The cheapest times to fly from IAD to PNH are
- January 8th to April 1st
- September 3rd to December 9th (except the week of September 17th)
based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from IAD to PNH is mid October. Prices can be as high as $2426 for Saturday flights during early to mid June, or as low as $689 for Tuesday flights around mid October.
When to Fly to Phnom Penh
Flying from Washington, DC (IAD) to Phnom Penh (PNH) will usually cost between $876 to $1868 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid October with an average ticket price of $911. Due to high demand the most expensive time to fly is early to mid June, with an average price of $1840. Planning your trip to low-cost times can easily save you $929 on economy flights and even more on first-class flights. Generally, any price below $1080 can be considered a good price for a round-trip IAD to PNH flight.
See below for a graph of average weekly prices for the IAD to PNH route. All prices are for round-trip tickets in USD.
Compared to other flights, the IAD to PNH flight is priced close to the average and costs about as much as the average flight leaving from Washington. The average price per mile (for a direct flight) is $0.08, which is far below average.
Flight Prices by Day of the Week
Tuesday is usually the cheapest day to depart and return on this flight. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $227 (13%) on this flight.
Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1116. Return trip prices are from the PNH to IAD flight, and often highlight the quality of our data in showing the same trend.
Departing Prices by Day
Return Trip Prices by Day
Nonstop Flights and Layovers
Travelers looking to fly from IAD to PNH can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 17 hour 5 minutes may not be realistic.
Alternative Nearby Airports
Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from IAD to PNH while comparing.
- 132 miles (212 km) away from PNH
- Usually 22.51% less expensive than PNH
- 1-layover flights available
Flight Hacking IAD to PNH
Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from IAD to PNH — but Champion Traveler does!
- Price for both tickets: $981
- Average savings: $99 (9.17%)
- Price for both tickets: $1051
- Average savings: $29 (2.69%)
- Price for both tickets: $1054
- Average savings: $26 (2.41%)
Flight Questions Answered
Still have questions about flying from IAD to PNH? We’ve got answers.
Which airlines fly this route?
You can find 33 major airlines flying this route most often: Aeroflot, Air Canada, Air China, Air France, Alaska, American, ANA, Asiana, Austrian, Bangkok Airways, British Airways, Brussels Airlines, Cathay Dragon, Cathay Pacific, China Airlines, China Eastern, China Southern, Delta, Emirates, Ethiopian, Etihad, EVA Air, Fiji Airways, KLM, Korean Air, Lufthansa, Qantas, Qatar Airways, Singapore Airlines, THAI, United, Vietnam Airlines, Xiamen, and potentially more during busy seasons.
How far away is it from Phnom Penh International Airport to Washington Dulles International Airport?
The distance between the two airports is roughly 8943 miles or 14392 kilometers.
How long does it take to fly from IAD to PNH?
The real-world flight time for a nonstop IAD to PNH flight is about 17 hour 5 minutes.
How many flights go between Washington, DC and Phnom Penh?
It depends on the day of the week and the date, but a typical day might have around 69 available flights from IAD to PNH.
Airport Location Info
|Origination airport name||Washington Dulles International Airport|
|Country||the United States|
|Destination airport name||Phnom Penh International Airport|
Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.