Cheap flights from Washington, D.C. Dulles Intl Airport to Las Vegas from $121

The month of August is, on average, the cheapest month to fly to Las Vegas from Washington, D.C. Dulles Intl Airport, with most prices found around $240. The month of July is another great option to travel to Las Vegas, with average flight prices from Washington, D.C. Dulles Intl Airport averaging around $250.

Our data shows that Tuesday is the least expensive day to fly to Las Vegas. Tickets to fly out on this day can be as low as $358. Flights from Washington, D.C. Dulles Intl Airport to Las Vegas on a Thursday will generally be more expensive and average around $463. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

The cheapest time of day to fly to Las Vegas is in the morning when flights can be purchased for as low as $380. Flights to Las Vegas are more costly at noon, with an average ticket price of $607. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Washington, D.C. Dulles Intl to Las Vegas Harry Reid Intl for the best Washington, D.C. Dulles Intl - Las Vegas Harry Reid Intl flight prices

You are more likely to see cheaper flights to Las Vegas from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Las Vegas for around $416 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Las Vegas from Washington, D.C. Dulles Intl Airport for as low as $308 on momondo.

There are 4 cabin classes available to choose from on Washington, D.C. Dulles Intl to Las Vegas Harry Reid Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 28% on your flight if you consider stops on a Washington, D.C. Dulles Intl Airport to Las Vegas flight.

As of March 2026, prices for Washington, D.C. Dulles Intl Airport to Las Vegas flights are approximately 26% cheaper when compared to flights at the same time last year.

United Airlines and Alaska Airlines are the most popular carriers operating from Washington, D.C. Dulles Intl to Las Vegas Harry Reid Intl

United Airlines, Frontier and Southwest are the top three most popular airlines that fly to Las Vegas from Washington, D.C. Dulles Intl Airport according to our data. United Airlines is the first choice among our users, with 69% of people opting to fly with this airline when traveling to Las Vegas. Keep in mind that there are 7 different airlines that fly to Las Vegas on a routine basis, so you have a few additional options to choose from.

Historically, on average around 15% of flights between Washington, D.C. and Las Vegas have experienced a delay on any given week. The average delay length over the past 12 months has been 174 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 13% of their flights experiencing any sort of delay.

Atlanta (ATL) was the most common stop: 33% of momondo users choosing 1-stop flights on this route connected there.

Flights via Atlanta (ATL) offer the lowest average round-trip price of $244.

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 6h 35m.

Charlotte (CLT) has the shortest average layover time for this route: 1h 10m.

4 flights are operational daily from Washington, D.C. Dulles Intl Airport to Las Vegas as of March 2026. The most popular departure time for this route is 8:00AM, with 46% of flights per day taking off in the afternoon.

As of March 2026, there are 32 flights per week flying from Washington, D.C. Dulles Intl Airport to Las Vegas. The most common day of the week flights depart is Mon, with 19% of flights taking off on this day.