Singapore (SIN) to Istanbul (IST): 5,394 miles (8,681 km) great-circle, about 11h 15m nonstop by our estimate. Cheapest fare observed: $552 round-trip on Gulf Air, with 1 stop, departing June 4, 2026.
$552 round-trip, Gulf Air GF166, departing 2026-06-04 at 20:00, returning 2026-06-11. The recorded itinerary left on a Thursday, returning on a Thursday 7 nights later; the fare was observed 40 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $552, it ranked 24th of the 30 round-trip fares we recorded from SIN (median $361). That is 10.2 cents per great-circle mile (round-trip price over one-way distance), below the SIN median of 19.9 cents across 30 round-trip routes.
Routes from SIN of similar length: Moscow (5,252 mi) at $661 and St. Petersburg (5,577 mi) at $948.
Gulf Air had the cheapest fare on 2 of 30 SIN routes. It is the 3rd longest of the 30 routes we track from SIN.
Of 117 departure airports with a fare to Istanbul, Singapore (SIN) ranked 57th at $552. Lowest: $60 from Antalya (AYT); highest: $1639 from Wellington (WLG); 29 nonstop. Cheapest-fare airlines (routes): Pegasus Airlines (13), Qatar (7), WestJet (6), Wizz Air (6), Gulf Air (5) and Turkish (5), plus 51 more.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones Asia/Singapore, Europe/Istanbul; flight time is our estimate.