Compare: Bangkok→Tokyo (4,599 km) vs Bangkok→Hong Kong (1,729 km). Bangkok → Hong Kong wins by 2,870 km (62%). Side-by-side with flight & drive times.
By SnapDistance Team · Updated April 21, 2026
4,599 km
2,858 miles · Flight: ~6h 15min · Drive: ~74h 44min
1,729 km
1,074 miles · Flight: ~2h 40min · Drive: ~28h 6min
✓ Shorter route
Difference: 2,870 km (62%) · Flight time difference: ~3h 35min
Verdict
Bangkok → Hong Kong is the smarter pick if travel time and emissions matter most: it is 2,870 km (62%) shorter, saves about 3h 35min of flight time, and cuts roughly 732 kg of CO₂ per passenger. Choose Bangkok → Tokyo only if the destination itself is the reason for the trip.
Bangkok → Hong Kong is the shorter route at 1,729 km, which is 2,870 km (62%) shorter than Bangkok → Tokyo. You would save approximately 3h 35min in flight time by choosing the shorter route.
| Metric | Bangkok → Tokyo | Bangkok → Hong Kong |
|---|---|---|
| Distance (km) | 4,599 | 1,729 |
| Distance (miles) | 2,858 | 1,074 |
| Flight time | ~6h 15min | ~2h 40min |
| Driving time | ~74h 44min | ~28h 6min |
| Road distance (est.) | ~5,979 km | ~2,248 km |
| Drivable? | No | Yes |
| Cross-continental | No | No |
| Initial bearing | 51° (NE) | 55° (NE) |
| Time-zone shift | +2h | +1h |
| CO₂ – flight (per pax) | ~1,173 kg | ~441 kg |
| CO₂ – driving (per car) | — | ~384 kg |
| Fuel cost (est.) | — | ~$225 USD |
Flying from Bangkok to Tokyo produces roughly 1,173 kg of CO₂ per passenger, based on the ICAO/EEA short-haul emission factor of ~0.255 kg per passenger-km. The Bangkok → Hong Kong flight emits about 441 kg. Choosing the shorter route saves approximately 732 kg of CO₂ per traveler — equivalent to 35 typical tree-years of carbon sequestration.
The Bangkok to Tokyo route covers 4,599 km (2,858 miles), staying within Asia. Bangkok (population: 10,539,000) is located in Central, Thailand, while Tokyo (population: 13,960,000) is in Kanto, Japan.
The Bangkok to Hong Kong route covers 1,729 km (1,074 miles), remaining within Asia. Bangkok (population: 10,539,000) is in Central, Thailand, and Hong Kong (population: 7,488,865) is in Hong Kong SAR, Hong Kong.
Flying from Bangkok to Tokyo takes approximately 6h 15min, while Bangkok to Hong Kong takes 2h 40min. If driving is an option, expect roughly 74h 44min for the first route and 28h 6min for the second.
Since both routes depart from Bangkok, this comparison is especially useful for travelers deciding between Tokyo and Hong Kong as a destination.
The 2,870 km difference between these routes is substantial and will significantly impact travel time and cost.
Only the Bangkok→Hong Kong route is practical by car (2,248 km by road). The other route requires flying.
Tokyo (Japan) has a population of 13,960,000 and is located in the Kanto 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 Tokyo (Japan) — a city of 13,960,000 in the Kanto region of Asia. Despite being the longer of the two at 4,599 km, it makes sense when Tokyo 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 4,599 km. The initial bearing is 51° (NE), so a great-circle flight leaves Bangkok heading roughly NE.
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 1,729 km, saving about 3h 35min of flying and around 732 kg of CO₂ per passenger. Driving is feasible — expect roughly 2,248 km of road and a fuel cost in the $225 USD range. Departing Bangkok, the great-circle bearing toward Hong Kong is 55° (NE).
Bangkok (13.76°, 100.50°) and Tokyo (35.68°, 139.65°) sit with a time-zone shift of +2 hours. Bangkok (13.76°, 100.50°) and Hong Kong (22.32°, 114.17°) have a +1-hour offset. Both routes have manageable time-zone shifts, so jet lag should not be a major factor.
Hong Kong is closer at 1,729 km, which is 2,870 km (62%) shorter.
4,599 km (2,858 miles). Flight: ~6h 15min.
1,729 km (1,074 miles). Flight: ~2h 40min.
Flying to Hong Kong is faster at ~2h 40min, saving about 3h 35min compared to Tokyo.
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.
📍 Data: Coordinates from OpenStreetMap contributors. Distances calculated using the Haversine formula. Travel times are estimates only. Last verified: April 21, 2026.