Cheap flights from San Francisco to Southwest Illinois

View AU$248 flight on Mon, 15 Sep. 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.

United
Mon, 28 Jul. - Wed, 30 Jul.
SFO
San Francisco
STL
St. Louis
AU$1,204 Return, found 4 days ago
AU$1,204
Return
found 4 days ago
Select United flight, departing Mon, 28 Jul. from San Francisco to St. Louis, returning Wed, 30 Jul., priced at AU$1,204 found 4 days ago
American Airlines
Mon, 28 Jul. - Wed, 30 Jul.
SFO
San Francisco
STL
St. Louis
AU$1,209 Return, found 4 days ago
AU$1,209
Return
found 4 days ago
Select American Airlines flight, departing Mon, 28 Jul. from San Francisco to St. Louis, returning Wed, 30 Jul., priced at AU$1,209 found 4 days ago
United
Mon, 28 Jul. - Wed, 30 Jul.
SFO
San Francisco
STL
St. Louis
AU$1,214 Return, found 4 days ago
AU$1,214
Return
found 4 days ago
Select United flight, departing Mon, 28 Jul. from San Francisco to St. Louis, returning Wed, 30 Jul., priced at AU$1,214 found 4 days ago
United
Sun, 3 Aug. - Wed, 6 Aug.
SFO
San Francisco
STL
St. Louis
AU$1,217 Return, found 5 days ago
AU$1,217
Return
found 5 days ago
Select United flight, departing Sun, 3 Aug. from San Francisco to St. Louis, returning Wed, 6 Aug., priced at AU$1,217 found 5 days ago
Delta
Sun, 3 Aug. - Mon, 4 Aug.
SFO
San Francisco
STL
St. Louis
AU$1,228 Return, found 8 hours ago
AU$1,228
Return
found 8 hours ago
Select Delta flight, departing Sun, 3 Aug. from San Francisco to St. Louis, returning Mon, 4 Aug., priced at AU$1,228 found 8 hours ago
Alaska Airlines
Sun, 3 Aug. - Mon, 4 Aug.
SFO
San Francisco
STL
St. Louis
AU$1,376 Return, found 8 hours ago
AU$1,376
Return
found 8 hours ago
Select Alaska Airlines flight, departing Sun, 3 Aug. from San Francisco to St. Louis, returning Mon, 4 Aug., priced at AU$1,376 found 8 hours ago
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