Travelers have found that booking a Monday departure is the best way to save up to 46% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.
Flights from Portland to Siem Reap lean towards being more expensive in July. Prices are generally better when you fly from Portland to Siem Reap in February, with the cheapest ticket starting at $871.
When flying from Portland to Siem Reap, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 19% versus a flight in the afternoon.
Portland
Siem Reap
3 stops
45h 55mSiem Reap
Portland
2 stops
54h 19mMultiple Airlines
Portland
Siem Reap
2 stops
39h 50mSiem Reap
Portland
2 stops
54h 19mMultiple Airlines
Portland
Siem Reap
3 stops
45h 55mSiem Reap
Portland
3 stops
54h 19mMultiple Airlines
Portland
Siem Reap
3 stops
37h 35mSiem Reap
Portland
3 stops
39h 51mQatar Airways
Portland
Siem Reap
3 stops
37h 45mSiem Reap
Portland
3 stops
38h 32mQatar Airways
Food
Entertainment
Boarding
Overall
Comfort
Crew
Reviews
The crew from LAX was very helpful and made sure that me and my sister was sitting together for that long leg of a flight.The crew on flight SQ37 were very professional ,attentive ,and kind and willing to help you for whatever you need to make the flight comfortable . I would use Singapore Airlines again
Food
Entertainment
Boarding
Overall
Comfort
Crew
Reviews
The crew from LAX was very helpful and made sure that me and my sister was sitting together for that long leg of a flight.The crew on flight SQ37 were very professional ,attentive ,and kind and willing to help you for whatever you need to make the flight comfortable . I would use Singapore Airlines again
Food
Entertainment
Boarding
Overall
Comfort
Crew
Reviews
The crew from LAX was very helpful and made sure that me and my sister was sitting together for that long leg of a flight.The crew on flight SQ37 were very professional ,attentive ,and kind and willing to help you for whatever you need to make the flight comfortable . I would use Singapore Airlines again
Singapore Airlines and Cathay Pacific are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.
Yes, there are multiple flights from Portland to Siem Reap for under $1,400. The cheapest flight booked recently is on Multiple Airlines for just $1,305, but on average you can expect to pay $1,780.
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 $1,666 on this airline. An additional option worth looking into is Qatar Airways, starting at $1,958.
Looking for the cheapest flight from Portland to Siem Reap? While on average our users pay $1,927, our data indicates the cheapest price to be $668. The most popular route (Portland - Siem Reap), is priced around $1,305.