Tokyo (HND) to Hanoi (HAN): 2,275 miles (3,661 km) great-circle, about 5h 05m nonstop by our estimate. Cheapest fare observed: $421 round-trip on Korean Air, with 1 stop, departing May 18, 2026.
$421 round-trip, Korean Air KE2104, departing 2026-05-18 at 19:55, returning 2026-06-01. The recorded itinerary left on a Monday, returning on a Monday 14 nights later; the fare was observed 23 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $421, it ranked 10th of the 30 round-trip fares we recorded from HND (median $554). That is 18.5 cents per great-circle mile (round-trip price over one-way distance), below the HND median of 24.0 cents across 30 round-trip routes.
Routes from HND of similar length: Irkutsk (2,075 mi) at $1094 and Nha Trang (2,507 mi) at $436.
HND to HAN is the only one of 30 HND routes where Korean Air priced cheapest. It is the 17th longest of the 30 routes we track from HND.
Of 9 departure airports with a fare to Hanoi, Tokyo (HND) ranked 7th at $421. Lowest: $170 from Bangkok (BKK); highest: $523 from Sydney (SYD); 4 nonstop. Cheapest-fare airlines (routes): Vietravel Airlines (2), China Eastern (1), HK Express (1), IndiGo (1), Korean Air (1) and Shenzhen Airlines (1), plus 2 more.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones Asia/Tokyo, Asia/Ho_Chi_Minh; flight time is our estimate.