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Phnom Penh

Cheap flights from Washington to Phnom Penh (PNH)

SEA — PNH
Mar 7 — Mar 141
Sat 3/7
Sat 3/14
1 adult, Economy
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Find flight deals from Washington to Phnom Penh

Keep the following information in mind while searching for Washington to Phnom Penh flight deals. Data was last updated February 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

June

Cheapest in

January

Average price

$925
Provider with most accurate pricing for Seattle/Tacoma Intl-Phnom Penh Pochentong flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Phnom Penh Pochentong flights.
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Highest demand for flights based on searches. 18% potential increase in price ($241 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in February 2026
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Cheapflights Insights

Everything you need to know about your flight from Washington to Phnom Penh

What is the cheapest month to book a flight from State of Washington to Phnom Penh?

Currently, November is the cheapest month in which you can book a flight from State of Washington to Phnom Penh (average of $364). Flying from State of Washington to Phnom Penh in July is currently the most expensive (average of $928). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Washington to Phnom Penh. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Phnom Penh from Washington?

    Located just 5.0 mi from the city center, Phnom Penh Pochentong (PNH) is the airport most travelers will use when flying to Phnom Penh from Washington.

  • What are the cheapest airlines to fly from State of Washington to Phnom Penh one-way?

    For one-way options, check prices for China Airlines. According to our data, you can fly for as low as $389. Users have also found prices from $397 and $413 on Korean Air and Asiana Airlines, respectively.

  • What are the most popular routes from State of Washington to Phnom Penh?

    The most popular route from State of Washington to Phnom Penh is Seattle/Tacoma Intl - Phnom Penh Pochentong. You may also consider Spokane - Phnom Penh Pochentong or Portland - Phnom Penh Pochentong.

  • Can I find deals for flights from Washington to Phnom Penh that include hotel bookings?

    Yes. In addition to deals on Washington to Phnom Penh flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Phnom Penh?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Phnom Penh.

  • Can I find deals for business class flights from Washington to Phnom Penh?

    Yes. Cheapflights offers flight deals from Washington to Phnom Penh by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from State of Washington to Phnom Penh?

    Currently, November is the cheapest month in which you can book a flight from State of Washington to Phnom Penh (average of $364). Flying from State of Washington to Phnom Penh in July is currently the most expensive (average of $928). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Washington to Phnom Penh

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Top 6 airlines flying from Washington to Phnom Penh

Discover the top 6 airlines that operate flights from Washington to Phnom Penh. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest$693Average$925FlexibilityNo cancel feeOn-time60%
Singapore AirlinesCheapest$702Average$1,038FlexibilityNo cancel feeOn-time81%
Korean AirCheapest$756Average$1,009FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$773Average$1,064FlexibilityNo cancel feeOn-time76%
EVA AirCheapest$895Average$1,383FlexibilityNo cancel feeOn-time74%
China AirlinesCheapest$995Average$1,382FlexibilityNo cancel feeOn-time70%

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