SAI

$315 Find Cheap Flights to Siem Reap - Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
$584
Typical prices: $1,028-$1,707
Singapore Airlines
Mon 1/15Tue 1/23
SEA - SAI • 1 stop
Cheapest one-way
$315
Typical prices: $572-$910
Singapore Airlines
Sat 1/20
SEA - SAI • 1 stop
Top airlines
Best reviews • 8.2 score
Airline reviews
Airline reviews
When to travel
Cheapest • 20% price drop
Most popular
Good to know
+1
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Siem Reap!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights to Siem Reap

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

Recent round-trip flight deals to Siem Reap

Fri, Jan 15 - Sat, Jan 23
Singapore Airlines Logo
8:40 am - 9:55 amSEA  Seattle/Tacoma Intl-SAI Siem Reap–Angkor Intl
34h 15m1 stop Singapore Changi
Singapore Airlines Logo
10:45 am - 7:05 amSAI  Siem Reap–Angkor Intl-SEA Seattle/Tacoma Intl
35h 20m1 stop Singapore Changi
$584Singapore Airlines
Wed, Jan 20 - Tue, Jan 26
Singapore Airlines Logo
8:40 am - 9:55 amSEA  Seattle/Tacoma Intl-SAI Siem Reap–Angkor Intl
34h 15m1 stop Singapore Changi
Singapore Airlines Logo
10:45 am - 7:05 amSAI  Siem Reap–Angkor Intl-SEA Seattle/Tacoma Intl
35h 20m1 stop Singapore Changi
$585Singapore Airlines
Fri, Jan 15 - Sat, Jan 23
Singapore Airlines Logo
8:40 am - 4:00 pmSEA  Seattle/Tacoma Intl-SAI Siem Reap–Angkor Intl
40h 20m1 stop Singapore Changi
Singapore Airlines Logo
10:45 am - 7:05 amSAI  Siem Reap–Angkor Intl-SEA Seattle/Tacoma Intl
35h 20m1 stop Singapore Changi
$588Singapore Airlines
Tue, Nov 17 - Thu, Dec 10
China Eastern Logo
11:30 am - 8:05 pmLAX  Los Angeles-SAI Siem Reap–Angkor Intl
41h 35m3 stops Shanghai Pu Dong Fuzhou Kunming Changshui
China Eastern Logo
9:05 pm - 9:05 amSAI  Siem Reap–Angkor Intl-LAX Los Angeles
51h 00m3 stops Kunming Changshui Fuzhou Shanghai Pu Dong
$710China Eastern
Tue, Nov 17 - Thu, Dec 10
China Eastern Logo
11:30 am - 8:05 pmLAX  Los Angeles-SAI Siem Reap–Angkor Intl
41h 35m2 stops Shanghai Pu Dong Kunming Changshui
China Eastern Logo
9:05 pm - 9:05 amSAI  Siem Reap–Angkor Intl-LAX Los Angeles
51h 00m2 stops Kunming Changshui Shanghai Pu Dong
$710China Eastern
Tue, Nov 17 - Thu, Dec 10
China Eastern Logo
11:30 am - 8:05 pmLAX  Los Angeles-SAI Siem Reap–Angkor Intl
41h 35m3 stops Shanghai Pu Dong Fuzhou Kunming Changshui
China Eastern Logo
9:05 pm - 9:05 amSAI  Siem Reap–Angkor Intl-LAX Los Angeles
51h 00m2 stops Kunming Changshui Shanghai Pu Dong
$710China Eastern
Tue, Jan 26 - Fri, Feb 26
Singapore Airlines Logo
8:40 am - 4:00 pmSEA  Seattle/Tacoma Intl-SAI Siem Reap–Angkor Intl
40h 20m1 stop Singapore Changi
Singapore Airlines Logo
10:45 am - 7:05 amSAI  Siem Reap–Angkor Intl-SEA Seattle/Tacoma Intl
35h 20m1 stop Singapore Changi
$733Singapore Airlines
Sun, Nov 1 - Wed, Nov 18
Vietnam Airlines Logo
9:10 pm - 8:30 pmSFO  San Francisco-SAI Siem Reap–Angkor Intl
32h 20m1 stop Ho Chi Minh City
Vietnam Airlines Logo
9:30 pm - 5:00 pmSAI  Siem Reap–Angkor Intl-SFO San Francisco
34h 30m1 stop Ho Chi Minh City
$860Vietnam Airlines
Wed, Oct 28 - Wed, Nov 25
Vietnam Airlines Logo
10:10 pm - 8:30 pmSFO  San Francisco-SAI Siem Reap–Angkor Intl
32h 20m1 stop Ho Chi Minh City
Vietnam Airlines Logo
9:30 pm - 5:00 pmSAI  Siem Reap–Angkor Intl-SFO San Francisco
34h 30m1 stop Ho Chi Minh City
$860Vietnam Airlines
Sun, Oct 25 - Tue, Nov 24
Vietnam Airlines Logo
10:10 pm - 8:30 pmSFO  San Francisco-SAI Siem Reap–Angkor Intl
32h 20m1 stop Ho Chi Minh City
Vietnam Airlines Logo
6:40 pm - 5:00 pmSAI  Siem Reap–Angkor Intl-SFO San Francisco
37h 20m1 stop Ho Chi Minh City
$860Vietnam Airlines
Booking Insights

Price, demand and travel trends for United States to Siem Reap flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from the United States to Siem Reap with more confidence.

What is the cheapest day to fly to Siem Reap?

Wednesday is the cheapest day to fly to Siem Reap at $1,202 round-trip on average over the past 12 months on KAYAK. Thursday is the most expensive at $1,359.

What is the cheapest month to fly to Siem Reap?

•September is the cheapest month to fly to Siem Reap with an average price of $1,009 round-trip.
•July ($2,083) and June ($1,791) are the most expensive.
•Based on KAYAK data over the past 12 months.

What is the cheapest time of day to fly to Siem Reap?

Morning flights to Siem Reap are the cheapest at $1,162 round-trip on average. Afternoon flights are the most expensive at $1,584.

Key details for flights to Siem Reap

Low season

August

Cheapest flight

$315
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from Seattle to Siem Reap

When to book flights to Siem Reap

Are your dates flexible? Find out the best times to travel to Siem Reap based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your questions about flights to Siem Reap, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • What is the difference between the most popular and the most frequent airline at Siem Reap?

    United Airlines operates the most flights from the United States to Siem Reap at 0 per week, while Singapore Airlines is the airline most often selected by KAYAK users searching for flights from the United States to Siem Reap. The two are often different because flight volume reflects an airline's schedule, while popularity reflects traveler choice.

  • How far is Siem Reap–Angkor Intl from downtown Siem Reap?

    Siem Reap–Angkor Intl is 24.7 mi from downtown Siem Reap.

  • How do I know if a flight to Siem Reap is a good deal?

    A good deal on a flight to Siem Reap is around $1,028 round-trip. This fare is in the lowest 25% of round-trip prices searched on KAYAK, averaged across the cities most often searched as origins by KAYAK users.

Your guide to booking Siem Reap flights

From booking to airport arrival, find tips to help you plan your flight with more confidence.
  • For flights to Siem Reap, recent KAYAK data shows that stronger deals tend to land around $1,028 round-trip. If you see a fare below that threshold, it's a strong deal – book before the price climbs back up.
  • If you can choose when to go, time your trip to Siem Reap around September. Round-trip fares historically average $1,009 that month – typically the cheapest month to travel based on the last 12 months.
  • Before you book:

    • Check the route's typical price range so you can spot a deal.
    • Confirm baggage fees and seat-selection costs on budget carriers.
    • Verify whether you need any travel documents beyond ID.
    • Pick a departure airport, since your nearest may not be the cheapest origin.
  • Shift your departure to morning to save up to $422 per round-trip. Morning flights to Siem Reap average $1,162 compared to $1,584 for noon flights. See the time-of-day chart above for the full breakdown.
  • Once you arrive in Siem Reap, a few great places to start are Angkor Night Market, Angkor National Museum and Psar Chaa. These are popular with first-time visitors and can give you a good feel for the area.

Reviews of the top airlines flying to Siem Reap

 
Need help choosing which airline to fly with to Siem Reap? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.2
Singapore AirlinesOverall score based on 1606 reviews
8.0Comfort
8.3Boarding
8.1Entertainment
7.8Food
8.6Crew
Airline reviews

I purchased my two tickets on February 2025. Tickets were by each other, aisle and window. However, when we were boarded the assigned seats were one by the window and the other one in the middle of the four seated row. It was a horrible experience and we had to tolerate 17 hours of flight seating by different people. If the airline changes the seat arrangement, it should have the decency to notify the passengers in advance. I have checked my return tickets to Los Angeles, and I have noticed that they are not by each other and I don’t know what to do. I hope someone contacts me and rectify this mistake.

4.0 OkayFarid, Sep 2026
Read more Singapore Airlines reviews

I purchased my two tickets on February 2025. Tickets were by each other, aisle and window. However, when we were boarded the assigned seats were one by the window and the other one in the middle of the four seated row. It was a horrible experience and we had to tolerate 17 hours of flight seating by different people. If the airline changes the seat arrangement, it should have the decency to notify the passengers in advance. I have checked my return tickets to Los Angeles, and I have noticed that they are not by each other and I don’t know what to do. I hope someone contacts me and rectify this mistake.

I had selected seats together for my family of three when I first booked my tickets in February. However, I realized only when I checked in at the airport that the seats I had selected were no longer assigned to us and we were completely scattered across three different middle seats instead of being seated together! After requesting the Singapore staff to have us seated together on a full flight, they managed to find something but it was right next to the rest rooms and the whole journey of 15+ hours was really unpleasant. They said that the seat selection isn't locked and the airline can reallocate the seats anytime. No one ever told us this and it was a terribly unpleasant surprise. Will avoid Kayak/underpricer and Singapore in future

The friendliness of the attendants, and the quality of the service.

Flight attendants were awesome! Very helpful and patients. Some food were good but maybe not serving fish that kinda make the whole aircraft smell fishy. The “fried pork” was tasty but too much skin so it doesnt taste that great.

Very concerned with guest comforts going out of their way to accommodate special dietary needs when the guests hadn’t pre-ordered.

Clean modern comfortable. Food could have been better, I only ate breakfast I wish they wouldn’t wake sleeping passengers who would rather sleep through dinner. No tea or coffee for breakfast

Food was terrible , uncomfortable seats, WiFi did not work, will never fly Singapore again.

I had ordered vegetarian food. What I was presented was extremely dissatisfying and not up to the mark. I pretty much did not eat entire 19 hours. For.an airline voted as best in business, it was extremely disappointing. Seats were not comfortable to sleep. Entertainment system didn’t have much choice. WiFi didn’t work for more than half the time. Cabin crew were also difficult to understand. A bit of diversity like Emirates crew would go a long way.

A little more room from the reclining seat in the front of me.

Crews are not allowed to perform any service whenever the captain deems there’s a chance of turbulence. Even if it is perfectly smooth air.

This was our fourth domestic flight with Vietnam Airlines, and once again we found the experience very suitable. Check-in was easy and efficient. They did take our carry-on luggage, but that was fine. I’m actually happy not to deal with it on such a short flight. The flight was just over an hour, departed on time, and we climbed above the clouds into a beautiful sunset. Even on such a short flight, they served water, which we appreciated. Luggage came out into carousel in Nha Trang in good time and off we went to meet our GRAB. Also, Vietnam Airlines have easy to locate ground level offices in cities and towns where you can get assistance with staff. I liked this service as we did go visit one in Nha Trang. We would definitely recommend Vietnam Airlines and wouldn’t hesitate to fly with them again.

This is a very short commuter flight, so there is no food or flight entertainment. Hence, I marked it in the neutral flight left on time. The plane was full pretty much and it was a pretty easy flight overall very good.

Food and welcome services were good , however we experienced issues with the entertainment system and poor headsets

Lovely staff, comfortable seats. Transit time was short but they had great processes in place to get us on the plane.

2 hours delay, time changes started already 2 days before the flight

I bought the front row seat and made and early online check in but they changed my seat to the back row without prior notice. The inflight meal was too poor, only a piece of small finger food. The boarding is a disaster, everyone is stuffed in a bus in chaos. Doesnt worth the money at all.

I am a bit upset with the check in counter, I signed up a wheelchair for my mom so they wouldn’t grant us her boarding pass. We got to the airport a couple of hours earlier and they had us wait and no one ever gave us her boarding pass or the wheelchair, I had to go back and complain when it was already time for our flight to board. Since we got their earlier, I could have easily pushed my mom myself and we could have relaxed and went to the lounge while waiting… when I finally got someone to help us he couldn’t explain how and why they dismissed us in the first place.

Was on holiday with my partner and we booked with Vietnam airlines as it not meant to be a budget airline. They separated us and made us sit at either end of the plane. Not the way I planned to spend my time on my holiday separate from my loved one. How can they separate people on the same booking. They know we are together and spending quality time together.

Inflight entertainment is limited. Boarding process is delayed and interrupted.

The most attentive crew and although we were a little late leaving ( missing passenger) flight experience more than compensated . Best flight attendants I have flown with in 50 years !!

More options for your flight to Siem Reap