IAD - KTI

Find cheap flights from Washington Dulles Airport to Phnom Penh - Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Nonstop flights
Not available
There are currently no direct flights between Washington, D.C. Dulles Intl Airport and Phnom Penh. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
15 weeks
in advance
Our data shows that travelers who book at least 15 weeks in advance save around 32% compared to booking last minute.
Insights
Insights
When to travel
March
Cheapest • 13% price drop
December
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Abu Dhabi Zayed Intl (AUH)
Cheapest • Avg $1,296 (round-trip)
Taipei City Taiwan Taoyuan Intl (TPE)
Shortest trip • 21h 42m (one-way)
Insights
Insights
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Phnom Penh!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Dulles Intl to Phnom Penh (IAD-KTI)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Dulles Intl to Phnom Penh

Multiple Airlines Logo
IAD  Washington Dulles Airport-KTI Phnom Penh Techo Intl
8951 mimulti-stop
Multiple Airlines Logo
KTI  Phnom Penh Techo Intl-IAD Washington Dulles Airport
8951 mimulti-stop
Multiple Airlines
Booking Insights

Price, demand and travel trends for Washington, D.C. Dulles Intl Airport to Phnom Penh flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Washington, D.C. Dulles Intl Airport to Phnom Penh with more confidence.

What's the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to Phnom Penh?

Tuesday is the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to Phnom Penh, it is 12% cheaper than the average day. Monday is the most expensive day with flight prices 20% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Phnom Penh?

  • March is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Phnom Penh at $1,179 round-trip.
  • June ($1,988) and July ($1,602) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 68% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from Washington, D.C. Dulles Intl Airport to Phnom Penh the cheapest?

Flights from Washington, D.C. Dulles Intl Airport to Phnom Penh are cheapest 15 weeks before departure. Booking in this window typically costs about 32% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Find deals

Key details for Washington, D.C. Dulles Intl Airport to Phnom Penh flights

Low season

May
Best time to beat the crowds but there is an average 8% increase in price.
Most popular time to fly with an average 10% increase in price.

When to book flights from Dulles Intl to Phnom Penh

Are your dates flexible? Find out the best times to travel from Dulles Intl to Phnom Penh based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Washington, D.C. Dulles Intl Airport to Phnom Penh flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airports can I use when flying from Washington, D.C. Dulles Intl Airport to Phnom Penh?

    Flights from Washington, D.C. Dulles Intl Airport to Phnom Penh usually depart from Washington, D.C. Dulles Intl (IAD) and arrive at Phnom Penh Techo Intl (KTI).

  • What cabin classes can I book on flights from Washington, D.C. Dulles Intl Airport to Phnom Penh?

    Only Economy Class is available on flights from Washington, D.C. Dulles Intl Airport to Phnom Penh.

  • Which airports do connecting flights from Washington, D.C. Dulles Intl Airport to Phnom Penh pass through?

    One-stop flights from Washington, D.C. Dulles Intl Airport to Phnom Penh most commonly connect through:

    • Incheon Intl (ICN) - 56% of one-stop connections
    • Abu Dhabi Zayed Intl (AUH) - 24% of one-stop connections
    • Taipei City Taiwan Taoyuan Intl (TPE) - 21% of one-stop connections

    Incheon Intl (ICN) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from Washington, D.C. Dulles Intl Airport to Phnom Penh?

    Yes. Being flexible with your travel dates can save you up to 27% on the Washington, D.C. Dulles Intl Airport to Phnom Penh route. Tuesday is the cheapest departure day at $1,202 round-trip on average, while Monday is the most expensive at $1,631, a difference of $429. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How long is a flight from Washington, D.C. Dulles Intl Airport to Phnom Penh?

    A nonstop flight from Washington, D.C. Dulles Intl Airport to Phnom Penh takes 0h 00m, covering 8,951 miles.

  • What are the earliest and latest flights from Washington, D.C. Dulles Intl Airport to Phnom Penh?

    These are the earliest and latest flight times available from Washington, D.C. Dulles Intl Airport to Phnom Penh:

    • Earliest: departs at 12:00 am and lands at 12:00 am
    • Latest: departs at 12:00 am and lands at 12:00 am.

    The flight takes about 0h 00m.

  • How expensive are last-minute Washington, D.C. Dulles Intl Airport to Phnom Penh flights?

    Last-minute fares on this route - booked within 2 weeks of departure - run 23% above the route average of $1,355. Book 15 weeks before departure for the lowest fares.

  • Do I need a passport to fly from Washington, D.C. Dulles Intl Airport to Phnom Penh?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much time can I save by choosing a different layover airport from Washington, D.C. Dulles Intl Airport to Phnom Penh?

    Flying via Taipei City Taiwan Taoyuan Intl (TPE) gives the shortest average 1-stop total travel time at 21h 42m, compared with 22h 17m via Incheon Intl (ICN) and 31h 55m via Abu Dhabi Zayed Intl (AUH).

  • What is the time difference between Washington, D.C. Dulles Intl Airport and Phnom Penh?

    Phnom Penh is 11 hours ahead of Washington, D.C. Dulles Intl Airport (Indochina Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

  • How much should I expect to pay for a Washington, D.C. Dulles Intl Airport to Phnom Penh flight?

    Round-trip flights from Washington, D.C. Dulles Intl Airport to Phnom Penh range from $1,175 to $1,653, with an average of $1,355 over the past 12 months. Anything below $1,175 counts as a good deal.

Your guide to booking Washington, D.C. Dulles Intl Airport to Phnom Penh flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Tuesday departure instead of Monday. On this route, Tuesday flights average $1,202 - about $429 less than Monday (26% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 15 weeks before you fly. On this route, that window historically saves about 32% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Washington, D.C. Dulles Intl Airport to Phnom Penh trip for March. Fares historically average $1,179 round-trip in that month - typically $809 less than the most expensive month, which is June (based on the last 12 months).

Everything you need to know for your flight from Dulles Intl to Phnom Penh

Information on your arrival and departure airports

Washington Dulles Airport (IAD)
Phnom Penh (KTI)