Cheap Flights from Washington (IAD) to Las Vegas (LAS)

View AU$176 flight on Sun, 24 Aug. 2025Opens in a new window

Popular airlines from Washington Dulles International Airport (IAD) to Harry Reid Intl. Airport (LAS)

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Cheap Flights from Washington (IAD) to Las Vegas (LAS)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, 6 Sep. - Sat, 13 Sep.
IAD
Washington
LAS
Las Vegas
AU$393 Return, found 6 days ago
AU$393
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 6 Sep. from Washington to Las Vegas, returning Sat, 13 Sep., priced at AU$393 found 6 days ago
Delta
Sat, 6 Sep. - Sat, 13 Sep.
IAD
Washington
LAS
Las Vegas
AU$394 Return, found 6 days ago
AU$394
Return
found 6 days ago
Select Delta flight, departing Sat, 6 Sep. from Washington to Las Vegas, returning Sat, 13 Sep., priced at AU$394 found 6 days ago
United
Sat, 6 Sep. - Sat, 13 Sep.
IAD
Washington
LAS
Las Vegas
AU$413 Return, found 6 days ago
AU$413
Return
found 6 days ago
Select United flight, departing Sat, 6 Sep. from Washington to Las Vegas, returning Sat, 13 Sep., priced at AU$413 found 6 days ago
United
Sat, 6 Sep. - Sat, 13 Sep.
IAD
Washington
LAS
Las Vegas
AU$414 Return, found 6 days ago
AU$414
Return
found 6 days ago
Select United flight, departing Sat, 6 Sep. from Washington to Las Vegas, returning Sat, 13 Sep., priced at AU$414 found 6 days ago
Delta
Sat, 6 Sep. - Sat, 13 Sep.
IAD
Washington
LAS
Las Vegas
AU$440 Return, found 6 days ago
AU$440
Return
found 6 days ago
Select Delta flight, departing Sat, 6 Sep. from Washington to Las Vegas, returning Sat, 13 Sep., priced at AU$440 found 6 days ago
United
Sat, 6 Sep. - Sat, 13 Sep.
IAD
Washington
LAS
Las Vegas
AU$459 Return, found 6 days ago
AU$459
Return
found 6 days ago
Select United flight, departing Sat, 6 Sep. from Washington to Las Vegas, returning Sat, 13 Sep., priced at AU$459 found 6 days ago
Delta
Sat, 6 Sep. - Sat, 13 Sep.
IAD
Washington
LAS
Las Vegas
AU$471 Return, found 6 days ago
AU$471
Return
found 6 days ago
Select Delta flight, departing Sat, 6 Sep. from Washington to Las Vegas, returning Sat, 13 Sep., priced at AU$471 found 6 days ago
Alaska Airlines
Fri, 12 Sep. - Fri, 19 Sep.
IAD
Washington
LAS
Las Vegas
AU$472 Return, found 11 hours ago
AU$472
Return
found 11 hours ago
Select Alaska Airlines flight, departing Fri, 12 Sep. from Washington to Las Vegas, returning Fri, 19 Sep., priced at AU$472 found 11 hours ago
Alaska Airlines
Fri, 12 Sep. - Fri, 19 Sep.
IAD
Washington
LAS
Las Vegas
AU$473 Return, found 11 hours ago
AU$473
Return
found 11 hours ago
Select Alaska Airlines flight, departing Fri, 12 Sep. from Washington to Las Vegas, returning Fri, 19 Sep., priced at AU$473 found 11 hours ago
American Airlines
Thu, 4 Sep. - Wed, 10 Sep.
IAD
Washington
LAS
Las Vegas
AU$558 Return, found 4 days ago
AU$558
Return
found 4 days ago
Select American Airlines flight, departing Thu, 4 Sep. from Washington to Las Vegas, returning Wed, 10 Sep., priced at AU$558 found 4 days ago

Find the cheapest month to fly from Washington (IAD) to Las Vegas (LAS)

May is typically the cheapest month to fly

From AU$172 - AU$739 per traveller.

Graph displaying average flight prices per month

Flight from Washington to Las Vegas route information
Origin airport
Washington Dulles Intl.
Destination airport
Harry Reid Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Return price
AU$393
Distance
3297 km
Average flight time
2 hours 41 mins

Your quick guide to flights from Washington to Las Vegas

Pick up great flights from Washington to Las Vegas

With Expedia, you have your pick of flights a day with 20 airlines covering flights from Washington to Las Vegas. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Washington to Las Vegas that take around hours.

Find cheap flights from Washington to Las Vegas

From the great flight deals with prices currently ranging from AU$393 to AU$558, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Washington to Las Vegas around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Las Vegas is normally in September.

Reasons to book your flight from Washington to Las Vegas with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Washington to Las Vegas across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Las Vegas right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Frequently asked questions

How much is a flight from Dulles Intl. Airport to Harry Reid Airport (formerly McCarran Airport)?
If you're planning on travelling from IAD to Harry Reid Airport (formerly McCarran Airport), round-trip journeys start from AU$393. This figure is based on fares available within the last 7 days on Expedia for flights departing within the next year, so don't let a good deal pass you by. Book today and save yourself money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Washington Dulles Intl. Airport (IAD) to Harry Reid Airport (formerly McCarran Airport)?
The majority of flights can be cancelled online, but every airline has different terms and conditions. If you do need to cancel your flight, go to our Customer Service Portal and follow the instructions.
How do I find cheap flights from Washington Dulles Intl. Airport (IAD) to LAS that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Dulles Intl. Airport to LAS flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Washington Dulles Intl. Airport (IAD) to LAS?
Expect to be up above the clouds for a while, as the flight distance from Washington Dulles Intl. Airport (IAD) to LAS is 3 300 kilometres. Put together a playlist of your favourite podcasts before leaving home to keep yourself entertained during your trip.
Which airlines fly direct from Washington Dulles Intl. Airport (IAD) to LAS?
Check out the deals on offer with United Airlines (UA) if you want to travel directly from IAD to LAS. This popular carrier offers 60 flights every month, so you're sure to find one that fits your travel schedule.
Are IAD to LAS flight tickets cheaper when they're purchased at the last minute?
Last-minute bookings from Dulles Intl. Airport to LAS can be hit-or-miss. You may be able to find a bargain, but then again, you could miss out entirely! If you'd prefer to play it safe and start your trip planning early, Expedia compares flight deals up to a year in advance. Just bear in mind that not all airlines release their prices so far in advance. Our top tip? Check back often as updates are made frequently.

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