Cheap flights from Washington to Siem Reap from $270

When did momondo last update prices for flights from Washington to Siem Reap?

Prices for flights from Washington to Siem Reap are refreshed on a daily basis.

How many operators does momondo search for flights from Washington to Siem Reap?

As of March 2026, there is 1 operator available to choose from for flights from Washington to Siem Reap.

How old do you have to be to fly from Washington to Siem Reap?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to Siem Reap.

What documentation or ID do you need to fly to Siem Reap?

The travel and health documents required for your trip to Siem Reap can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Siem Reap. We always recommend checking with your airline or a trusted third party such as IATA to get advice.