Siem Reap, Cambodia → Bangkok, Thailand · ✈ 57 min · 🚗 5h 56min
197 nautical miles · Time difference: Same timezone · Direction: west
The distance from Siem Reap to Bangkok 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 Siem Reap, Cambodia to Bangkok, Thailand 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.
Bangkok is located west of Siem Reap. Siem Reap is in Asia, in the Siem Reap region of Cambodia, while Bangkok is in Asia, in Central, Thailand. 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 Siem Reap to Bangkok. 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 Siem Reap to Bangkok 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.
Siem Reap sits at 13.3633°N, 103.8564°E, while Bangkok is located at 13.7563°N, 100.5018°E. The initial compass bearing from Siem Reap to Bangkok is 277° (W), so a great-circle flight path leaves Siem Reap heading roughly W. 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 Siem Reap and Bangkok 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.
Siem Reap and Bangkok 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.
Siem Reap is a major city in Cambodia with a population of approximately 245,494. Located in the Siem Reap region, it is an important hub in Asia. Despite its smaller size, Siem Reap plays an important regional role in Cambodia and attracts visitors year-round.
Bangkok is a notable city in Thailand with a population of approximately 10,539,000. Situated in the Central region, it serves as a key destination in Asia. Bangkok is one of Thailand's largest cities, offering major airport hubs, extensive public transport, and a wide range of accommodation options.
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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 Siem Reap to Bangkok (365 km) is roughly equivalent to 9 marathon distances laid end to end.
Combined, Siem Reap and Bangkok have a population of over 10,784,494 people, making this a major urban corridor.
The straight-line distance from Siem Reap to Bangkok 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.
Bangkok is approximately Same timezone compared to Siem Reap.
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.