Presently, one can obtain a visa-on-arrival in Cambodia for US$30. You can fill out the application forms handed out to you on the plane, or at the airport or border crossings.
Provide one passport photograph and US$30
The e-visa may be applied for online. You need a credit card for payment (US$37) and need to upload one recent photgraph.Here is the official government site
On the website you will see at which border crossings/entry points the e-visa is valid, and which nationalities are not supported for the e-visa (who need to apply for the visa at embassies)
Note: Cambodia uses USD. There’s no real need to carry the local currency, Cambodian Riels (KHR), unless you paying for really small things on the street, but for the most part, use USD.
Siem Reap has one airport receiving international flights:
Siem Reap International Airport
The Siem Reap International Airport is only 5 kilometers or 15 minutes to town center.
There are always taxis, tuk-tuks and motodups awaiting and available for arriving passengers.
Local buses are available from the bus station to travel to the different tourist spots in Siem Reap. However, buses stop only at the bus station and from there you need to take tuk-tuks, and therefore, buses are not the preferred mode of transportation.
Taxi Meter is available in Phnom Penh and Siem Reap now.
Uber ride-hailling apps – Uber accepted cash and credit card payment.
Choice Taxi (Yellow) – Phone: 023 888 023, 010 888 010
Global Taxi (White) – Phone: 023 222 688, 010 311 888
The taxi costs from 5$-10$ from the 20-50 minutes
Tuk-tuks and motorbike taxis can be found on every corner in the big cities, usually not more than $5 USD depending on the distance.
Many hotels and guesthouses include free use of bicycles in their room rate. Or you can rent a bicycle in bike shops throughout town, renting a bicycle should cost around $2-$5 USD per day.
Local train services are not available in Siem Reap.