The cheapest times to fly from USM to LAS are

  • February 19th to March 25th
  • April 23rd to June 17th
  • October 8th to December 9th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from USM to LAS is late October to early November. Prices can be as high as $5316 for Sunday flights during early August, or as low as $1710 for Monday flights around late October to early November.


When to Fly to Las Vegas

Flying from Koh Samui (USM) to Las Vegas, NV (LAS) will usually cost between $1710 to $4952 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late October to early November with an average ticket price of $1710. Due to high demand the most expensive time to fly is early August, with an average price of $4981. Planning your trip to low-cost times can easily save you $3271 on economy flights and even more on first-class flights. Generally, any price below $1974 can be considered a good price for a round-trip USM to LAS flight.

See below for a graph of average weekly prices for the USM to LAS route. All prices are for round-trip tickets in USD.

USM to LAS Flight Prices

Compared to other flights, the USM to LAS flight is more expensive than the average and costs slightly more than the average flight leaving from Ko Samui. The average price per mile (for a direct flight) is $0.14, which is far below average.


Flight Prices by Day of the Week

Monday is usually the cheapest day to fly to LAS, and Wednesday the cheapest day to fly back into USM. Sundays are the most expensive days to fly to Las Vegas, and Saturdays are the most expensive days to return to Ko Samui. Selecting flights on the least expensive days could save you up to $394 (10%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Monday and returning a week later will cost an average of $2294. Return trip prices are from the LAS to USM flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from USM to LAS can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 16 hour 21 minutes may not be realistic.


Flight Hacking USM to LAS

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from USM to LAS — but Champion Traveler does!

Hack #1: Hong Kong (USM > HKG > LAS)

  • Price for both tickets: $1218
  • Average savings: $757 (38.32%)

See USM to LAX flights

Hack #2: Los Angeles, CA (USM > LAX > LAS)

  • Price for both tickets: $1233
  • Average savings: $742 (37.56%)

See USM to HKG flights

Hack #3: Singapore (USM > SIN > LAS)

  • Price for both tickets: $1302
  • Average savings: $672 (34.04%)

See USM to SIN flights


Flight Questions Answered

Still have questions about flying from USM to LAS? We’ve got answers.

Which airlines fly this route?

You can find 14 major airlines flying this route most often: Alaska, American, Austrian, Bangkok Airways, British Airways, Cathay Pacific, China Airlines, Delta, JAL, KLM, Malaysia Airlines, Singapore Airlines, United, WestJet, and potentially more during busy seasons.

How far away is it from McCarran International Airport to Samui Airport?

The distance between the two airports is roughly 8539 miles or 13742 kilometers.

How long does it take to fly from USM to LAS?

The real-world flight time for a nonstop USM to LAS flight is about 16 hour 21 minutes.

How many flights go between Koh Samui and Las Vegas, NV?

It depends on the day of the week and the date, but a typical day might have around 9 available flights from USM to LAS.


Airport Location Info


Departing Airport

Origination code USM
Origination airport name Samui Airport
City Koh Samui
Country Thailand
Latitude 9.5
Longitude 100.1

Return Airport

Destination code LAS
Destination airport name McCarran International Airport
City Las Vegas, NV
Country the United States
Latitude 36.1
Longitude -115.2


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.