Cheapest return flights from Frankfurt to Istanbul in December from $131

Best time to book flights for Frankfurt (FRA) to Istanbul (IST) flights at AirHint

AirHint found the following cheapest return flights from Frankfurt (FRA) to Istanbul (IST) in December 2025 (see full year).

Return flights

10 Dec - 17 Dec Ryanair
09 Dec - 19 Dec Pegasus Airlines direct
10 Dec - 17 Dec Pegasus Airlines direct
04 Dec - 08 Dec Pegasus Airlines direct
02 Dec - 04 Dec Pegasus Airlines direct
01 Dec - 04 Dec Pegasus Airlines direct
02 Dec - 05 Dec Air Serbia
03 Dec - 10 Dec Pegasus Airlines direct
15 Dec - 18 Dec Pegasus Airlines direct
12 Dec - 15 Dec Pegasus Airlines direct
23 Dec - 01 Jan Air Serbia
26 Dec - 15 Jan AJet
17 Dec - 03 Jan Air Serbia
26 Dec - 15 Jan Turkish Airlines direct
24 Dec - 05 Jan TAROM
19 Dec - 10 Jan Air Serbia
15 Dec - 04 Jan Air Serbia
31 Dec - 04 Jan Pegasus Airlines
17 Dec - 03 Jan Lufthansa direct
31 Dec - 04 Jan Lufthansa direct

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

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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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