London to Hanoi (Soc Son)
11h 54m The flight from London Heathrow Airport (LHR) to Noi Bai International Airport (HAN) covers 9,238 km (5,740 miles) and takes approximately 11h 54m gate to gate for a typical jet.
The route heads north-east on an initial great-circle bearing of 64°, passing near 49.9° N, 67.5° E at its midpoint.
The route
The great-circle path — the shortest line between the two airports across the curve of the earth. On a flat map it looks bent; on a globe it is straight.
Flight time at different cruise speeds
Aircraft type, winds and routing all move the real number. This is the same distance flown at different speeds, plus the 25-minute ground and climb allowance.
| Typical of | Cruise speed | Airborne | Gate to gate |
|---|---|---|---|
| Turboprop / regional | 550 km/h | 16h 48m | 17h 13m |
| Narrowbody jet (A320, 737) | 780 km/h | 11h 51m | 12h 16m |
| Widebody jet (777, 787, A350) | 900 km/h | 10h 16m | 10h 41m |
| Private jet (Gulfstream) | 850 km/h | 10h 52m | 11h 17m |
Headwinds on an eastbound long-haul routinely add 30–60 minutes; the same route westbound can be quicker. Airlines publish schedules with padding built in.
Both airports
| LHR | HAN | |
|---|---|---|
| Airport | London Heathrow Airport | Noi Bai International Airport |
| City | London | Hanoi (Soc Son) |
| Country | United Kingdom | Vietnam |
| ICAO | EGLL | VVNB |
| Coordinates | 51.4707, -0.4599 | 21.2212, 105.807 |
| Elevation | 83 ft | 39 ft |
Questions
How long is the flight from London to Hanoi (Soc Son)?
A non-stop flight from London (LHR) to Hanoi (Soc Son) (HAN) takes about 11h 54m. The great-circle distance is 9,238 km (5,740 miles, 4,988 nautical miles), flying north-east on an initial bearing of 64°.
How far is London from Hanoi (Soc Son)?
9,238 kilometres in a straight line over the earth's surface — 5,740 miles or 4,988 nautical miles. Actual flown distance is usually 2–5% longer because aircraft follow airways, avoid weather and route around restricted airspace.
Is there a non-stop flight between LHR and HAN?
This page calculates the direct-line time and distance; it does not track airline schedules. At 9,238 km the route is comfortably within range of a non-stop service if an airline chooses to fly it. Check an airline or booking site for what is actually scheduled.
What should I expect on a 11h 54m flight?
Anything past six hours is a long-haul flight: expect at least one meal service, a significant time-zone shift, and enough sitting that circulation and hydration start to matter. Cabin altitude, dry air and disrupted sleep do more damage to a training routine than the flight itself.
Other routes from London
Airport coordinates from OurAirports (public domain). Distance is a great-circle calculation; flight time uses the model described on the method page. Flight times are great-circle estimates for planning only — always check the airline's published schedule.