Cheap flights from Pittsburgh to Southern Illinois

View AU$249 flight on Fri, 17 Oct. 2025Opens in a new window

Popular airlines from Pittsburgh to Southern Illinois

  • Jetstar

    Jetstar

  • Qantas Airways

    Qantas Airways

  • Virgin Australia

    Virgin Australia

  • Scoot

    Scoot

  • American Airlines

    American Airlines

  • Emirates

    Emirates

  • United

    United

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Cheap Flights from Pittsburgh (PIT) to Southern 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.

American Airlines
Fri, 17 Oct. - Mon, 20 Oct.
PIT
Pittsburgh
STL
St. Louis
AU$498 Return, just found
AU$498
Return
just found
Select American Airlines flight, departing Fri, 17 Oct. from Pittsburgh to St. Louis, returning Mon, 20 Oct., priced at AU$498 just found
Delta
Fri, 17 Oct. - Mon, 20 Oct.
PIT
Pittsburgh
STL
St. Louis
AU$498 Return, just found
AU$498
Return
just found
Select Delta flight, departing Fri, 17 Oct. from Pittsburgh to St. Louis, returning Mon, 20 Oct., priced at AU$498 just found
Delta
Fri, 17 Oct. - Sun, 19 Oct.
PIT
Pittsburgh
STL
St. Louis
AU$516 Return, just found
AU$516
Return
just found
Select Delta flight, departing Fri, 17 Oct. from Pittsburgh to St. Louis, returning Sun, 19 Oct., priced at AU$516 just found
American Airlines
Fri, 17 Oct. - Mon, 20 Oct.
PIT
Pittsburgh
STL
St. Louis
AU$531 Return, just found
AU$531
Return
just found
Select American Airlines flight, departing Fri, 17 Oct. from Pittsburgh to St. Louis, returning Mon, 20 Oct., priced at AU$531 just found
Delta
Fri, 17 Oct. - Sun, 19 Oct.
PIT
Pittsburgh
STL
St. Louis
AU$535 Return, just found
AU$535
Return
just found
Select Delta flight, departing Fri, 17 Oct. from Pittsburgh to St. Louis, returning Sun, 19 Oct., priced at AU$535 just found
United
Fri, 17 Oct. - Mon, 20 Oct.
PIT
Pittsburgh
STL
St. Louis
AU$544 Return, just found
AU$544
Return
just found
Select United flight, departing Fri, 17 Oct. from Pittsburgh to St. Louis, returning Mon, 20 Oct., priced at AU$544 just found
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