Osaka (KIX) to Istanbul (IST): 5,434 miles (8,746 km) great-circle, about 11h 20m nonstop by our estimate. Cheapest fare observed: $684 round-trip on Air Seoul, with 2 stops, departing May 19, 2026.
$684 round-trip, Air Seoul RS712, departing 2026-05-19 at 10:05, returning 2026-05-26. The recorded itinerary left on a Tuesday, returning on a Tuesday 7 nights later; the fare was observed 24 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $684, it ranked 18th of the 30 round-trip fares we recorded from KIX (median $608). That is 12.6 cents per great-circle mile (round-trip price over one-way distance), below the KIX median of 24.3 cents across 30 round-trip routes.
Routes from KIX of similar length: Minsk (4,958 mi) at $1174 and London (5,923 mi) at $1146.
Air Seoul had the cheapest fare on 2 of 30 KIX routes. It is the 2nd longest of the 30 routes we track from KIX.
Of 117 departure airports with a fare to Istanbul, Osaka (KIX) ranked 69th at $684. 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/Tokyo, Europe/Istanbul; flight time is our estimate.