Book a trip from Seattle to Phnom Penh with Cathay Pacific , fares from USD846

PROMOTION CODE (OPTIONAL)

Fly Cathay Pacific from Seattle (SEA) to Phnom Penh (KTI). Enjoy award-winning service, entertainment, and an enhanced menu for Premium Economy and Business class during your flight. Book direct to secure our best fare and join as a Cathay member to earn Status Points or Miles.

When is the best time to fly from Seattle (SEA) to Phnom Penh (KTI)?

Try alternate month or interact with individual days below in order to find offers.
cmp-daily-histogram-bars-legend-min-price-aria-label USD936
Displaying fares for September-2026
  • SEA–KTI: cmp-view-offers-disclaimer. Find offers
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    OCT

  • SEA–KTI, 02/10/2026 – 21/10/2026: From USD983
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  • SEA–KTI, 03/10/2026 – 21/10/2026: From USD990
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  • SEA–KTI, 04/10/2026 – 21/10/2026: From USD1,035
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  • SEA–KTI, 05/10/2026 – 21/10/2026: From USD1,059
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  • SEA–KTI, 06/10/2026 – 19/10/2026: From USD1,112
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  • SEA–KTI, 07/10/2026 – 21/10/2026: From USD936
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  • SEA–KTI, 08/10/2026 – 19/10/2026: From USD1,010
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  • SEA–KTI, 09/10/2026 – 21/10/2026: From USD1,035
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  • RangeUSD936-USD1,112

    Travel Destination Facts

    Destination airport(s)
    • Phnom Penh International Airport (PNH)
    • Krong Ta Khmau Airport (KTI)
    Aircraft Type

    Boeing 777, Airbus A321neo, Airbus A330 and Airbus A350 aircraft*

    Departure time zone
    GMT-07:00
    Arrival time zone
    GMT+07:00
    Cabin Class

    First class, Business class, Premium Economy, Economy^

    Lowest fare month
    March

    Explore flight fares from Seattle (SEA) to Phnom Penh (KTI)

    Make flexible bookings with Cathay Pacific and enjoy hassle-free travel when plans change.

    USD
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    Explore flight fares from Seattle (SEA) to Phnom Penh (KTI)
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    To
    Fare Type
    Dates
    Price
    Seattle (SEA)Phnom Penh (KTI)Round-trip
    /
    Economy
    13/10/2026 - 19/10/2026

    From

    USD846

    Seen 21 hours ago

    Seattle (SEA)Phnom Penh (KTI)Round-trip
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    Economy
    14/10/2026 - 19/10/2026

    From

    USD884

    Seen 21 hours ago

    Seattle (SEA)Phnom Penh (KTI)Round-trip
    /
    Economy
    15/10/2026 - 19/10/2026

    From

    USD888

    Seen 21 hours ago

    Seattle (SEA)Phnom Penh (KTI)Round-trip
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    Economy
    12/10/2026 - 19/10/2026

    From

    USD888

    Seen 21 hours ago

    Seattle (SEA)Phnom Penh (KTI)Round-trip
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    Economy
    13/10/2026 - 21/10/2026

    From

    USD846

    Seen 1 day ago

    Seattle (SEA)Phnom Penh (KTI)Round-trip
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    Economy
    12/10/2026 - 21/10/2026

    From

    USD888

    Seen 1 day ago

    Seattle (SEA)Phnom Penh (KTI)Round-trip
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    Economy
    15/10/2026 - 21/10/2026

    From

    USD888

    Seen 1 day ago

    Seattle (SEA)Phnom Penh (KTI)Round-trip
    /
    Economy
    14/10/2026 - 21/10/2026

    From

    USD888

    Seen 1 day ago

    Seattle (SEA)Phnom Penh (KTI)Round-trip
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    Economy
    07/10/2026 - 21/10/2026

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    USD936

    Seen 1 day ago

    Seattle (SEA)Phnom Penh (KTI)Round-trip
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    Economy
    25/11/2026 - 11/12/2026

    From

    USD938

    Seen 1 day ago

    Lowest fares on round-trip flights found by other customers on Cathay Pacific’s official website in the last 48 hours. All fares are subject to change at any time. Other Cathay Pacific Terms & Conditions apply.

    Book Business Class flights to Phnom Penh - selected offers

    Experience refined comfort in our award-winning Business class.

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    Lowest fares on flights found by other customers on Cathay Pacific’s official website in the last 48 hours. All fares are subject to change at any time. Other Cathay Pacific Terms & Conditions apply.

    Flights from Seattle SEA to Phnom Penh KTI

    Phnom Penh, formerly known as the Paris of the East, has a chaotic edginess that blends with a charming elegance. Book your flight to Phnom Penh with Cathay Pacific and discover a city brimming with delights. Generous luggage allowances, large comfortable seats, and excellent inflight entertainment ensure you enjoy your Phnom Penh flight.

    Discover Phnom Penh

    Start at the National Museum of Cambodia for an understanding of this country’s complicated past and current growth. The Tuol Sleng Genocide Museum provides a harrowing look into Cambodia’s history. Take a trip to the nearby Killing Fields of Choeung Ek – a memorial containing hundreds of human bones honouring the deceased. Admire the opulent Royal Palace and Silver Pagoda, experience spirituality at Wats Phnom and Ounalom, stroll along the riverfront, and see traditional stilt houses at Tonle Bati. Shop for local goods and snacks at the Russian Market.

    Best time to visit Phnom Penh

    Temperatures are coolest between November and January, attracting the most visitors. March to May sees the hottest temperatures, the May to October wet season is warm and humid, and the most rainfall occurs between July and September. Whenever you visit, fly in comfort and style when you choose Cathay Pacific for your Phnom Penh flights.