There are currently four airlines flying from Bangkok to Siem Reap: Cambodia Angkor Air, Bangkok Airways, AirAsia and Thai Smile. Here are the highlights:
Cambodia Angkor Air currently operates four weekly flights to Siem Reap from Bangkok (and some more during high season) with the prices starting around $58 one-way. Flying from the main BKK airport, they offer 20 kilograms of baggage. Even though flights are sometimes delayed or rescheduled, they are semi-reliable. Head to Cambodia Angkor Air’s website to check prices as its flights do not show up on flight aggregators like Kayak or Google Flights.
Flying from the main Bangkok airport to Siem Reap in smaller propeller planes, Bangkok Airways flights start at around $88. If you sign up with their frequent flyer club they, will automatically give you an extra 10kg though they offer only a 20 kg baggage allowance. All passengers using services of Bangkok Airways get access to their private lounge with non-alcoholic drinks, snacks and free WiFi. Travel to Cambodia
Starting at $48 one-way, AirAsia usually offers the cheapest tickets from Bangkok to Siem Reap. However, not included, baggage even costs an extra 515 THB ($14.50 USD). Flying from Don Muang Airport rather than the main Bangkok Airport, flights are regularly delayed by 30-90 minutes.
An LCC owned by Thai Airways, Thai Smile fly from Bangkok Suvarnabhumi Airport with 20 kg of luggage included in tickets. For a one-way flight from Bangkok to Siem Reap, ticket prices start at $64. Buy tickets directly from their site as tickets on Thai Smile are much cheaper on their website than on flight aggregators. Thai Airways also sell Thai Smile tickets at inflated prices.
Traveling by bus from Bangkok
The direct buses from Bangkok to Siem Reap, mini-buses or by taxi are the best options for overland travel.
The direct bus is the easiest option if you are on a budget and do not want to take a taxi. It costs $26 for a bus ride from Bangkok to Siem Reap and it is possible to purchase tickets online. Although there are many companies claiming to have a direct bus, Transport Co./Nattakan which is run by the Thai government and has permission to use the same bus for the whole trip between Thailand and Vietnam, which means you do not have to haul your baggage over the border is the only one that actually does. It takes around 8 or 9 hours for the whole trip.
Even though traveling by mini-bus is the cheapest way to get from Bangkok, it is more hassle than the direct bus. Leaving from Mo Chit 2, also sometimes known as Northern terminal in Bangkok, mini-buses depart every 30 – 45 minutes from very early in the morning till it gets dark. But it is good to note that the Cambodia border closes at 10PM. Mini-buses, which are usually quite crowded, take about four hours to reach the border. It costs around 200 baht ($6 USD) to the border. Then, you will have to go across the border and get on another mini-bus to go to Siem Reap. Head straight through to the roundabout on the Cambodia’s side and look for a bus that is already occupied by passengers. It costs $8-10 from the Poipet border to Siem Reap and your trip may included some waiting around until the bus fills up.
Traveling by taxi
For those who want to travel by taxi, it is a must to take two taxis — one taxi from Bangkok to the Cambodia’s border and another from this border to go to Siem Reap. A 3.5-hour taxi ride from Bangkok to the border expects to cost between 2,100 and 2,500 Thai baht ($60-70 USD). Then, you have to go across the border on foot, and then get on another taxi to Siem Reap. It may cost you around $35, but sometimes as much as $55 for a taxi from Poipet to Siem Reap.
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