Expect long security queues at IAD, especially in the afternoon. Plan extra time to navigate the terminals efficiently.

Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $201 (Kiwi.com) |
One-way from | $118 (Cheapflightsfares) |
Popular in | March |
Cheapest in | August |
Average price | $452 |
Good round-trip deal | $369 or less |
Good one-way deal | $222 or less |
Fly from
Fly to
Route
Depart
Return
Price
Washington, D.C.Las Vegas
IAD - LAS
IADLAS
Washington, D.C. Dulles Intl
Wed 2/11
5:26 pm-10:31 pm
1 stop8h 05m
Las Vegas Harry Reid Intl
Sat 2/14
6:00 am-5:27 pm
1 stop8h 27m
Washington, D.C.Las Vegas
IAD - LAS
IADLAS
Washington, D.C. Dulles Intl
Sun 2/15
5:50 pm-8:27 pm
Nonstop5h 37m
Las Vegas Harry Reid Intl
Wed 2/18
12:59 am-11:21 am
1 stop7h 22m
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
Washington, D.C.Las Vegas
IAD - LAS
IADLAS
Washington, D.C. Dulles Intl
Thu 1/15
7:36 pm-9:57 pm
Nonstop5h 21m
Las Vegas Harry Reid Intl
Sun 1/18
7:06 pm-7:14 am
1 stop9h 08m
Washington, D.C.Las Vegas
IAD - LAS
IADLAS
Washington, D.C. Dulles Intl
Sat 2/7
5:26 pm-2:41 pm
2 stops24h 15m
Las Vegas Harry Reid Intl
Mon 2/9
7:52 pm-5:04 pm
1 stop18h 12m
Washington, D.C.Las Vegas
IAD - LAS
IADLAS
Washington, D.C. Dulles Intl
Tue 1/6
7:33 am-11:50 pm
2 stops19h 17m
Las Vegas Harry Reid Intl
Sat 1/10
6:00 am-5:04 pm
1 stop8h 04m
Washington, D.C.Las Vegas
IAD - LAS
IADLAS
Washington, D.C. Dulles Intl
Tue 2/17
5:45 pm-8:22 pm
Nonstop5h 37m
Las Vegas Harry Reid Intl
Tue 2/24
7:40 am-6:06 pm
1 stop7h 26m
Washington, D.C.Las Vegas
IAD - LAS
IADLAS
Washington, D.C. Dulles Intl
Thu 2/5
7:30 am-3:00 pm
1 stop10h 30m
Las Vegas Harry Reid Intl
Mon 2/9
11:00 am-11:10 pm
1 stop9h 10m
Washington, D.C.Las Vegas
IAD - LAS
IADLAS
Washington, D.C. Dulles Intl
Wed 12/31
12:32 pm-5:51 pm
1 stop8h 19m
Las Vegas Harry Reid Intl
Tue 1/6
11:00 am-11:10 pm
1 stop9h 10m
Washington, D.C.Las Vegas
IAD - LAS
IADLAS
Washington, D.C. Dulles Intl
Sun 1/18
8:30 am-10:57 am
Nonstop5h 27m
| 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 Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
The price you pay for your flight from Washington, D.C. Dulles Intl Airport to Las Vegas may vary depending on when you book. For the best chance of a lower fare, look to book 20 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Currently, June is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Las Vegas (average of $119). Flying from Washington, D.C. Dulles Intl Airport to Las Vegas in March is currently the most expensive (average of $309). 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.
One of the essential ways to save on airfare from Washington, D.C. Dulles Intl Airport to Las Vegas is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 24% on airfare.
Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Las Vegas flight should consider departing on Saturday mornings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
About 17% of weekly flights between Washington, D.C. and Las Vegas have experienced delays in the past year, with the average delay time being 179 minutes.
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving at night 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, American Airlines have had the lowest number of delays on this route, with no flights being classified as delayed.
San Diego (SAN) – chosen by Cheapflights users on 50% of 1-stop itineraries from Washington, D.C. Dulles Intl Airport to Las Vegas on Cheapflights.
Atlanta (ATL) is the most affordable 1-stop option, with an average round-trip price of $184.
Flights via Atlanta (ATL) have the shortest average one-way travel time for 1-stop routes: 7h 51m.
Flights via Denver (DEN) offer the fastest connection on this route, with an average layover time of 2h 26m.
Comfort
Crew
Entertainment
Overall
Boarding
Food
Reviews
Mike,Aug 2025
OKC - AUS
Comfort
Crew
Entertainment
Overall
Boarding
Food
Reviews
Mike,Aug 2025
OKC - AUS
Comfort
Crew
Entertainment
Overall
Boarding
Food
Reviews
Mike,Aug 2025
OKC - AUS
Comfort
Crew
Entertainment
Overall
Boarding
Food
Reviews
Mike,Aug 2025
OKC - AUS
Comfort
Crew
Entertainment
Overall
Boarding
Food
Reviews
Mike,Aug 2025
OKC - AUS
Comfort
Crew
Entertainment
Overall
Boarding
Food
Reviews
Mike,Aug 2025
OKC - AUS
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$91 | Average$293 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$120 | Average$207 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$231 | Average$307 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$236 | Average$450 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$256 | Average$483 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$256 | Average$365 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$368 | Average$499 | FlexibilityNo cancel fee | On-time71% |