AirHint found the following cheapest one-way flights from Frankfurt (FRA) to Istanbul (SAW) in December 2025 (see full year).

One-Way flights

06 Dec	Pegasus Airlines	direct
03 Dec	Pegasus Airlines	direct
11 Dec	Pegasus Airlines	direct
28 Dec	AJet	direct
16 Dec	AJet	direct
14 Dec	AJet	direct
26 Dec	AJet
25 Dec	Pegasus Airlines	direct
26 Dec	AJet	direct
21 Dec	Air Serbia

Also check the deals for return 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 one-way flights from Frankfurt to Istanbul in December from $81

One-Way flights