Cheap flights from St. Louis to Western United States

View AU$137 flight on Sat, 16 Aug. 2025Opens in a new window

Popular airlines from St. Louis to Western United States

  • American Airlines

    American Airlines

  • Alaska Airlines

    Alaska Airlines

  • Delta

    Delta

  • United

    United

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Cheap Flights from St. Louis (STL) to Western United States (QLA)

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.

Delta
Sat, 16 Aug. - Mon, 18 Aug.
STL
St. Louis
DEN
Denver
AU$304 Return, found 3 days ago
AU$304
Return
found 3 days ago
Select Delta flight, departing Sat, 16 Aug. from St. Louis to Denver, returning Mon, 18 Aug., priced at AU$304 found 3 days ago
United
Sat, 16 Aug. - Mon, 18 Aug.
STL
St. Louis
DEN
Denver
AU$328 Return, found 3 days ago
AU$328
Return
found 3 days ago
Select United flight, departing Sat, 16 Aug. from St. Louis to Denver, returning Mon, 18 Aug., priced at AU$328 found 3 days ago
American Airlines
Sat, 16 Aug. - Mon, 18 Aug.
STL
St. Louis
DEN
Denver
AU$331 Return, found 3 days ago
AU$331
Return
found 3 days ago
Select American Airlines flight, departing Sat, 16 Aug. from St. Louis to Denver, returning Mon, 18 Aug., priced at AU$331 found 3 days ago
American Airlines
Sun, 31 Aug. - Sun, 7 Sep.
STL
St. Louis
DEN
Denver
AU$332 Return, found 5 days ago
AU$332
Return
found 5 days ago
Select American Airlines flight, departing Sun, 31 Aug. from St. Louis to Denver, returning Sun, 7 Sep., priced at AU$332 found 5 days ago
United
Sat, 16 Aug. - Mon, 18 Aug.
STL
St. Louis
DEN
Denver
AU$343 Return, found 3 days ago
AU$343
Return
found 3 days ago
Select United flight, departing Sat, 16 Aug. from St. Louis to Denver, returning Mon, 18 Aug., priced at AU$343 found 3 days ago
Alaska Airlines
Tue, 17 Feb. - Sat, 28 Feb.
STL
St. Louis
LAX
Los Angeles
AU$481 Return, found 5 days ago
AU$481
Return
found 5 days ago
Select Alaska Airlines flight, departing Tue, 17 Feb. from St. Louis to Los Angeles, returning Sat, 28 Feb., priced at AU$481 found 5 days ago

Find the cheapest month to fly from St. Louis (STL) to Los Angeles (LAX)

February is typically the cheapest month to fly

From AU$184 - AU$682 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.