Bangkok (BKK) to Irkutsk (IKT): 2,674 miles (4,303 km) great-circle, about 5h 50m nonstop by our estimate. Cheapest fare observed: $587 round-trip on S7 Airlines, nonstop, departing June 2, 2026.
$587 round-trip, S7 Airlines S76306, departing 2026-06-02 at 15:55, returning 2026-07-28. The recorded itinerary left on a Tuesday, returning on a Tuesday 56 nights later; the fare was observed 38 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $587, it ranked 21st of the 30 round-trip fares we recorded from BKK (median $259). That is 22.0 cents per great-circle mile (round-trip price over one-way distance), close to the BKK median of 20.6 cents across 30 round-trip routes.
Routes from BKK of similar length: Tashkent (2,683 mi) at $506 and Harbin (2,662 mi) at $310.
BKK to IKT is the only one of 30 BKK routes where S7 Airlines priced cheapest. It is the 11th longest of the 30 routes we track from BKK.
Of 17 departure airports with a fare to Irkutsk, Bangkok (BKK) ranked 4th at $587. Lowest: $342 from Beijing (PEK); highest: $1507 from Nairobi (NBO); 4 nonstop. Cheapest-fare airlines (routes): Air China (4), S7 Airlines (3), Egyptair (2), Asiana (1), China Eastern (1) and MIAT Mongolian Airlines (1), plus 5 more.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones Asia/Bangkok, Asia/Irkutsk; flight time is our estimate.