PHX

$78 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 9/1. 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

Wed, Aug 5 - Wed, Aug 12
Frontier Logo
4:57 pm - 10:16 pm
STL
-
PHX
7h 19m
1 stop
Frontier Logo
11:17 am - 7:23 pm
PHX
-
STL
6h 06m
1 stop
$207Frontier
Tue, Aug 11 - Thu, Aug 13
Frontier Logo
3:41 pm - 10:59 pm
STL
-
PHX
9h 18m
1 stop
Frontier Logo
6:24 am - 2:56 pm
PHX
-
STL
6h 32m
1 stop
$217Frontier
Wed, Aug 5 - Tue, Aug 11
American Airlines Logo
8:00 am - 9:18 am
STL
-
PHX
3h 18mnonstop
American Airlines Logo
12:30 pm - 5:37 pm
PHX
-
STL
3h 07mnonstop
$243American Airlines
Tue, Aug 11 - Thu, Aug 13
Southwest Logo
8:45 pm - 9:55 pm
STL
-
PHX
3h 10mnonstop
Southwest Logo
6:55 pm - 11:50 pm
PHX
-
STL
2h 55mnonstop
$244Southwest
Tue, Aug 4 - Tue, Aug 11
American Airlines Logo
2:46 pm - 4:00 pm
STL
-
PHX
3h 14mnonstop
American Airlines Logo
12:30 pm - 5:37 pm
PHX
-
STL
3h 07mnonstop
$249American Airlines
Thu, Nov 26 - Sat, Nov 28
United Airlines Logo
1:05 pm - 6:09 pm
ORD
-
PHX
6h 04m
1 stop
United Airlines Logo
6:20 pm - 10:56 pm
PHX
-
ORD
3h 36mnonstop
$261United Airlines
Sat, Aug 15 - Tue, Aug 25
Southwest Logo
10:05 am - 2:45 pm
MDW
-
PHX
6h 40m
2 stops
Southwest Logo
10:35 am - 5:10 pm
PHX
-
MDW
4h 35m
1 stop
$263Southwest
Tue, Aug 11 - Sat, Aug 15
Delta Logo
6:00 am - 12:08 pm
MLI
-
PHX
8h 08m
1 stop
Delta Logo
1:30 pm - 10:19 pm
PHX
-
MLI
6h 49m
1 stop
$299Delta
Fri, Aug 7 - Sun, Aug 9
United Airlines Logo
8:15 am - 12:26 pm
MLI
-
PHX
6h 11m
1 stop
United Airlines Logo
6:50 am - 3:05 pm
PHX
-
MLI
6h 15m
1 stop
$329United Airlines
Fri, Jul 31 - Sat, Aug 8
Delta Logo
6:00 am - 12:03 pm
BMI
-
PHX
8h 03m
1 stop
Delta Logo
5:45 am - 3:41 pm
PHX
-
BMI
7h 56m
1 stop
$329Delta
Useful Info

Good to know

Low seasonJune
Cheapest flight$78
Best time to beat the crowds but there is an average 16% increase in price.
Most popular time to fly with an average 10% 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)