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

Return flights

13 May - 19 May	Scandinavian Airlines
04 May - 15 May	jetBlue
24 May - 11 Jun	British Airways
26 May - 09 Jun	British Airways
22 May - 06 Jun	jetBlue
26 May - 19 Jun	jetBlue
29 May - 11 Jun	British Airways
24 May - 07 Jun	British Airways
29 May - 16 Jun	British Airways
25 May - 20 Jun	Air Canada
26 May - 20 Jun	Air Canada
25 May - 22 Jun	British Airways
14 May - 19 May	Royal Jordanian

Also check the deals for one-way flights from Washington to Istanbul 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 Washington to Istanbul in May from $803

Return flights