Trip.com
>
Cheap Flights
>
Cambodia
>
Siem Reap Province
>
Siem Reap
Hotels in Siem Reap
>
Flights from Portland to Siem Reap

Flight deals from Portland to Siem Reap

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • Round-trip
  • One way

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Flight Information from Portland to Siem Reap

Cheapest one-way flight price £559
Cheapest return ticket price £1,365
Off-season travel month March
Peak season for travel March
Flight distance 11,973.32km

Find the best time to fly from Portland to Siem Reap

We monitor flight fares to help you find the best deals effortlessly

Cheapest flights
From price
Search
  • 22 29

  • Jul

    29 6
  • 6 13
  • 13 20
  • 20 27

  • Aug

    27 3
  • 3 10
  • 10 17
  • 17 24
  • 24 31

  • Sep

    31 7
  • 7 14
Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

FAQ

  • When are flight tickets from Portland (PDX) to Siem Reap (REP) the cheapest?

    Airlines adjust prices for flights from Portland to Siem Reap based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much are flights from Portland (PDX) to Siem Reap (REP) cost?

    According to Trip.com's data, the lowest price is around £1,158.

  • How many airports in Siem Reap (REP)?

    There are 1 airport(s) in Siem Reap (REP): Siem Reap Angkor International Airport.

How to find a cheap flight from Portland to Siem Reap

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Portland to Siem Reap. Book your flights at the right time and save more.
1
Be flexible with your travel dates to get the cheapest flight from Portland to Siem Reap.
Tap "Date" on the flight search bar to browse the calendar for Portland to Siem Reap airfare over the next 6 months in 2025.
2
Compare cheap flight deals from Portland to Siem Reap across hundreds of airlines.
Use our comprehensive search to compare fares from over 500 airlines and find the most affordable flight tickets from Portland to Siem Reap.
3
Set up a Price Alert
By setting up a Price Alert for your journey from Portland to Siem Reap, you can easily keep an eye on ticket prices without having to check every day.
4
Don't miss out on cheap flight deals and promo codes from Portland to Siem Reap.
You can always find the latest offers through Trip.com Deals and Promo Codes for cheap flights. By signing up for a free membership, you'll get access to even more deals for your flights.
5
Book early or wait until the last minute.
It's usually best to book early. Flight tickets are often cheapest when they're first released, typically about a year before the departure date. So, have a look online as soon as the flights you're interested in become available. If you miss the cheapest time, you might still find some good deals as the departure date gets closer.
6
Search for flights on the go.
For the best travel flight booking experience, download the Trip.com app. You can search for cheap flights from Portland to Siem Reap and snag some exclusive deals just for you.

More Travel Options

  • Top Routes from Portland
  • Top Routes to Siem Reap
  • Popular Airlines