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Cheap flights from Las Vegas to Siem Reap from $1,598

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Las Vegas to Siem Reap departing on 4/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Las Vegas to Siem Reap

Cheap round-trip flights

Enter your travel dates to find the best prices.
Qatar Airways Logo
7:15 am - 12:15 pm
LAS
-
SAI
39h 00m
3 stops
Qatar Airways Logo
7:30 pm - 8:58 pm
SAI
-
LAS
39h 28m
3 stops
$1,598Qatar Airways
Mon, Apr 13 - Thu, Apr 23
Singapore Airlines Logo
10:39 am - 3:10 pm
LAS
-
SAI
38h 31m
2 stops
Singapore Airlines Logo
10:30 am - 11:58 pm
SAI
-
LAS
51h 28m
3 stops
$1,772Singapore Airlines
Mon, Apr 13 - Thu, Apr 23
Multiple Airlines Logo
6:15 am - 12:15 pm
LAS
-
SAI
40h 00m
2 stops
Multiple Airlines Logo
7:30 pm - 10:17 pm
SAI
-
LAS
40h 47m
2 stops
$1,791Multiple Airlines
Mon, Apr 13 - Thu, Apr 23

momondo Fare Finder

 
Customize your flight search to find flights from Las Vegas to Siem Reap that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 23, 2026.
Use the filters below to find and compare flights from Las Vegas to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Las VegasSiem Reap

LAS - SAI

LASSAI

Las Vegas Harry Reid Intl

Mon 4/13

7:15 am-12:15 pm

3 stops39h 00m

Siem Reap–Angkor Intl

Thu 4/23

7:30 pm-8:58 pm

3 stops39h 28m

$1,598

Las VegasSiem Reap

LAS - SAI

LASSAI

Las Vegas Harry Reid Intl

Mon 4/13

10:39 am-3:10 pm

2 stops38h 31m

Siem Reap–Angkor Intl

Thu 4/23

10:30 am-11:58 pm

3 stops51h 28m

$1,772

Las VegasSiem Reap

LAS - SAI

LASSAI

Las Vegas Harry Reid Intl

Mon 4/13

6:15 am-12:15 pm

2 stops40h 00m

Siem Reap–Angkor Intl

Thu 4/23

7:30 pm-10:17 pm

2 stops40h 47m

$1,791

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from Las Vegas to Siem Reap

Are you open to changing your travel dates? Check out the ideal times to fly from Las Vegas to Siem Reap according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Las Vegas to Siem Reap (LAS to SAI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Las Vegas to Siem Reap

Fastest flight time

39h 00m

Direct flights

None
The fastest flight from Las Vegas to Siem Reap takes 39h 00m
There are no direct flights from Las Vegas to Siem Reap. There are no popular flight routes from Las Vegas to Siem Reap.
Search flight deals

  • How far is Las Vegas Harry Reid Intl to Siem Reap–Angkor Intl by plane?

    The straight-line distance from Las Vegas Harry Reid Intl to Siem Reap–Angkor Intl is 8168.0 mi. Typically, this will take 39h 00m by plane in normal conditions.

  • When did momondo last update prices for flights from Las Vegas Harry Reid Intl Airport to Siem Reap–Angkor Intl Airport?

    Prices for flights from Las Vegas Harry Reid Intl Airport to Siem Reap–Angkor Intl Airport were last updated today.

  • How old do you have to be to fly from Las Vegas Harry Reid Intl Airport to Siem Reap–Angkor Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Las Vegas Harry Reid Intl Airport to Siem Reap–Angkor Intl Airport.

  • What documentation or ID do you need to fly to Siem Reap–Angkor Intl Airport?

    The necessary travel and health documents for your Siem Reap–Angkor Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • How do I get Price Alerts for flights from Las Vegas to Siem Reap?

    Confirm your travel details to search for the latest offers for flights from Las Vegas to Siem Reap. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Las Vegas to Siem Reap with momondo?

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Why use momondo?

Why should I use momondo to find a flight deal from Las Vegas to Siem Reap?

It is quick and easy to find Las Vegas to Siem Reap flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Siem Reap that suits you.

Can I find flights from Las Vegas to Siem Reap with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Siem Reap from Las Vegas with this policy.

How can momondo help me find flights from Las Vegas to Siem Reap?

momondo provides multiple filters to help you find the best flight to Siem Reap from Las Vegas. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Las Vegas to Siem Reap right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Las Vegas to Siem Reap flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Cabin classes currently available on flights to Siem Reap

List of cabin classes available on flights landing in Siem Reap. Availability may vary depending on flight origin and airline.
First Class to Siem Reap
Business Class to Siem Reap