The cheapest times to fly from IAD to LAS are
- January 1st to March 11th
- August 13th to December 16th (except the weeks of November 19th and November 26th)
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 IAD to LAS is late October. Prices can be as high as $814 for Sunday flights during early August, or as low as $245 for Tuesday flights around late October.
When to Fly to Las Vegas
Flying from Washington, DC (IAD) to Las Vegas, NV (LAS) will usually cost between $314 to $528 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late October with an average ticket price of $319. Due to high demand the most expensive time to fly is early August, with an average price of $513. Planning your trip to low-cost times can easily save you $194 on economy flights and even more on first-class flights. Generally, any price below $378 can be considered a good price for a round-trip IAD to LAS flight.
See below for a graph of average weekly prices for the IAD to LAS route. All prices are for round-trip tickets in USD.
Compared to other flights, the IAD to LAS flight is much cheaper than the average and costs much less than the average flight leaving from Washington. The average price per mile (for a direct flight) is $0.11, which is far below average.
Flight Prices by Day of the Week
Tuesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $110 (25%) on this flight.
Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $329. Return trip prices are from the LAS to IAD flight, and often highlight the quality of our data in showing the same trend.
Departing Prices by Day
Return Trip Prices by Day
Nonstop Flights and Layovers
Travelers looking to fly from IAD to LAS can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 4 hour 41 minutes may be realistic.
Flight Questions Answered
Still have questions about flying from IAD to LAS? We’ve got answers.
Which airlines fly this route?
You can find 12 major airlines flying this route most often: Alaska, Allegiant, American, China Eastern, Delta, Fiji Airways, Frontier, Qantas, Singapore Airlines, Southwest, Sun Country Airlines, United, and potentially more during busy seasons.
How far away is it from McCarran International Airport to Washington Dulles International Airport?
The distance between the two airports is roughly 2060 miles or 3315 kilometers.
How long does it take to fly from IAD to LAS?
The real-world flight time for a nonstop IAD to LAS flight is about 4 hour 41 minutes.
How many flights go between Washington, DC and Las Vegas, NV?
It depends on the day of the week and the date, but a typical day might have around 85 available flights from IAD to LAS.
Airport Location Info
|Origination airport name||Washington Dulles International Airport|
|Country||the United States|
|Destination airport name||McCarran International Airport|
|City||Las Vegas, NV|
|Country||the United States|
Late and Early Flight Data
Flights from IAD to LAS tend to depart as late as the average flight. According to our recently updated data, 25% of flights departed 5 or more minutes late, and 25% of flights left 5 or more minutes early. On average you can expect to leave LAS heading for IAD about 18 minutes late. This does significantly impact arrival time, as the average landing time in Las Vegas, NV is about 18 minutes late. The numbers below show a recent average of take-off times versus the scheduled departure flight:
- United: 14 minutes late
- Frontier: 41 minutes late
- Some airlines not reporting
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.