$386 Find Cheap Flights to Siem Reap - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from the United States to Siem Reap departing on 8/16. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Book Cheap Siem Reap Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights to Siem Reap that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals to Siem Reap

Sun, Aug 16 - Wed, Aug 26
China Eastern Logo
12:30 pm - 8:10 pm
LAX
-
SAI
65h 40m
3 stops
China Eastern Logo
9:10 pm - 10:05 am
SAI
-
LAX
26h 55m
2 stops
$703China Eastern
Wed, Sep 16 - Wed, Oct 21
China Eastern Logo
12:30 pm - 8:10 pm
LAX
-
SAI
41h 40m
3 stops
China Eastern Logo
9:10 pm - 10:05 am
SAI
-
LAX
26h 55m
2 stops
$705China Eastern
Sun, Aug 16 - Wed, Aug 26
China Eastern Logo
12:30 pm - 8:10 pm
LAX
-
SAI
65h 40m
3 stops
China Eastern Logo
9:10 pm - 10:05 am
SAI
-
LAX
26h 55m
2 stops
$706China Eastern
Wed, Oct 14 - Wed, Oct 28
Singapore Airlines Logo
11:45 am - 3:10 pm
SFO
-
SAI
37h 25m
1 stop
Singapore Airlines Logo
10:45 am - 8:50 am
SAI
-
SFO
36h 05m
1 stop
$796Singapore Airlines
Sat, Oct 10 - Fri, Oct 16
Singapore Airlines Logo
10:15 am - 9:40 am
SEA
-
SAI
33h 25m
1 stop
Singapore Airlines Logo
4:00 pm - 8:45 am
SAI
-
SEA
30h 45m
1 stop
$801Singapore Airlines
Wed, Aug 12 - Tue, Sep 1
Multiple Airlines Logo
12:30 pm - 8:10 pm
LAX
-
SAI
41h 40m
3 stops
Multiple Airlines Logo
7:20 pm - 10:05 am
SAI
-
LAX
28h 45m
2 stops
$836Multiple Airlines
Fri, Oct 2 - Tue, Oct 27
Multiple Airlines Logo
12:30 pm - 9:00 am
LAX
-
SAI
30h 30m
2 stops
Multiple Airlines Logo
10:00 pm - 10:05 am
SAI
-
LAX
50h 05m
2 stops
$897Multiple Airlines
Wed, Oct 21 - Wed, Nov 4
Vietnam Airlines Logo
10:50 pm - 6:20 pm
SFO
-
SAI
29h 30m
1 stop
Vietnam Airlines Logo
6:40 pm - 5:00 pm
SAI
-
SFO
37h 20m
1 stop
$929Vietnam Airlines
Mon, Aug 31 - Tue, Sep 15
Emirates Logo
11:20 am - 9:30 pm
JFK
-
SAI
23h 10m
2 stops
Emirates Logo
11:50 pm - 8:50 am
SAI
-
JFK
44h 00m
2 stops
$1,091Emirates
Fri, Oct 23 - Sat, Oct 31
Emirates Logo
11:20 am - 9:30 pm
JFK
-
SAI
23h 10m
2 stops
Emirates Logo
11:50 pm - 2:55 pm
SAI
-
JFK
50h 05m
2 stops
$1,190Emirates
Booking Insights

KAYAK's insights & trends for flights to Siem Reap

Get data-powered insights and trends for flights to Siem Reap to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from the United States to Siem Reap?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from the United States to Siem Reap, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from the United States to Siem Reap is April, when tickets cost $248 (return) on average. On the other hand, the most expensive months are June and August, when the average cost of round-trip tickets is $811 and $611 respectively.

Good to know

Low seasonDecember
Best time to beat the crowds but there is an average 224% increase in price.
Most popular time to fly and prices are also 34% lower on average.

FAQs - booking Siem Reap flights

  • How does KAYAK find such low prices on flights from the United States to Siem Reap?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from the United States to Siem Reap.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from the United States to Siem Reap?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from the United States to Siem Reap is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from the United States to Siem Reap?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from the United States to Siem Reap with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from the United States to Siem Reap?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from the United States to Siem Reap up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Siem Reap

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Siem Reap flight deals.

Reviews of the top airlines flying to Siem Reap

 
See real verified KAYAK customer reviews for airlines flying to Siem Reap. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from the United States to Siem Reap. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from the United States 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 1565 reviews
8.6Crew
8.0Entertainment
7.8Food
8.3Boarding
8.0Comfort
Airline reviews

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

2.0 MediocreAnonymous, Jun 2026
SFO - SIN
Read more Singapore Airlines reviews

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.

They ran out of the second choice of food was stuck with fish

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.

Overall, very pleased with this flight. Boarding could be better because boarding was announced without a microphone so people didn’t know to line up until we heard the staff walking around to announce it. Also, had to stand in line for 10’ before we started moving. My husband who is impatient and cannot stand for too long did not like this. The rest of the flight- crew, food, and entertainment were very good.

Boarding and deviating was mediocre. At boarding they have not prioritized Business class. During debarking they prioritized premium economy. Also bus rides both times.

The vietnam airlines app was not able to allow checkin with the confirmation nor with the ticket number. This led to quite a bit of consternation. Speaking with a colleague from Hanoi, he did tell me that their app is not the best. It may be best to inform travelers to only use the link and to plan on checking in at the airport for this airline. The check-in was very easy and the staff were excellent.

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

For a domestic flight, seats are ok, but fir us as tall dutchies, the legroom is too small. However, for a short and affordable flight, is not a big problem. Staff is still very nice and a complementary water very welcome.

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.

An excellent airline; polite and courteous cabin crew, excellent meal and drink service. Highly recommended.

No space in between the seats as per them the average height of human is 5’3” and weight as 55, so seats are designed as per the same. Also, the aircraft was dirty and full of insects

Everything you need to know for your flight to Siem Reap