Book a trip from Boston to Phnom Penh with Cathay Pacific , fares from USD1,225

PROMOTION CODE (OPTIONAL)

Fly Cathay Pacific from Boston (BOS) 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 Boston (BOS) to Phnom Penh (KTI)?

cmp-daily-histogram-bars-legend-min-price-aria-label USD1.2K
cmp-daily-histogram-bars-legend-max-price-aria-label USD5.3K
Displaying fares for October-2026
  • BOS–KTI, 21/10/2026 – 09/04/2027: From USD5,265
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    OCT

  • BOS–KTI, 22/10/2026 – 04/11/2026: From USD1,225
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  • BOS–KTI, 23/10/2026 – 04/11/2026: From USD1,275
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  • BOS–KTI, 24/10/2026 – 04/11/2026: From USD1,275
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  • BOS–KTI, 25/10/2026 – 04/11/2026: From USD1,275
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  • BOS–KTI, 26/10/2026 – 16/11/2026: From USD1,225
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  • BOS–KTI, 27/10/2026 – 04/11/2026: From USD1,225
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  • BOS–KTI, 28/10/2026 – 16/11/2026: From USD1,225
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  • BOS–KTI, 29/10/2026 – 16/11/2026: From USD1,225
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  • BOS–KTI, 30/10/2026 – 23/11/2026: From USD1,275
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  • BOS–KTI, 31/10/2026 – 16/11/2026: From USD1,275
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  • BOS–KTI, 01/11/2026 – 16/11/2026: From USD1,275
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  • BOS–KTI, 02/11/2026 – 16/11/2026: From USD1,225
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  • BOS–KTI, 03/11/2026 – 17/11/2026: From USD1,225
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  • BOS–KTI, 04/11/2026 – 23/11/2026: From USD1,225
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  • BOS–KTI, 05/11/2026 – 23/11/2026: From USD1,225
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  • BOS–KTI, 06/11/2026 – 16/11/2026: From USD1,275
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  • BOS–KTI, 07/11/2026 – 24/11/2026: From USD1,338
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  • BOS–KTI, 08/11/2026 – 17/11/2026: From USD1,275
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  • BOS–KTI, 09/11/2026 – 24/11/2026: From USD1,225
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  • BOS–KTI, 10/11/2026 – 17/11/2026: From USD1,225
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  • BOS–KTI, 11/11/2026 – 24/11/2026: From USD1,225
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  • BOS–KTI, 12/11/2026 – 24/11/2026: From USD1,225
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  • BOS–KTI, 13/11/2026 – 17/11/2026: From USD1,275
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  • BOS–KTI, 14/11/2026 – 24/11/2026: From USD1,338
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  • BOS–KTI, 15/11/2026 – 24/11/2026: From USD1,275
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  • BOS–KTI, 16/11/2026 – 06/12/2026: From USD1,225
    16

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  • BOS–KTI, 17/11/2026 – 06/12/2026: From USD1,225
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  • BOS–KTI, 18/11/2026 – 06/12/2026: From USD1,225
    18

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  • BOS–KTI, 19/11/2026 – 06/12/2026: From USD1,386
    19

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  • BOS–KTI, 20/11/2026 – 06/12/2026: From USD2,449
    20

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  • RangeUSD1,225-USD5,265

    Travel Destination Facts

    Destination airport(s)
    • Phnom Penh International Airport (PNH)
    • Techo International Airport (KTI)
    Aircraft Type

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

    Departure time zone
    GMT-04:00
    Arrival time zone
    GMT+07:00
    Cabin Class

    First class, Business class, Premium Economy, Economy^

    Lowest fare month
    March

    Explore flight fares from Boston (BOS) to Phnom Penh (KTI)

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

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    Explore flight fares from Boston (BOS) to Phnom Penh (KTI)
    From
    To
    Fare Type
    Dates
    Price
    Boston (BOS)Phnom Penh (KTI)Round-trip
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    Economy
    26/10/2026 - 23/11/2026

    From

    USD1,225

    Seen 21 hours ago

    Boston (BOS)Phnom Penh (KTI)Round-trip
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    Economy
    29/10/2026 - 23/11/2026

    From

    USD1,225

    Seen 21 hours ago

    Boston (BOS)Phnom Penh (KTI)Round-trip
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    Economy
    16/11/2026 - 06/12/2026

    From

    USD1,225

    Seen 23 hours ago

    Boston (BOS)Phnom Penh (KTI)Round-trip
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    Economy
    17/11/2026 - 06/12/2026

    From

    USD1,225

    Seen 23 hours ago

    Boston (BOS)Phnom Penh (KTI)Round-trip
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    Economy
    23/11/2026 - 06/12/2026

    From

    USD1,225

    Seen 23 hours ago

    Boston (BOS)Phnom Penh (KTI)Round-trip
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    Economy
    03/11/2026 - 17/11/2026

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    USD1,225

    Seen 1 day ago

    Boston (BOS)Phnom Penh (KTI)Round-trip
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    Economy
    10/11/2026 - 17/11/2026

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    USD1,225

    Seen 1 day ago

    Boston (BOS)Phnom Penh (KTI)Round-trip
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    Economy
    12/11/2026 - 17/11/2026

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    USD1,225

    Seen 1 day ago

    Boston (BOS)Phnom Penh (KTI)Round-trip
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    Economy
    27/10/2026 - 16/11/2026

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    USD1,225

    Seen 1 day ago

    Boston (BOS)Phnom Penh (KTI)Round-trip
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    Economy
    28/10/2026 - 16/11/2026

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    USD1,225

    Seen 1 day ago

    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 are subject to regulatory approval.

    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 are subject to regulatory approval.

    Flights from Boston BOS 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.

    All fares displayed include taxes and carrier-imposed surcharges. All fares, government taxes and fees, and surcharges are subject to change at any time. For ticket cancellations, where applicable, the Hong Kong Passenger Security Charge, the Hong Kong Air Passenger Departure Tax, and the Hong Kong International Airport Construction Fee will be refunded without any administration fees.