanair
01 Jul - 06 Jul	Ryanair
18 Jul - 31 Jul	Ryanair
22 Jul - 31 Jul	Ryanair
05 Jul - 13 Jul	Ryanair
04 Jul - 12 Jul	easyJet
28 Jul - 06 Aug	Ryanair
22 Jul - 01 Aug	easyJet
23 Jul - 01 Aug	easyJet
25 Jul - 01 Aug	Ryanair
30 Jul - 02 Aug	Ryanair
30 Jul - 09 Aug	easyJet

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 $306

Return flights