Compare: Seoul→Singapore (4,672 km) vs Seoul→Bangkok (3,722 km). Seoul → Bangkok wins by 950 km (20%). Side-by-side with flight & drive times.
By SnapDistance Team · Updated April 21, 2026
4,672 km
2,903 miles · Flight: ~6h 20min · Drive: ~75h 55min
3,722 km
2,313 miles · Flight: ~5h 9min · Drive: ~60h 29min
✓ Shorter route
Difference: 950 km (20%) · Flight time difference: ~1h 11min
Verdict
Seoul → Bangkok is the smarter pick if travel time and emissions matter most: it is 950 km (20%) shorter, saves about 1h 11min of flight time, and cuts roughly 242 kg of CO₂ per passenger. Choose Seoul → Singapore only if the destination itself is the reason for the trip.
Seoul → Bangkok is the shorter route at 3,722 km, which is 950 km (20%) shorter than Seoul → Singapore. You would save approximately 1h 11min in flight time by choosing the shorter route.
| Metric | Seoul → Singapore | Seoul → Bangkok |
|---|---|---|
| Distance (km) | 4,672 | 3,722 |
| Distance (miles) | 2,903 | 2,313 |
| Flight time | ~6h 20min | ~5h 9min |
| Driving time | ~75h 55min | ~60h 29min |
| Road distance (est.) | ~6,074 km | ~4,839 km |
| Drivable? | No | Yes |
| Cross-continental | No | No |
| Initial bearing | 216° (SW) | 232° (SW) |
| Time-zone shift | -1h | -1h |
| CO₂ – flight (per pax) | ~1,191 kg | ~949 kg |
| CO₂ – driving (per car) | — | ~827 kg |
| Fuel cost (est.) | — | ~$484 USD |
Flying from Seoul to Singapore produces roughly 1,191 kg of CO₂ per passenger, based on the ICAO/EEA short-haul emission factor of ~0.255 kg per passenger-km. The Seoul → Bangkok flight emits about 949 kg. Choosing the shorter route saves approximately 242 kg of CO₂ per traveler — equivalent to 12 typical tree-years of carbon sequestration.
The Seoul to Singapore route covers 4,672 km (2,903 miles), staying within Asia. Seoul (population: 9,776,000) is located in Capital Area, South Korea, while Singapore (population: 5,850,342) is in Singapore, Singapore.
The Seoul to Bangkok route covers 3,722 km (2,313 miles), remaining within Asia. Seoul (population: 9,776,000) is in Capital Area, South Korea, and Bangkok (population: 10,539,000) is in Central, Thailand.
Flying from Seoul to Singapore takes approximately 6h 20min, while Seoul to Bangkok takes 5h 9min. If driving is an option, expect roughly 75h 55min for the first route and 60h 29min for the second.
Since both routes depart from Seoul, this comparison is especially useful for travelers deciding between Singapore and Bangkok as a destination.
The 950 km difference between these routes is noticeable in both travel time and fuel or ticket costs.
Only the Seoul→Bangkok route is practical by car (4,839 km by road). The other route requires flying.
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.
Bangkok (Thailand) has a population of 10,539,000 and is situated in Central, 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 4,672 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 4,672 km. The initial bearing is 216° (SW), so a great-circle flight leaves Seoul heading roughly SW.
This route is the right call if you are heading to Bangkok (Thailand) — a city of 10,539,000 in the Central region of Asia. It is also the shorter of the two at 3,722 km, saving about 1h 11min of flying and around 242 kg of CO₂ per passenger. Driving is feasible — expect roughly 4,839 km of road and a fuel cost in the $484 USD range. Departing Seoul, the great-circle bearing toward Bangkok is 232° (SW).
Seoul (37.57°, 126.98°) and Singapore (1.35°, 103.82°) sit with a time-zone shift of -1 hour. Seoul (37.57°, 126.98°) and Bangkok (13.76°, 100.50°) have a -1-hour offset. Both routes have manageable time-zone shifts, so jet lag should not be a major factor.
Bangkok is closer at 3,722 km, which is 950 km (20%) shorter.
4,672 km (2,903 miles). Flight: ~6h 20min.
3,722 km (2,313 miles). Flight: ~5h 9min.
Flying to Bangkok is faster at ~5h 9min, saving about 1h 11min 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.
📍 Data: Coordinates from OpenStreetMap contributors. Distances calculated using the Haversine formula. Travel times are estimates only. Last verified: April 21, 2026.