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Flights from Seattle to Phnom Penh

Find flight deals from Seattle to Phnom Penh for the next 3 months. Book one way flights from $369 or round trip flights from $907.

      • SEA 11:10 PM
        34h 35m
        1 stop
        KTI 11:45 PM
        Seattle - Phnom Penh | Tue, Sep 1 | Philippine Airlines
        KTI 11:35 PM
        25h 5m
        1 stop
        SEA 10:40 AM
        Phnom Penh - Seattle | Wed, Sep 9 | Korean Air
        $907 $1,531
        41% off
        41% off
        $1,531 $907
      • SEA 12:50 PM
        19h 25m
        1 stop
        KTI 10:15 PM
        Seattle - Phnom Penh | Tue, Sep 1 | Korean Air
        KTI 11:35 PM
        25h 5m
        1 stop
        SEA 10:40 AM
        Phnom Penh - Seattle | Wed, Sep 9 | Korean Air
        $943 $1,531
        38% off
        38% off
        $1,531 $943
      • SEA 12:10 AM
        32h 15m
        1 stop
        KTI 10:25 PM
        Seattle - Phnom Penh | Mon, Sep 7 | Asiana Airlines
        KTI 11:25 PM
        29h 50m
        1 stop
        SEA 3:15 PM
        Phnom Penh - Seattle | Mon, Sep 14 | Asiana Airlines
        $954 $1,531
        38% off
        38% off
        $1,531 $954
      • SEA 12:50 PM
        19h 25m
        1 stop
        KTI 10:15 PM
        Seattle - Phnom Penh | Mon, Sep 7 | Korean Air
        KTI 11:35 PM
        25h 5m
        1 stop
        SEA 10:40 AM
        Phnom Penh - Seattle | Mon, Sep 14 | Korean Air
        $972
        37% off
        $1,531 $972
      • SEA 12:25 PM
        31h 50m
        1 stop
        KTI 10:15 AM
        Seattle - Phnom Penh | Tue, Sep 1 | Cathay Pacific
        KTI 6:30 PM
        29h 50m
        1 stop
        SEA 10:20 AM
        Phnom Penh - Seattle | Wed, Sep 9 | Cathay Pacific
        $1,001
        35% off
        $1,531 $1,001
      • SEA 12:10 AM
        32h 15m
        1 stop
        KTI 10:25 PM
        Seattle - Phnom Penh | Tue, Sep 1 | Asiana Airlines
        KTI 11:35 PM
        25h 5m
        1 stop
        SEA 10:40 AM
        Phnom Penh - Seattle | Wed, Sep 9 | Korean Air
        $1,001
        35% off
        $1,531 $1,001
      • SEA 12:10 AM
        32h 15m
        1 stop
        KTI 10:25 PM
        Seattle - Phnom Penh | Fri, Aug 28 | Asiana Airlines
        KTI 11:25 PM
        29h 50m
        1 stop
        SEA 3:15 PM
        Phnom Penh - Seattle | Sat, Sep 5 | Asiana Airlines
        $1,050
        31% off
        $1,531 $1,050
      • SEA 1:20 PM
        18h 55m
        1 stop
        KTI 10:15 PM
        Seattle - Phnom Penh | Fri, Aug 28 | Korean Air
        KTI 11:35 PM
        25h 5m
        1 stop
        SEA 10:40 AM
        Phnom Penh - Seattle | Sat, Sep 5 | Korean Air
        $1,073
        30% off
        $1,531 $1,073
      • SEA 1:20 PM
        18h 55m
        1 stop
        KTI 10:15 PM
        Seattle - Phnom Penh | Sat, Aug 22 | Korean Air
        KTI 11:35 PM
        25h 25m
        1 stop
        SEA 11:00 AM
        Phnom Penh - Seattle | Sat, Aug 29 | Korean Air
        $1,074
        30% off
        $1,531 $1,074
      • SEA 10:15 AM
        32h 25m
        1 stop
        KTI 8:40 AM
        Seattle - Phnom Penh | Fri, Aug 28 | Singapore Airlines
        KTI 11:25 PM
        29h 50m
        1 stop
        SEA 3:15 PM
        Phnom Penh - Seattle | Sat, Sep 5 | Asiana Airlines
        $1,087
        28% off
        $1,531 $1,087
      • SEA 1:00 PM
        17h 25m
        1 stop
        KTI 2:00 PM
        Seattle - Phnom Penh | Tue, Jul 14 | Normal Airline
        KTI 3:00 PM
        6h
        Nonstop
        SEA 4:00 PM
        Phnom Penh - Seattle | Thu, Jul 16 | Normal Airline
        Find more flights
        Find more flights
      • SEA 10:15 AM
        32h 25m
        1 stop
        KTI 8:40 AM
        Seattle - Phnom Penh | Sun, Aug 30 | Singapore Airlines
        $369 $3,113
        88% off
        88% off
        $3,113 $369
      • SEA 10:15 AM
        32h 25m
        1 stop
        KTI 8:40 AM
        Seattle - Phnom Penh | Sat, Aug 29 | Singapore Airlines
        $425 $3,113
        86% off
        86% off
        $3,113 $425
      • SEA 10:15 AM
        32h 25m
        1 stop
        KTI 8:40 AM
        Seattle - Phnom Penh | Fri, Aug 28 | Singapore Airlines
        $432 $3,113
        86% off
        86% off
        $3,113 $432
      • SEA 10:15 AM
        32h 25m
        1 stop
        KTI 8:40 AM
        Seattle - Phnom Penh | Tue, Sep 8 | Singapore Airlines
        $432
        86% off
        $3,113 $432
      • SEA 10:15 AM
        32h 25m
        1 stop
        KTI 8:40 AM
        Seattle - Phnom Penh | Thu, Sep 3 | Singapore Airlines
        $432
        86% off
        $3,113 $432
      • SEA 10:15 AM
        32h 25m
        1 stop
        KTI 8:40 AM
        Seattle - Phnom Penh | Sun, Aug 23 | Singapore Airlines
        $434
        86% off
        $3,113 $434
      • SEA 12:25 PM
        31h 50m
        1 stop
        KTI 10:15 AM
        Seattle - Phnom Penh | Mon, Aug 31 | Cathay Pacific
        $526
        83% off
        $3,113 $526
      • SEA 12:25 PM
        38h 50m
        1 stop
        KTI 5:15 PM
        Seattle - Phnom Penh | Mon, Aug 24 | Cathay Pacific
        $614
        80% off
        $3,113 $614
      • SEA 11:10 PM
        34h 35m
        1 stop
        KTI 11:45 PM
        Seattle - Phnom Penh | Tue, Sep 1 | Philippine Airlines
        $688
        78% off
        $3,113 $688
      • SEA 11:10 PM
        34h 35m
        1 stop
        KTI 11:45 PM
        Seattle - Phnom Penh | Tue, Aug 4 | Philippine Airlines
        $2,210
        28% off
        $3,113 $2,210
      • SEA 1:00 PM
        17h 25m
        1 stop
        KTI 2:00 PM
        Seattle - Phnom Penh | Tue, Jul 14 | Normal Airline
        Find more flights
        Find more flights

Displayed flight fares from Seattle to Phnom Penh are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Find cheap airlines flights from Seattle to Phnom Penh

You can choose from 5 airlines that fly from Seattle to Phnom Penh, including Korean Air, China Airlines, and Asiana Airlines. Singapore Airlines has lowest fares on this route.
Korean Air logo Korean Air
China Airlines logo China Airlines
Asiana Airlines logo Asiana Airlines
EVA Air logo EVA Air
Cathay Pacific logo Cathay Pacific
Airlines are determined based on actual purchased flight tickets from Seattle to Phnom Penh according to previous 12 months data from Trip.com.

Flight Info | Seattle to Phnom Penh

The distance between Seattle and Phnom Penh is approximately 11,969.96 km. Based on Trip.com's data travel demand peaks in December. The off-season for travel is September.

Cheapest one-way flight price$369
Cheapest round-trip ticket price$907
Off-season for travelSeptember
Peak season for travelDecember
Flight distance11,969.96 km
Popular airlineKorean Air
Flight statistics for the Seattle–Phnom Penh route are based on aggregated booking data from Trip.com over the past 12 months.

Frequently Asked Questions

  • What are the cheapest flights from Seattle to Phnom Penh (SEA-KTI)?

    Based on Trip.com data, Singapore Airlines offers one-way fares as low as $369 on Cheapest nonstop routes (e.g. SEA to KTI on Sun, Aug 30), while Philippine Airlines offers Cheapest nonstop round-trips from $907 departing on Tue, Sep 1 and returning on Wed, Sep 9.
  • At the moment, you can catch a nonstop flight from Seattle to Phnom Penh with the following airlines, including: Hawaiian Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seattle to Phnom Penh is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Seattle to Phnom Penh, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sun, Aug 30, with one-way flights priced at just $369.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Singapore Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Phnom Penh travel is around December.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Seattle to Phnom Penh is September, when demand for travel is lower.
  • After crunching the numbers on our July flight calendar, it's currently cheapest to fly from Seattle to Phnom Penh on July 14, 2026 with Asiana Airlines, with prices starting at $1,324.
  • You can land at any one of the following hubs in Phnom Penh, with Seattle-Tacoma International Airport to Techo International Airport (SEA-KTI) is by far the most common option on this route: Phnom Penh International Airport (PNH) Techo International Airport (KTI).
  • The time difference between Phnom Penh and Seattle is 15h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

Explore More Popular Flights

Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

Book with no extra fees

Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.