Cheap flights from Washington to Mountain States

View AU$139 flight on Tue, 21 Oct. 2025Opens in a new window

Popular airlines from Washington to Mountain States

  • American Airlines

    American Airlines

  • Delta

    Delta

  • United

    United

  • Alaska Airlines

    Alaska Airlines

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Cheap Flights from Washington (WAS) to Mountain States (DEN)

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.

American Airlines
Sat, 6 Sep. - Sat, 13 Sep.
DCA
Washington
LAS
Las Vegas
AU$279 Return, found 3 days ago
AU$279
Return
found 3 days ago
Select American Airlines flight, departing Sat, 6 Sep. from Washington to Las Vegas, returning Sat, 13 Sep., priced at AU$279 found 3 days ago
Delta
Thu, 4 Sep. - Wed, 10 Sep.
DCA
Washington
LAS
Las Vegas
AU$348 Return, found 20 hours ago
AU$348
Return
found 20 hours ago
Select Delta flight, departing Thu, 4 Sep. from Washington to Las Vegas, returning Wed, 10 Sep., priced at AU$348 found 20 hours ago
Alaska Airlines
Thu, 4 Sep. - Wed, 10 Sep.
DCA
Washington
LAS
Las Vegas
AU$354 Return, found 20 hours ago
AU$354
Return
found 20 hours ago
Select Alaska Airlines flight, departing Thu, 4 Sep. from Washington to Las Vegas, returning Wed, 10 Sep., priced at AU$354 found 20 hours ago
American Airlines
Mon, 18 Aug. - Tue, 26 Aug.
DCA
Washington
LAS
Las Vegas
AU$357 Return, found 1 day ago
AU$357
Return
found 1 day ago
Select American Airlines flight, departing Mon, 18 Aug. from Washington to Las Vegas, returning Tue, 26 Aug., priced at AU$357 found 1 day ago
Delta
Tue, 19 Aug. - Mon, 25 Aug.
DCA
Washington
DEN
Denver
AU$360 Return, found 1 day ago
AU$360
Return
found 1 day ago
Select Delta flight, departing Tue, 19 Aug. from Washington to Denver, returning Mon, 25 Aug., priced at AU$360 found 1 day ago
United
Tue, 19 Aug. - Mon, 25 Aug.
DCA
Washington
DEN
Denver
AU$376 Return, found 1 day ago
AU$376
Return
found 1 day ago
Select United flight, departing Tue, 19 Aug. from Washington to Denver, returning Mon, 25 Aug., priced at AU$376 found 1 day ago

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

September is typically the cheapest month to fly

From AU$148 - AU$285 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.