Flights from St. Louis to Mount Rainier

Cheapest flights from St. Louis

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Sep 18 - Wed, Sep 24

STL

Lambert-St. Louis Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$205 Roundtrip, found 4 days ago

$205

Roundtrip

found 4 days ago

Select Spirit Airlines flight, departing Thu, Sep 18 from Lambert-St. Louis Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Wed, Sep 24, priced at $205 found 4 days ago

Thu, Sep 18 - Sat, Sep 27

STL

Lambert-St. Louis Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$210 Roundtrip, found 4 days ago

$210

Roundtrip

found 4 days ago

Select Spirit Airlines flight, departing Thu, Sep 18 from Lambert-St. Louis Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Sat, Sep 27, priced at $210 found 4 days ago

Sun, Sep 21 - Sat, Sep 27

STL

Lambert-St. Louis Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$215 Roundtrip, found 4 days ago

$215

Roundtrip

found 4 days ago

Select Spirit Airlines flight, departing Sun, Sep 21 from Lambert-St. Louis Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Sat, Sep 27, priced at $215 found 4 days ago

Sun, Sep 21 - Wed, Sep 24

STL

Lambert-St. Louis Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$216 Roundtrip, found 4 days ago

$216

Roundtrip

found 4 days ago

Select Spirit Airlines flight, departing Sun, Sep 21 from Lambert-St. Louis Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Wed, Sep 24, priced at $216 found 4 days ago

Sun, Sep 21 - Wed, Sep 24

STL

Lambert-St. Louis Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$239 Roundtrip, found 4 days ago

$239

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Sun, Sep 21 from Lambert-St. Louis Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Wed, Sep 24, priced at $239 found 4 days ago

Sun, Sep 21 - Wed, Sep 24

STL

Lambert-St. Louis Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$243 Roundtrip, found 4 days ago

$243

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Sun, Sep 21 from Lambert-St. Louis Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Wed, Sep 24, priced at $243 found 4 days ago

Sun, Sep 21 - Wed, Sep 24

STL

Lambert-St. Louis Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$246 Roundtrip, found 4 days ago

$246

Roundtrip

found 4 days ago

Select Spirit Airlines flight, departing Sun, Sep 21 from Lambert-St. Louis Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Wed, Sep 24, priced at $246 found 4 days ago

Sun, Sep 21 - Wed, Sep 24

STL

Lambert-St. Louis Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$250 Roundtrip, found 4 days ago

$250

Roundtrip

found 4 days ago

Select Sun Country Airlines flight, departing Sun, Sep 21 from Lambert-St. Louis Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Wed, Sep 24, priced at $250 found 4 days ago

Sun, Aug 31 - Wed, Sep 3

STL

Lambert-St. Louis Intl.

DCA

Ronald Reagan Washington National

$253 Roundtrip, found 1 day ago

$253

Roundtrip

found 1 day ago

Select American Airlines flight, departing Sun, Aug 31 from Lambert-St. Louis Intl. to Ronald Reagan Washington National, returning Wed, Sep 3, priced at $253 found 1 day ago

Sun, Aug 31 - Wed, Sep 3

STL

Lambert-St. Louis Intl.

IAD

Washington Dulles Intl.

$263 Roundtrip, found 1 day ago

$263

Roundtrip

found 1 day ago

Select United flight, departing Sun, Aug 31 from Lambert-St. Louis Intl. to Washington Dulles Intl., returning Wed, Sep 3, priced at $263 found 1 day ago

Sun, Sep 21 - Wed, Sep 24

STL

Lambert-St. Louis Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$267 Roundtrip, found 4 days ago

$267

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Sun, Sep 21 from Lambert-St. Louis Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Wed, Sep 24, priced at $267 found 4 days ago

Sun, Sep 21 - Wed, Sep 24

STL

Lambert-St. Louis Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$269 Roundtrip, found 4 days ago

$269

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Sun, Sep 21 from Lambert-St. Louis Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Wed, Sep 24, priced at $269 found 4 days ago

Fri, Sep 5 - Sat, Sep 6

STL

Lambert-St. Louis Intl.

DCA

Ronald Reagan Washington National

$273 Roundtrip, found 1 day ago

$273

Roundtrip

found 1 day ago

Select Delta flight, departing Fri, Sep 5 from Lambert-St. Louis Intl. to Ronald Reagan Washington National, returning Sat, Sep 6, priced at $273 found 1 day ago

Sun, Aug 31 - Wed, Sep 3

STL

Lambert-St. Louis Intl.

IAD

Washington Dulles Intl.

$275 Roundtrip, found 1 day ago

$275

Roundtrip

found 1 day ago

Select United flight, departing Sun, Aug 31 from Lambert-St. Louis Intl. to Washington Dulles Intl., returning Wed, Sep 3, priced at $275 found 1 day ago

Sun, Sep 21 - Wed, Sep 24

STL

Lambert-St. Louis Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$279 Roundtrip, found 4 days ago

$279

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Sun, Sep 21 from Lambert-St. Louis Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Wed, Sep 24, priced at $279 found 4 days ago

Tue, Sep 23 - Sat, Sep 27

STL

Lambert-St. Louis Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$280 Roundtrip, found 4 days ago

$280

Roundtrip

found 4 days ago

Select Delta flight, departing Tue, Sep 23 from Lambert-St. Louis Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Sat, Sep 27, priced at $280 found 4 days ago

Sun, Aug 31 - Wed, Sep 3

STL

Lambert-St. Louis Intl.

IAD

Washington Dulles Intl.

$285 Roundtrip, found 1 day ago

$285

Roundtrip

found 1 day ago

Select United flight, departing Sun, Aug 31 from Lambert-St. Louis Intl. to Washington Dulles Intl., returning Wed, Sep 3, priced at $285 found 1 day ago

Mon, Sep 22 - Thu, Sep 25

STL

Lambert-St. Louis Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$287 Roundtrip, found 4 days ago

$287

Roundtrip

found 4 days ago

Select United flight, departing Mon, Sep 22 from Lambert-St. Louis Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Thu, Sep 25, priced at $287 found 4 days ago

Sun, Aug 31 - Wed, Sep 3

STL

Lambert-St. Louis Intl.

IAD

Washington Dulles Intl.

$292 Roundtrip, found 1 day ago

$292

Roundtrip

found 1 day ago

Select United flight, departing Sun, Aug 31 from Lambert-St. Louis Intl. to Washington Dulles Intl., returning Wed, Sep 3, priced at $292 found 1 day ago

Sun, Aug 31 - Wed, Sep 3

STL

Lambert-St. Louis Intl.

DCA

Ronald Reagan Washington National

$298 Roundtrip, found 1 day ago

$298

Roundtrip

found 1 day ago

Select United flight, departing Sun, Aug 31 from Lambert-St. Louis Intl. to Ronald Reagan Washington National, returning Wed, Sep 3, priced at $298 found 1 day ago