SEA - KTI

Find cheap flights from Seattle to Phnom Penh - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Nonstop flights
Not available
There are currently no direct flights between Seattle and Phnom Penh. You'll need to take a connecting flight to reach the destination.
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When to book
9 weeks
in advance
Our data shows that travelers who book at least 9 weeks in advance save around 42% compared to booking last minute.
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Insights
When to travel
August
Cheapest • 19% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Manila Ninoy Aquino Intl (MNL)
Cheapest • Avg $896 (round-trip)
Taipei City Taiwan Taoyuan Intl (TPE)
Shortest trip • 20h 15m (one-way)
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Flight Deals

Cheap Flights from Seattle to Phnom Penh (SEA-KTI)

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

Recent round-trip flight deals from Seattle to Phnom Penh

Multiple Airlines Logo
SEA  Seattle/Tacoma Airport-KTI Phnom Penh Techo Intl
7440 mimulti-stop
Multiple Airlines Logo
KTI  Phnom Penh Techo Intl-SEA Seattle/Tacoma Airport
7440 mimulti-stop
Multiple Airlines
Booking Insights

Price, demand and travel trends for Seattle to Phnom Penh flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Seattle to Phnom Penh with more confidence.

What's the cheapest day of the week to fly from Seattle to Phnom Penh?

Sunday is the cheapest day of the week to fly from Seattle to Phnom Penh, it is 12% cheaper than the average day. Friday is the most expensive day with flight prices 12% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is the cheapest month to fly from Seattle to Phnom Penh?

  • August is the cheapest month to fly from Seattle to Phnom Penh at $849 round-trip.
  • December ($1,398) and July ($1,162) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 64% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from Seattle to Phnom Penh the cheapest?

Flights from Seattle to Phnom Penh are cheapest 9 weeks before departure. Booking in this window typically costs about 42% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Key details for Seattle to Phnom Penh flights

Low season

February
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly with an average 11% increase in price.

When to book flights from Seattle to Phnom Penh

Are your dates flexible? Find out the best times to travel from Seattle 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 Seattle 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 Seattle to Phnom Penh?

    Flights from Seattle to Phnom Penh usually depart from Seattle/Tacoma Intl (SEA) and arrive at Phnom Penh Techo Intl (KTI).

  • What cabin classes can I book on flights from Seattle to Phnom Penh?

    Three cabin classes are available on flights from Seattle to Phnom Penh:

    • Economy Class
    • Premium Economy Class
    • Business Class

  • Which airports do connecting flights from Seattle to Phnom Penh pass through?

    One-stop flights from Seattle to Phnom Penh most commonly connect through:

    • Incheon Intl (ICN) - 45% of one-stop connections
    • Taipei City Taiwan Taoyuan Intl (TPE) - 41% of one-stop connections
    • Singapore Changi (SIN) - 12% of one-stop connections
    • Hong Kong Intl (HKG) - 1% 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 Seattle to Phnom Penh?

    On the Seattle to Phnom Penh route, being flexible with your departure day can save you up to 22%. Sunday is the cheapest day at $925 round-trip on average, while Friday is the most expensive at $1,178: a $253 difference. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

  • How expensive are last-minute Seattle to Phnom Penh flights?

    Last-minute fares on this route - booked within 2 weeks of departure - run 28% above the route average of $1,047. Book 9 weeks before departure for the lowest fares.

  • How long is a flight from Seattle to Phnom Penh?

    A nonstop flight from Seattle to Phnom Penh takes 0h 00m, covering 7,440 miles.

  • Do I need a passport to fly from Seattle 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 Seattle to Phnom Penh?

    Flying via Taipei City Taiwan Taoyuan Intl (TPE) gives the shortest average 1-stop total travel time at 20h 15m, compared with 26h 13m via Incheon Intl (ICN) and 31h 00m via Hong Kong Intl (HKG).

  • What is the time difference between Seattle and Phnom Penh?

    Phnom Penh is 14 hours ahead of Seattle (Indochina Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

  • How much should I expect to pay for a Seattle to Phnom Penh flight?

    Round-trip flights from Seattle to Phnom Penh range from $815 to $1,311, with an average of $1,047 over the past 12 months. Anything below $815 counts as a good deal.

Your guide to booking Seattle 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 Sunday departure instead of Friday. On this route, Sunday flights average $925 - about $253 less than Friday (21% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 9 weeks before you fly. On this route, that window historically saves about 42% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Seattle to Phnom Penh trip for August. Fares historically average $849 round-trip in that month - typically $549 less than the most expensive month, which is December (based on the last 12 months).

Everything you need to know for your flight from Seattle to Phnom Penh

Information on your arrival and departure airports

Seattle (SEA)
Phnom Penh (KTI)