Hong Kong (HKG) to Seoul (SEL): 1,286 miles (2,069 km) great-circle, about 3h 05m nonstop by our estimate. Cheapest fare observed: $234 round-trip on HK Express, nonstop, departing April 26, 2026.
$234 round-trip, HK Express UO616, departing 2026-04-26 at 00:50, returning 2026-04-28. The recorded itinerary left on a Sunday, returning on a Tuesday 2 nights later; the fare was observed 1 day before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $234, it ranked 8th of the 30 round-trip fares we recorded from HKG (median $303). That is 18.2 cents per great-circle mile (round-trip price over one-way distance), below the HKG median of 22.1 cents across 30 round-trip routes.
Routes from HKG of similar length: Beijing (1,238 mi) at $166 and Phuket (1,427 mi) at $252.
HK Express had the cheapest fare on 10 of 30 HKG routes. It is the 19th longest of the 30 routes we track from HKG.
Of 24 departure airports with a fare to Seoul, Hong Kong (HKG) ranked 7th at $234. Lowest: $142 from Osaka (KIX); highest: $1288 from Portland (PDX); 10 nonstop. Cheapest-fare airlines (routes): Jetstar (2), Peach Aviation (2), airline 9G (1), airline WE (1), Alaska Airlines (1) and Asiana (1), plus 16 more.
That depends on your passport and trip, so check the official source for South Korea: Republic of Korea: K-ETA. 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/Hong_Kong, Asia/Seoul; flight time is our estimate.