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

Return flights

05 May - 10 May	AJet	direct
05 May - 11 May	AJet	direct
13 May - 20 May	Pegasus Airlines	direct
11 May - 15 May	AJet	direct
15 May - 19 May	AJet	direct
01 May - 06 May	Lufthansa	direct
20 May - 26 May	AJet	direct
01 May - 20 May	Lufthansa	direct
01 May - 07 May	Lufthansa	direct
19 May - 23 May	Lufthansa	direct
24 May - 06 Jun	AJet	direct
31 May - 15 Jun	AJet	direct

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

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Cheapest return flights from Istanbul to Frankfurt in May from 116€

Return flights