AirHint found the following cheapest return flights from London (STN) to Keflavik (KEF) in July 2025 (see full year).

Return flights

16 Jul - 27 Jul	Jet2
16 Jul - 23 Jul	Jet2
30 Jul - 03 Aug	Ryanair
30 Jul - 06 Aug	Ryanair
29 Jul - 05 Aug	Ryanair
30 Jul - 08 Aug	Ryanair
22 Jul - 28 Jul	Jet2
21 Jul - 28 Jul	Jet2
28 Jul - 30 Jul	Ryanair
16 Jul - 21 Jul	Jet2
15 Jul - 21 Jul	Ryanair
21 Jul - 27 Jul	Jet2
30 Jul - 31 Jul	Ryanair
29 Jul - 31 Jul	Ryanair
31 Jul - 03 Aug	Ryanair
31 Jul - 05 Aug	Ryanair
31 Jul - 02 Aug	Ryanair
22 Jul - 18 Aug	Ryanair
31 Jul - 12 Aug	Ryanair
30 Jul - 03 Aug	Fly Play	direct

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Cheapest return flights from London to Keflavik in July from 240€

Return flights