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

Return flights

23 Jul - 25 Jul	Ryanair
12 Jul - 15 Jul	Ryanair
21 Jul - 25 Jul	Ryanair
07 Jul - 14 Jul	Ryanair
22 Jul - 07 Aug	Ryanair
17 Jul - 01 Aug	Ryanair
13 Jul - 15 Jul	Ryanair
12 Jul - 14 Jul	Ryanair
28 Jul - 04 Aug	Ryanair
16 Jul - 23 Jul	Ryanair
07 Jul - 12 Jul	Ryanair
17 Jul - 21 Jul	Ryanair
09 Jul - 12 Jul	Ryanair

Also check the deals for one-way flights from Prestwick 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 Prestwick to Keflavik in July from 429€

Return flights