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Cheap Flights from Seattle to Mascoutah (SEA-STL)
Prices were available within the past 7 days and start at $59 for one-way flights and $118 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Mon, Dec 9 - Tue, Dec 17
SEA
Seattle
STL
St. Louis
$118 Roundtrip, just found
$118
Roundtrip
just found
Thu, Oct 31 - Sun, Nov 3
SEA
Seattle
STL
St. Louis
$134 Roundtrip, found 8 hours ago
$134
Roundtrip
found 8 hours ago
Sat, Nov 2 - Sun, Nov 10
SEA
Seattle
STL
St. Louis
$138 Roundtrip, just found
$138
Roundtrip
just found
Tue, Dec 10 - Wed, Dec 11
SEA
Seattle
STL
St. Louis
$171 Roundtrip, found 15 hours ago
$171
Roundtrip
found 15 hours ago
Tue, Nov 12 - Wed, Nov 20
SEA
Seattle
STL
St. Louis
$176 Roundtrip, just found
$176
Roundtrip
just found
Thu, Oct 17 - Tue, Oct 22
SEA
Seattle
STL
St. Louis
$192 Roundtrip, found 4 hours ago
$192
Roundtrip
found 4 hours ago
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