AirHint found the following cheapest return flights from Washington (DCA) to Istanbul (IST) in October 2025 (see full year).

Return flights

01 Oct - 07 Oct	jetBlue
31 Oct - 14 Nov	KLM
14 Oct - 28 Oct	British Airways
14 Oct - 08 Nov	Air Canada
15 Oct - 08 Nov	Air Canada
15 Oct - 22 Oct	Finnair
10 Oct - 20 Oct	jetBlue
20 Oct - 16 Nov	Air Canada
18 Oct - 25 Oct	jetBlue
08 Oct - 01 Nov	Air Canada
14 Oct - 26 Oct	Air Canada
24 Oct - 15 Nov	British Airways
30 Oct - 04 Nov	Air Canada
06 Oct - 01 Nov	British Airways
09 Oct - 01 Nov	Air Canada
11 Oct - 01 Nov	British Airways
04 Oct - 18 Oct	British Airways
03 Oct - 08 Oct	LOT
10 Oct - 26 Oct	British Airways
07 Oct - 14 Oct	British Airways

Also check the deals for one-way flights from Washington to Istanbul in October.

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 Washington to Istanbul in October from $774

Return flights