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Siem Reap

Cheap flights from Portland (PDX) to Siem Reap, Cambodia (SAI)

PDX — SAI
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Best time to book a flight from Portland to Siem Reap

Have a flexible travel schedule? Discover the best time to fly to Siem Reap from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to Siem Reap

What is the cheapest time of day to fly from PDX to SAI?

Find hourly flight availability from Portland to Siem Reap. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 20, 2025.

One of the essential ways to save on airfare from Portland to Siem Reap is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 9% on airfare.

Reviews of airlines servicing Siem Reap

Get insights into the airlines that provide service to Siem Reap. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Siem Reap. Reviews last updated August 20, 2025.
Read through reviews of airlines operating flights from Portland to Siem Reap, such as Singapore Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.1
Very good
1,347 reviews

Overall

8.1

Comfort

8.0

Boarding

8.2

Crew

8.6

Entertainment

8.0

Food

7.7

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Singapore Airlines
8.1
Very good
1,347 reviews
Singapore Airlines
8.1
Very good
1,347 reviews

Overall

8.1

Comfort

8.0

Boarding

8.2

Crew

8.6

Entertainment

8.0

Food

7.7

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.

Related info for your journey

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

  • What is the cheapest airline to fly from Portland to Siem Reap round-trip?

    Our cheapest airline available from Portland to Siem Reap is Singapore Airlines. Our recent data shows that you can find tickets from as low as $1,091 on this airline.

  • Can I find deals for flights from Portland to Siem Reap that include hotel bookings?

    Yes. In addition to deals on Portland to Siem Reap flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Siem Reap?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Siem Reap.

  • Can I find deals for business class flights from Portland to Siem Reap?

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

See more FAQs

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Top airline flying from Portland to Siem Reap

Discover the top airline that operate flights from Portland to Siem Reap. 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 August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$1,091Average$1,239FlexibilityNo cancel feeOn-time81%

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