AirHint found the following cheapest return flights from London (LCY) to Istanbul (IST) in May 2026 (see full year).

Return flights

08 May - 12 May	Lufthansa
04 May - 12 May	Lufthansa
01 May - 06 May	Lufthansa
01 May - 12 May	Lufthansa
04 May - 07 May	Lufthansa
05 May - 09 Jun	Lufthansa
08 May - 15 May	Lufthansa
01 May - 11 May	Lufthansa
05 May - 14 May	Lufthansa
25 May - 08 Jun	Lufthansa
01 May - 04 May	Lufthansa
18 May - 25 May	Lufthansa
30 May - 06 Jun	KLM
19 May - 02 Jun	Lufthansa
24 May - 07 Jun	ITA Airways

Also check the deals for one-way flights from London to Istanbul 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.

Book a cheap hotel in Istanbul

Cheap car rent in Istanbul

Cheapest return flights from London to Istanbul in May from 252€

Return flights