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

Return flights

07 Jul - 22 Jul	easyJet
28 Jul - 05 Aug	easyJet
21 Jul - 01 Aug	easyJet
01 Jul - 22 Jul	Ryanair
28 Jul - 03 Aug	Ryanair
24 Jul - 01 Aug	easyJet
03 Jul - 06 Jul	Ryanair
15 Jul - 21 Jul	Ryanair
24 Jul - 05 Aug	easyJet
12 Jul - 22 Jul	Ryanair
03 Jul - 15 Jul	Ryanair
15 Jul - 22 Jul	Ryanair
11 Jul - 18 Jul	Ryanair
31 Jul - 08 Aug	Ryanair
11 Jul - 15 Jul	Ryanair
13 Jul - 20 Jul	Ryanair
18 Jul - 01 Aug	Ryanair
29 Jul - 05 Aug	Ryanair
19 Jul - 01 Aug	Ryanair
24 Jul - 02 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 $252

Return flights