For tourists from the US, Canada, UK, Australia, and most EU countries:

• Visa on Arrival: Kindly prepare $30 USD for a 30-day stay (extendable by 30 days), available at major airports and land borders. Please bring a passport valid for 6+ months and one photo.
• e-Visa: For your convenience, apply online at www.evisa.gov.kh for $36 USD. It’s valid for 3 months, granting a 30-day stay at key entry points. The same passport and photo requirements apply.
• Embassy: You’re welcome to obtain it in advance for $30–$35 USD, offering a 30-day stay.
• e-Arrival Card: Please submit this free form online at www.arrival.gov.kh within 7 days before flying into major airports.

The dry season from mid-October to April is the best time for outings in Cambodia due to its mild air, clear blue skies, and minimal rainfall. From May to September, even though it's the rainy season, the rain typically only lasts for an hour or two a day. The rest of the day is usually sunny, and visits are still feasible.

Yes, it is entirely possible to reach Cambodia by air. You can take a flight from Ho Chi Minh (or Hanoi) to Siem Reap and spend the rest of your journey exploring the magnificent Angkorian temples.