Cheap flights from San Francisco to Southwest Illinois

View AU$246 flight on Mon, 18 Aug. 2025Opens in a new window

Popular airlines from San Francisco to Southwest Illinois

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    United

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Cheap Flights from San Francisco (SJC) to Southwest Illinois (STL)

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
Mon, 18 Aug. - Wed, 27 Aug.
SFO
San Francisco
STL
St. Louis
AU$483 Return, found 4 hours ago
AU$483
Return
found 4 hours ago
Select Delta flight, departing Mon, 18 Aug. from San Francisco to St. Louis, returning Wed, 27 Aug., priced at AU$483 found 4 hours ago
American Airlines
Mon, 18 Aug. - Wed, 27 Aug.
SFO
San Francisco
STL
St. Louis
AU$508 Return, found 4 hours ago
AU$508
Return
found 4 hours ago
Select American Airlines flight, departing Mon, 18 Aug. from San Francisco to St. Louis, returning Wed, 27 Aug., priced at AU$508 found 4 hours ago
Delta
Mon, 18 Aug. - Wed, 27 Aug.
SFO
San Francisco
STL
St. Louis
AU$536 Return, found 4 hours ago
AU$536
Return
found 4 hours ago
Select Delta flight, departing Mon, 18 Aug. from San Francisco to St. Louis, returning Wed, 27 Aug., priced at AU$536 found 4 hours ago
Delta
Mon, 18 Aug. - Wed, 27 Aug.
SFO
San Francisco
STL
St. Louis
AU$537 Return, found 4 hours ago
AU$537
Return
found 4 hours ago
Select Delta flight, departing Mon, 18 Aug. from San Francisco to St. Louis, returning Wed, 27 Aug., priced at AU$537 found 4 hours ago
United
Mon, 18 Aug. - Wed, 27 Aug.
SFO
San Francisco
STL
St. Louis
AU$570 Return, found 4 hours ago
AU$570
Return
found 4 hours ago
Select United flight, departing Mon, 18 Aug. from San Francisco to St. Louis, returning Wed, 27 Aug., priced at AU$570 found 4 hours ago
Alaska Airlines
Mon, 18 Aug. - Wed, 27 Aug.
SFO
San Francisco
STL
St. Louis
AU$664 Return, found 4 hours ago
AU$664
Return
found 4 hours ago
Select Alaska Airlines flight, departing Mon, 18 Aug. from San Francisco to St. Louis, returning Wed, 27 Aug., priced at AU$664 found 4 hours ago
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