Cheap flights from Seattle to Mountain States

View AU$106 flight on Tue, 23 Sep. 2025Opens in a new window

Popular airlines from Seattle to Mountain States

  • Alaska Airlines

    Alaska Airlines

  • American Airlines

    American Airlines

  • Delta

    Delta

  • United

    United

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Cheap Flights from Seattle (SEA) 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.

Alaska Airlines
Wed, 27 Aug. - Sun, 31 Aug.
SEA
Seattle
BOI
Boise
AU$196 Return, found 2 days ago
AU$196
Return
found 2 days ago
Select Alaska Airlines flight, departing Wed, 27 Aug. from Seattle to Boise, returning Sun, 31 Aug., priced at AU$196 found 2 days ago
Delta
Wed, 27 Aug. - Sun, 31 Aug.
SEA
Seattle
BOI
Boise
AU$212 Return, found 2 days ago
AU$212
Return
found 2 days ago
Select Delta flight, departing Wed, 27 Aug. from Seattle to Boise, returning Sun, 31 Aug., priced at AU$212 found 2 days ago
Alaska Airlines
Tue, 12 Aug. - Fri, 15 Aug.
PAE
Seattle
LAS
Las Vegas
AU$213 Return, found 3 days ago
AU$213
Return
found 3 days ago
Select Alaska Airlines flight, departing Tue, 12 Aug. from Seattle to Las Vegas, returning Fri, 15 Aug., priced at AU$213 found 3 days ago
American Airlines
Thu, 4 Sep. - Thu, 11 Sep.
SEA
Seattle
LAS
Las Vegas
AU$335 Return, found 3 days ago
AU$335
Return
found 3 days ago
Select American Airlines flight, departing Thu, 4 Sep. from Seattle to Las Vegas, returning Thu, 11 Sep., priced at AU$335 found 3 days ago
United
Thu, 11 Dec. - Wed, 17 Dec.
SEA
Seattle
DEN
Denver
AU$364 Return, found 14 hours ago
AU$364
Return
found 14 hours ago
Select United flight, departing Thu, 11 Dec. from Seattle to Denver, returning Wed, 17 Dec., priced at AU$364 found 14 hours ago
Hawaiian Airlines
Mon, 4 Aug. - Tue, 12 Aug.
PAE
Seattle
LAS
Las Vegas
AU$373 Return, found 3 days ago
AU$373
Return
found 3 days ago
Select Hawaiian Airlines flight, departing Mon, 4 Aug. from Seattle to Las Vegas, returning Tue, 12 Aug., priced at AU$373 found 3 days ago

Find the cheapest month to fly from Seattle (SEA) to Las Vegas (LAS)

September is typically the cheapest month to fly

From AU$60 - AU$186 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.