I decided to take the train from Bangkok to the Thai-Cambodian border and then onwards by bus, but then changed my mind because I didn’t feel like dealing with the scams going on at the border. Instead I booked a flight with Air Asia which uses Don Mueang Airport, one of the two airports serving Bangkok.
I considered taking the train from Hua Lamphong Station to Don Muang Railway Station, which is opposite the airport and linked by pedestrian bridge. This time I was afraid of train delays, which is quite common and instead arranged a taxi through my accommodation because I had to be at the airport really early. Taxi was 500 baht. A bit expensive, but I had peace of mind.
Arriving in a humid Siem Reap to a small, beautiful modern airport.
Certain nationalities qualify for visa-on-arrival, which is $30 at present, they need 1 passport photo and your application form.
My accommodation provided an airport pick-up .