The following TripReport snippet is taken from 2003/12 Merlin - Spending the Holidays In Cambodia

Airline Tix
I booked my flight from Bkk, Siem Reap, PP, BKK for 12,020 baht on Bangkokair.com. This is a bit pricier than the competing Cambodia airlines (Presidente?) but well worth it IMHO because Bangkok Air is a class act. -- very efficient, newer planes and good pilots . There were no, to little, flights to Sihanoukville from anywhere, so I decided to travel there by car from PP.

If you want to have a travel agent to do all your planning, I highly recommend the following outfit which I have used numerous times with great satisfication.

Thailand Tourist Service (Dynasty Inn) ttstrav@ksc.th.com Tel. 6767507
They have a satellite office at the Dynasty, and their main office is on Soi 4 about 100 meters from Dynasty Inn (same side).

Important Photos & Visa Application (info taken from my last trip).

Remember that you will need a few passport sized photos to obtain the VISA and to obtain a photo ID pass to see all the ruins. The best place I found was at the Kodak Zoom Photo center right in the heart of NANA, next to the convenience store, and across from NANA Hotel, on Soi 4. They took 4 photos of me for 200 baht and did it in less than 10 minutes!

The Cambodian VISA applications are available at the Bangkok Airways terminal in BKK. Fill it out on the plane or in the waiting area.

Flight to Siem Reap
Remember that Bangkokair has two terminals, international and domestic. Obviously, the terminal you want is international. Some taxi guys didn't know this. The airport tax is 500 baht when you leave.

The planes they use to Siem Reap are the newer ATR 72 (turbo prop plane), whereas the flights to PP from BKK are with their newer Boeing 707 planes. All the planes were relatrively new and the flights and pilots were top notch. I fly alot for a living and can gauge the competency of the pilots by take off and landing. Bangkok air has some good pilots. Flight safety should be a concern in the third world countries b/c you certainly don't want mediocore maintenance, bad pilots, or older, hand-me-down planes that can barely take off. As a point of digression, Mexicana and Korean Air are the worst IMHO, frequent "Pancake" landings and awkward takeoffs occassionally. Thai Airways is very good, as are most U.S. carriers. But, as you know, no U.S. carrier flies to Cambodia. Eva Air and Korean have flights from Taipei and Seoul, respectively, but only 2 or 3 times a week.