Bangkok, Thailand → Siem Reap, Cambodia · ✈ 57 min · 🚗 5h 56min
197 nautical miles · Time difference: Same timezone · Direction: east
The distance from Bangkok to Siem Reap is 365 km (227 miles). The fastest way to travel is by flight. A direct flight takes approximately 57 min.
The straight-line distance from Bangkok, Thailand to Siem Reap, Cambodia is approximately 365 kilometers (227 miles or 197 nautical miles). This measurement uses the Haversine formula, computing the great-circle distance — the shortest path between two points on Earth's surface.
Siem Reap is located east of Bangkok. Bangkok is in Asia, in the Central region of Thailand, while Siem Reap is in Asia, in Siem Reap, Cambodia. Both cities are in Asia.
| Mode | Distance | Est. Time | Best For |
|---|---|---|---|
| ✈️ Flight | 365 km | ~57 min | Quick but may not save time with airport procedures |
| 🚗 Drive | ~475 km | ~5h 56min | Convenient and flexible |
| 🚂 Regular Train | ~438 km | ~3h 39min | Budget-friendly option |
Our recommendation: flight is typically the best way to travel from Bangkok to Siem Reap. At this distance, driving gives you the most flexibility and avoids airport overhead.
Based on an estimated road distance of 475 km, fuel costs for driving from Bangkok to Siem Reap are approximately $38–$71 USD (at $0.08–$0.15 per km, depending on vehicle efficiency and local fuel prices). Additional costs may include tolls, parking, and accommodation for longer trips.
Bangkok sits at 13.7563°N, 100.5018°E, while Siem Reap is located at 13.3633°N, 103.8564°E. The initial compass bearing from Bangkok to Siem Reap is 96° (E), so a great-circle flight path leaves Bangkok heading roughly E. Because the Earth is curved, the actual heading shifts gradually along the route — pilots and navigation systems update it continuously instead of holding a single fixed compass bearing.
The latitude difference is 0.39° and the longitude difference is 3.35°. Each degree of latitude represents about 111 km, which is one reason cross-latitude routes feel longer even when the map looks similar to east–west journeys.
The geographic midpoint between Bangkok and Siem Reap is approximately 13.5654°N, 102.1805°E. This is the great-circle halfway position — the spot where you would be exactly 183 km from each city. For road trips, a stop near this latitude/longitude makes for a natural overnight or lunch break.
Bangkok and Siem Reap share the same approximate time zone, so meetings, calls, and arrivals don't require any clock adjustment. This makes the route especially convenient for short business trips. Daylight saving time can shift the offset by an hour during certain months, so confirm the exact difference for your specific travel dates.
Bangkok is a major city in Thailand with a population of approximately 10,539,000. Located in the Central region, it is an important hub in Asia. As one of the largest cities in Thailand, Bangkok is a major international gateway with extensive air connections and multiple airports.
→ See all distances from Bangkok
Siem Reap is a notable city in Cambodia with a population of approximately 245,494. Situated in the Siem Reap region, it serves as a key destination in Asia. Siem Reap is a popular destination in the Siem Reap region of Cambodia, known for its unique character and attractions.
365 km is a medium-distance route, similar to traveling across a mid-sized European country. A flight covers this distance quickly, but driving or rail travel remains feasible for those who prefer ground transport. For reference, New York to Chicago is about 1,150 km.
The distance from Bangkok to Siem Reap (365 km) is roughly equivalent to 9 marathon distances laid end to end.
Combined, Bangkok and Siem Reap have a population of over 10,784,494 people, making this a major urban corridor.
The straight-line distance from Bangkok to Siem Reap is approximately 365 kilometers (227 miles, 197 nautical miles).
A direct flight takes approximately 57 min, based on 800 km/h cruising speed plus 30 minutes for takeoff and landing.
Estimated driving time is approximately 5h 56min, based on 80 km/h average speed and roads being ~30% longer than straight-line distance.
Siem Reap is approximately Same timezone compared to Bangkok.
The estimated road distance is approximately 475 km, which is about 30% longer than the 365 km straight-line distance.
📍 Data: Coordinates from OpenStreetMap contributors. Distances calculated using the Haversine formula. Travel times are estimates only. Last verified: April 21, 2026.