PHX

$64 Find Cheap Flights from Illinois to Phoenix

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Phoenix departing on 9/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

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Cheap Flights from Illinois to Phoenix

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to Phoenix that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Illinois to Phoenix

Thu, Aug 7 - Sat, Aug 9
Spirit Airlines Logo
10:47 am - 10:34 pmSTL-PHX
13h 47m1 stop
Spirit Airlines Logo
11:34 pm - 9:52 amPHX-STL
8h 18m1 stop
$159Spirit Airlines
Find Deal
Sat, Nov 8 - Sat, Nov 15
Spirit Airlines Logo
6:00 am - 12:17 pmORD-PHX
7h 17m1 stop
Spirit Airlines Logo
1:12 pm - 11:43 pmPHX-ORD
9h 31m1 stop
$164Spirit Airlines
Find Deal
Sat, Oct 18 - Wed, Oct 22
Logo
6:51 am - 11:43 amORD-PHX
6h 52m1 stop
Logo
12:12 pm - 11:43 pmPHX-ORD
9h 31m1 stop
$165
Find Deal
Thu, Sep 11 - Sun, Sep 14
Frontier Logo
2:54 pm - 4:54 pmORD-PHX
4h 00mnonstop
Frontier Logo
5:51 pm - 11:25 pmPHX-ORD
3h 34mnonstop
$195Frontier
Find Deal
Thu, Sep 4 - Sun, Sep 7
Frontier Logo
2:54 pm - 4:54 pmORD-PHX
4h 00mnonstop
Frontier Logo
5:51 pm - 11:25 pmPHX-ORD
3h 34mnonstop
$196Frontier
Find Deal
Sat, Aug 16 - Tue, Aug 19
Southwest Logo
5:20 am - 7:00 amMDW-PHX
3h 40mnonstop
Southwest Logo
5:40 pm - 11:00 pmPHX-MDW
3h 20mnonstop
$199Southwest
Find Deal
Wed, Aug 13 - Sat, Aug 16
United Airlines Logo
1:34 pm - 3:22 pmORD-PHX
3h 48mnonstop
United Airlines Logo
11:09 pm - 4:42 amPHX-ORD
3h 33mnonstop
$199United Airlines
Find Deal
Thu, Sep 11 - Sun, Sep 14
Logo
7:00 pm - 11:16 pmORD-PHX
6h 16m1 stop
Logo
5:51 pm - 11:25 pmPHX-ORD
3h 34mnonstop
$205
Find Deal
Sat, Aug 23 - Mon, Sep 1
Southwest Logo
10:50 am - 12:25 pmMDW-PHX
3h 35mnonstop
Southwest Logo
5:20 am - 10:35 amPHX-MDW
3h 15mnonstop
$208Southwest
Find Deal
Sat, Aug 2 - Wed, Aug 13
United Airlines Logo
8:05 pm - 9:55 pmORD-PHX
3h 50mnonstop
United Airlines Logo
11:09 pm - 4:42 amPHX-ORD
3h 33mnonstop
$218United Airlines
Find Deal
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Good to know

Low seasonJune
High seasonMarch
Cheapest flight$64
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly with an average 15% increase in price.
Flight from St. Louis to Phoenix Sky Harbor Airport

Flights from Illinois to Phoenix: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Illinois to Phoenix 
Learn how KAYAK collects reviews and tips from users.
JanieFlew with SWISSORD-PHXFeb 2025
I think you should prebook food or bring your own food.
Verified travelerFlew with United AirlinesORD-PHXApr 2024
Use the find my gate feature on the flights phone app if available as the airport is a bit confusing

FAQs for booking Illinois to Phoenix flights

  • How does KAYAK find such low prices on flights from Illinois to Phoenix?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Phoenix.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Phoenix?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Phoenix from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Illinois to Phoenix?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Phoenix with an airline and back to Illinois with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Phoenix?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Phoenix from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight to Phoenix

Information on your arrival and departure airports

Phoenix (PHX)

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