Sofia (SOF) to Istanbul (IST): 290 miles (467 km) great-circle, about 1h 05m nonstop by our estimate. Cheapest fare observed: $131 round-trip on Pegasus Airlines, nonstop, departing May 6, 2026.
$131 round-trip, Pegasus Airlines PC272, departing 2026-05-06 at 13:45, returning 2026-05-09. The recorded itinerary left on a Wednesday, returning on a Saturday 3 nights later; the fare was observed 11 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $131, it ranked 13th of the 30 round-trip fares we recorded from SOF (median $161). That is 45.2 cents per great-circle mile (round-trip price over one-way distance), above the SOF median of 21.2 cents across 30 round-trip routes.
Routes from SOF of similar length: Athens (330 mi) at $205 and Varna (226 mi) at $179.
Pegasus Airlines had the cheapest fare on 6 of 30 SOF routes. It is the 28th longest of the 30 routes we track from SOF.
Of 117 departure airports with a fare to Istanbul, Sofia (SOF) ranked 8th at $131. 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 Europe/Sofia, Europe/Istanbul; flight time is our estimate.