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

Return flights

02 Dec - 07 Dec	Air Serbia
16 Dec - 23 Dec	Lufthansa	direct
02 Dec - 07 Dec	Lufthansa	direct
27 Dec - 07 Jan	Air France
19 Dec - 26 Dec	Air Serbia
23 Dec - 26 Dec	Air Serbia
18 Dec - 29 Dec	Air Serbia
19 Dec - 26 Dec	Lufthansa	direct
23 Dec - 06 Jan	Air France
22 Dec - 25 Dec	Lufthansa	direct
23 Dec - 06 Jan	Lufthansa	direct
27 Dec - 07 Jan	Lufthansa	direct
23 Dec - 26 Dec	Turkish Airlines	direct
18 Dec - 29 Dec	Turkish Airlines	direct
16 Dec - 05 Jan	Aegean Airlines

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

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 Frankfurt to Istanbul in December from $195

Return flights