Compare: London→Singapore (10,848 km) vs London→Hong Kong (9,623 km). London → Hong Kong wins by 1,225 km (11%). Side-by-side with flight & drive times.
By SnapDistance Team
10,848 km
6,741 miles · Flight: ~14h 4min
9,623 km
5,979 miles · Flight: ~12h 32min
✓ Shorter route
Difference: 1,225 km (11%) · Flight time difference: ~1h 32min
Verdict
London → Hong Kong is the smarter pick if travel time and emissions matter most: it is 1,225 km (11%) shorter, saves about 1h 32min of flight time, and cuts roughly 312 kg of CO₂ per passenger. Choose London → Singapore only if the destination itself is the reason for the trip.
London → Hong Kong is the shorter route at 9,623 km, which is 1,225 km (11%) shorter than London → Singapore. You would save approximately 1h 32min in flight time by choosing the shorter route.
| Metric | London → Singapore | London → Hong Kong |
|---|---|---|
| Distance (km) | 10,848 | 9,623 |
| Distance (miles) | 6,741 | 5,979 |
| Flight time | ~14h 4min | ~12h 32min |
| Driving time | No road estimate | No road estimate |
| Road distance (rough estimate) | Not published | Not published |
| Continuous road link? | No | No |
| Cross-continental | Yes | Yes |
| Initial bearing | 78° (ENE) | 58° (ENE) |
| Time-zone shift | +7h | +7h |
| CO₂ – flight (per pax) | ~2,766 kg | ~2,454 kg |
| CO₂ – driving (per car) | — | — |
| Fuel cost (est.) | — | — |
Flying from London to Singapore produces roughly 2,766 kg of CO₂ per passenger, based on the ICAO/EEA short-haul emission factor of ~0.255 kg per passenger-km. The London → Hong Kong flight emits about 2,454 kg. Choosing the shorter route saves approximately 312 kg of CO₂ per traveler — equivalent to 15 typical tree-years of carbon sequestration.
The London to Singapore route covers 10,848 km (6,741 miles), crossing from Europe to Asia. London (population: 8,982,000) is located in England, United Kingdom, while Singapore (population: 5,850,342) is in Singapore, Singapore.
The London to Hong Kong route covers 9,623 km (5,979 miles), spanning from Europe to Asia. London (population: 8,982,000) is in England, United Kingdom, and Hong Kong (population: 7,488,865) is in Hong Kong SAR, Hong Kong.
Flying from London to Singapore takes approximately 14h 4min, while London to Hong Kong takes 12h 32min.
Since both routes depart from London, this comparison is especially useful for travelers deciding between Singapore and Hong Kong as a destination.
The 1,225 km difference between these routes is relatively modest, so other factors like ticket prices and schedules may matter more.
Neither route has a road figure we can defend. SnapDistance does not publish a road-distance or driving-time figure for London to Singapore. Although the land is physically connected, a continuous drive would cross several international borders and long corridors where an ordinary road journey cannot be assumed, so a straight-line road estimate would not describe a usable route. SnapDistance does not publish a road-distance or driving-time figure for London to Hong Kong. Although the land is physically connected, a continuous drive would cross several international borders and long corridors where an ordinary road journey cannot be assumed, so a straight-line road estimate would not describe a usable route.
Singapore (Singapore) has a population of 5,850,342 and is located in the Singapore region of Asia. As a major metropolis, it offers extensive international connections and diverse attractions.
Hong Kong (Hong Kong) has a population of 7,488,865 and is situated in Hong Kong SAR, Asia. This major global city has multiple airports and world-class infrastructure.
Choose this route if your priority is reaching Singapore (Singapore) — a city of 5,850,342 in the Singapore region of Asia. Despite being the longer of the two at 10,848 km, it makes sense when Singapore itself is the destination, the schedule fits better, or ticket prices are noticeably lower. This is a fly-only route in practice — overland travel is not realistic at 10,848 km. The initial bearing is 78° (ENE), so a great-circle flight leaves London heading roughly ENE.
This route is the right call if you are heading to Hong Kong (Hong Kong) — a city of 7,488,865 in the Hong Kong SAR region of Asia. It is also the shorter of the two at 9,623 km, saving about 1h 32min of flying and around 312 kg of CO₂ per passenger. Overland travel is not practical for 9,623 km; flying is the realistic mode. Departing London, the great-circle bearing toward Hong Kong is 58° (ENE).
London (51.51°, -0.13°) → Singapore (1.35°, 103.82°): London keeps Europe/London time and Singapore keeps Asia/Singapore time — a gap of about 7 hours, with Singapore ahead. The exact gap moves when either zone switches to or from daylight saving, so use the live figure in the calculator for your travel dates. London (51.51°, -0.13°) → Hong Kong (22.32°, 114.17°): London keeps Europe/London time and Hong Kong keeps Asia/Hong_Kong time — a gap of about 7 hours, with Hong Kong ahead. The exact gap moves when either zone switches to or from daylight saving, so use the live figure in the calculator for your travel dates. Both gaps come from the cities' real IANA zones and move with daylight saving. Shifts of 5 hours or more typically produce noticeable jet lag — plan one recovery day per three time zones crossed.
Hong Kong is closer at 9,623 km, which is 1,225 km (11%) shorter.
10,848 km (6,741 miles). Flight: ~14h 4min.
9,623 km (5,979 miles). Flight: ~12h 32min.
Flying to Hong Kong is faster at ~12h 32min, saving about 1h 32min compared to Singapore.
All distances on SnapDistance are calculated using the Haversine formula, which determines the great-circle distance between two points on Earth's surface. This gives the shortest possible distance over the globe, which is the measurement used for aviation and navigation. Actual travel distances by road or rail are typically 20-40% longer due to terrain, borders, and infrastructure routing. Flight times assume 800 km/h cruising speed with 30 minutes for takeoff and landing. Driving estimates use 80 km/h average speed with a 30% road distance factor.