At IAD, check-in can be crowded in the afternoon and evening. Arrive early to navigate the busy main terminal efficiently.

Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $162 (Kiwi.com) |
One-way from | $67 (Kiwi.com) |
Popular in | December |
Cheapest in | August |
Average price | $388 |
Good round-trip deal | $337 or less |
Good one-way deal | $193 or less |
Fly from
Fly to
Route
Depart
Return
Price
Washington, D.C.Las Vegas
DCA - LAS
DCALAS
Washington, D.C. Reagan-National
Sun 1/18
8:59 am-3:35 pm
1 stop9h 36m
Las Vegas Harry Reid Intl
Tue 1/20
8:10 am-9:00 pm
1 stop9h 50m
Washington, D.C.Las Vegas
DCA - LAS
DCALAS
Washington, D.C. Reagan-National
Sun 2/15
4:11 pm-8:31 pm
1 stop7h 20m
Las Vegas Harry Reid Intl
Tue 2/17
12:59 am-11:35 am
1 stop7h 36m
Washington, D.C.Las Vegas
DCA - LAS
DCALAS
Washington, D.C. Reagan-National
Sun 1/18
4:11 pm-8:32 pm
1 stop7h 21m
Las Vegas Harry Reid Intl
Mon 1/19
12:30 am-9:58 am
1 stop6h 28m
BaltimoreLas Vegas
BWI - LAS
BWILAS
Baltimore/Washington
Fri 1/9
12:12 pm-11:43 pm
1 stop14h 31m
Las Vegas Harry Reid Intl
Sun 1/11
9:59 pm-9:16 am
1 stop8h 17m
Washington, D.C.Las Vegas
IAD - LAS
IADLAS
Washington, D.C. Dulles Intl
Sat 1/10
5:26 pm-10:31 pm
1 stop8h 05m
Las Vegas Harry Reid Intl
Mon 1/12
6:00 am-5:04 pm
1 stop8h 04m
BaltimoreLas Vegas
BWI - LAS
BWILAS
Baltimore/Washington
Sun 2/15
6:08 pm-11:55 pm
1 stop8h 47m
Las Vegas Harry Reid Intl
Wed 2/18
12:59 am-11:30 am
1 stop7h 31m
BaltimoreLas Vegas
BWI - LAS
BWILAS
Baltimore/Washington
Thu 1/29
11:45 am-6:05 pm
1 stop9h 20m
Las Vegas Harry Reid Intl
Mon 2/2
12:10 pm-11:26 pm
1 stop8h 16m
BaltimoreLas Vegas
BWI - LAS
BWILAS
Baltimore/Washington
Wed 2/18
10:30 am-6:00 pm
2 stops10h 30m
Las Vegas Harry Reid Intl
Sat 2/21
10:41 am-8:53 pm
1 stop7h 12m
Washington, D.C.Las Vegas
DCA - LAS
DCALAS
Washington, D.C. Reagan-National
Tue 1/13
9:59 am-10:00 pm
2 stops15h 01m
Las Vegas Harry Reid Intl
Thu 1/15
8:10 am-9:00 pm
1 stop9h 50m
Washington, D.C.Las Vegas
DCA - LAS
DCALAS
Washington, D.C. Reagan-National
Tue 1/13
9:59 am-10:00 pm
2 stops15h 01m
Las Vegas Harry Reid Intl
Tue 1/20
8:10 am-9:00 pm
1 stop9h 50m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars |
Booking 23 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. to Las Vegas. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to Las Vegas (average of $99). Flying from Washington, D.C. to Las Vegas in December is currently the most expensive (average of $162). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
A simple way to save on the total cost of your ticket is to fly from Washington, D.C. to Las Vegas in the morning. If you’re flexible enough to do this you can expect to save up to 14% on your trip compared to booking a flight in the afternoon.
Travelers seeking maximum savings on their Washington, D.C. to Las Vegas flight should consider departing on Saturday mornings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from WAS to LAS are scheduled on a Saturday (8 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (3 on average).
Denver (DEN) – chosen by Cheapflights users on 75% of 1-stop itineraries from Washington, D.C. to Las Vegas on Cheapflights.
Atlanta (ATL) is the most affordable 1-stop option, with an average round-trip price of $184.
Flights via Chicago (ORD) have the shortest average one-way travel time for 1-stop routes: 7h 34m.
Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 1h 59m.
About 19% of weekly flights between Washington, D.C. and Las Vegas have experienced delays in the past year, with the average delay time being 167 minutes.
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
Saturday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.
Over the last year, Delta have had the lowest number of delays on this route, with no flights being classified as delayed.
Comfort
Boarding
Overall
Entertainment
Food
Crew
Reviews
Mike,Aug 2025
OKC - AUS
Comfort
Boarding
Overall
Entertainment
Food
Crew
Reviews
Mike,Aug 2025
OKC - AUS
Comfort
Boarding
Overall
Entertainment
Food
Crew
Reviews
Mike,Aug 2025
OKC - AUS
Comfort
Boarding
Overall
Entertainment
Food
Crew
Reviews
Mike,Aug 2025
OKC - AUS
Comfort
Boarding
Overall
Entertainment
Food
Crew
Reviews
Mike,Aug 2025
OKC - AUS
Comfort
Boarding
Overall
Entertainment
Food
Crew
Reviews
Mike,Aug 2025
OKC - AUS
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$111 | Average$259 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$120 | Average$236 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$183 | Average$379 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$220 | Average$507 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$231 | Average$308 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$240 | Average$453 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$240 | Average$482 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$253 | Average$366 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$290 | Average$375 | FlexibilityNo cancel fee | On-time83% |