Osaka (KIX) to London (LON): 5,923 miles (9,532 km) great-circle, about 12h 20m nonstop by our estimate. Cheapest fare observed: $1146 round-trip on Air Seoul, with 2 stops, departing May 19, 2026.
$1146 round-trip, Air Seoul RS712, departing 2026-05-19 at 10:05, returning 2026-05-30. The recorded itinerary left on a Tuesday, returning on a Saturday 11 nights later; the fare was observed 24 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $1146, it ranked 25th of the 30 round-trip fares we recorded from KIX (median $608). That is 19.3 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: Istanbul (5,434 mi) at $684 and Minsk (4,958 mi) at $1174.
Air Seoul had the cheapest fare on 2 of 30 KIX routes. It is the longest of the 30 routes we track from KIX.
Of 49 departure airports with a fare to London, Osaka (KIX) ranked 46th at $1146. Lowest: $46 from Dublin (DUB); highest: $1356 from Sydney (SYD); 14 nonstop. Cheapest-fare airlines (routes): Ryanair (7), easyJet (4), Etihad (4), Frontier (4), Air Canada (3) and WestJet (3), plus 19 more.
That depends on your passport and trip, so check the official source for United Kingdom: GOV.UK: check if you need a UK visa. Connecting elsewhere? Check that country's transit rules too.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones Asia/Tokyo, Europe/London; flight time is our estimate.