AirHint found the following cheapest return flights from Istanbul (IST) to Keflavik (KEF) in May 2026 (see full year).
Return flights
| 27 May - 31 May | Wizz Air UK | ||
| 26 May - 30 May | Wizz Air UK | ||
| 22 May - 30 May | Wizz Air UK | ||
| 26 May - 31 May | Wizz Air | ||
| 10 May - 20 May | LOT | ||
| 27 May - 30 May | Turkish Airlines |
Also check the deals for one-way flights from Istanbul to Keflavik in May.
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.
Find us on social media