AirHint found the following cheapest one-way flights from London (LHR) to Istanbul (IST) in April 2026 (see full year).
One-Way flights
| 19 Apr | Air Serbia | ||
| 10 Apr | Air Serbia | ||
| 12 Apr | Air Serbia | ||
| 01 Apr | KLM | ||
| 07 Apr | KLM | ||
| 08 Apr | KLM | ||
| 05 Apr | KLM | ||
| 25 Apr | KLM | ||
| 03 Apr | KLM | ||
| 02 Apr | KLM |
Also check the deals for return flights from London to Istanbul in April.
Powered by
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