PHX

$81 Find Cheap Flights from Illinois to Phoenix - Compare and Save

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 10/13. 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, 0 bags

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Flight Deals

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

Tue, Oct 13 - Tue, Oct 20
Frontier Logo
5:19 pm - 10:13 am
STL
-
PHX
18h 54m
1 stop
Frontier Logo
5:55 pm - 7:15 pm
PHX
-
STL
23h 20m
2 stops
$196Frontier
Tue, Oct 13 - Mon, Oct 19
Frontier Logo
5:19 pm - 10:13 am
STL
-
PHX
18h 54m
1 stop
Frontier Logo
8:16 am - 7:15 pm
PHX
-
STL
8h 59m
1 stop
$199Frontier
Thu, Aug 6 - Wed, Aug 12
American Airlines Logo
10:35 pm - 12:14 am
ORD
-
PHX
3h 39mnonstop
American Airlines Logo
6:47 pm - 12:28 am
PHX
-
ORD
3h 41mnonstop
$246American Airlines
Thu, Aug 6 - Wed, Aug 12
American Airlines Logo
7:40 pm - 9:22 pm
ORD
-
PHX
3h 42mnonstop
American Airlines Logo
5:05 am - 10:52 am
PHX
-
ORD
3h 47mnonstop
$247American Airlines
Wed, Aug 12 - Sat, Aug 15
Southwest Logo
5:20 pm - 7:00 pm
MDW
-
PHX
3h 40mnonstop
Southwest Logo
3:00 pm - 8:15 pm
PHX
-
MDW
3h 15mnonstop
$250Southwest
Sat, Sep 5 - Wed, Sep 9
Southwest Logo
5:40 am - 7:15 am
MDW
-
PHX
3h 35mnonstop
Southwest Logo
10:35 am - 5:10 pm
PHX
-
MDW
4h 35m
1 stop
$251Southwest
Sat, Aug 29 - Tue, Sep 1
United Airlines Logo
8:07 pm - 9:59 pm
ORD
-
PHX
3h 52mnonstop
United Airlines Logo
1:34 pm - 9:29 pm
PHX
-
ORD
5h 55m
1 stop
$255United Airlines
Sun, Sep 20 - Wed, Sep 30
Multiple Airlines Logo
1:13 pm - 4:50 pm
MLI
-
PHX
29h 37m
1 stop
Multiple Airlines Logo
10:55 pm - 12:15 pm
PHX
-
MLI
11h 20m
1 stop
$266Multiple Airlines
Thu, Oct 22 - Wed, Oct 28
Multiple Airlines Logo
12:35 pm - 9:35 pm
MLI
-
PHX
11h 00m
1 stop
Multiple Airlines Logo
10:40 pm - 11:45 am
PHX
-
MLI
11h 05m
1 stop
$292Multiple Airlines
Wed, Sep 23 - Tue, Sep 29
United Airlines Logo
8:13 am - 3:16 pm
MLI
-
PHX
9h 03m
2 stops
United Airlines Logo
1:33 pm - 8:48 pm
PHX
-
MLI
5h 15m
1 stop
$304United Airlines
Useful Info

Good to know

Low season

July

Cheapest flight

$81
Best time to beat the crowds but there is an average 9% increase in price.
Most popular time to fly with an average 8% 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 SWISS
ORD
-
PHX
Feb 2025
I think you should prebook food or bring your own food.
Verified travelerFlew with United Airlines
ORD
-
PHX
Apr 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)