Cheap flights from Phoenix to Central Illinois

View AU$181 flight on Wed, 20 Aug. 2025Opens in a new window

Popular airlines from Phoenix to Central 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 Phoenix (PHX) to Central 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.

Frontier Airlines
Thu, 21 Aug. - Sun, 24 Aug.
PHX
Phoenix
MDW
Chicago
AU$297 Return, found 2 hours ago
AU$297
Return
found 2 hours ago
Select Frontier Airlines flight, departing Thu, 21 Aug. from Phoenix to Chicago, returning Sun, 24 Aug., priced at AU$297 found 2 hours ago
Delta
Mon, 25 Aug. - Fri, 29 Aug.
PHX
Phoenix
MDW
Chicago
AU$361 Return, found 1 hour ago
AU$361
Return
found 1 hour ago
Select Delta flight, departing Mon, 25 Aug. from Phoenix to Chicago, returning Fri, 29 Aug., priced at AU$361 found 1 hour ago
Delta
Sat, 16 Aug. - Sat, 23 Aug.
PHX
Phoenix
MDW
Chicago
AU$362 Return, found 4 days ago
AU$362
Return
found 4 days ago
Select Delta flight, departing Sat, 16 Aug. from Phoenix to Chicago, returning Sat, 23 Aug., priced at AU$362 found 4 days ago
American Airlines
Sun, 2 Nov. - Wed, 5 Nov.
PHX
Phoenix
STL
St. Louis
AU$453 Return, found 4 hours ago
AU$453
Return
found 4 hours ago
Select American Airlines flight, departing Sun, 2 Nov. from Phoenix to St. Louis, returning Wed, 5 Nov., priced at AU$453 found 4 hours ago
United
Sat, 1 Nov. - Tue, 4 Nov.
PHX
Phoenix
PIA
Peoria
AU$504 Return, found 4 hours ago
AU$504
Return
found 4 hours ago
Select United flight, departing Sat, 1 Nov. from Phoenix to Peoria, returning Tue, 4 Nov., priced at AU$504 found 4 hours ago
Alaska Airlines
Sun, 2 Nov. - Wed, 5 Nov.
PHX
Phoenix
STL
St. Louis
AU$520 Return, found 4 hours ago
AU$520
Return
found 4 hours ago
Select Alaska Airlines flight, departing Sun, 2 Nov. from Phoenix to St. Louis, returning Wed, 5 Nov., priced at AU$520 found 4 hours ago

Find the cheapest month to fly from Phoenix (PHX) to Springfield (SPI)

September is typically the cheapest month to fly

From AU$572 - AU$1,006 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.