PHX

$94 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 9/13. 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
8:10 pm - 7:11 amSTL  Lambert-St Louis-PHX Phoenix Sky Harbor Intl
13h 01m1 stop Denver Intl
Frontier Logo
8:16 am - 7:15 pmPHX  Phoenix Sky Harbor Intl-STL Lambert-St Louis
8h 59m1 stop Denver Intl
$193Frontier
Tue, Oct 20 - Fri, Oct 23
Frontier Logo
8:10 pm - 7:11 amSTL  Lambert-St Louis-PHX Phoenix Sky Harbor Intl
13h 01m1 stop Denver Intl
Frontier Logo
8:16 am - 7:15 pmPHX  Phoenix Sky Harbor Intl-STL Lambert-St Louis
8h 59m1 stop Denver Intl
$197Frontier
Sat, Sep 5 - Fri, Sep 11
Multiple Airlines Logo
9:20 pm - 5:52 pmORD  Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl
22h 32m1 stop Los Angeles Los Angeles
Multiple Airlines Logo
3:15 pm - 11:59 pmPHX  Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl
6h 44m1 stop San Diego
$246Multiple Airlines
Thu, Dec 3 - Mon, Dec 7
Multiple Airlines Logo
9:20 am - 4:00 pmORD  Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl
7h 40m1 stop San Diego
Multiple Airlines Logo
10:59 am - 9:21 pmPHX  Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl
9h 22m1 stop Denver Intl
$247Multiple Airlines
Sat, Sep 5 - Fri, Sep 11
Southwest Logo
5:40 am - 7:15 amMDW  Chicago Midway-PHX Phoenix Sky Harbor Intl
3h 35mnonstop
Southwest Logo
3:05 pm - 8:20 pmPHX  Phoenix Sky Harbor Intl-MDW Chicago Midway
3h 15mnonstop
$253Southwest
Sat, Sep 5 - Thu, Sep 10
Southwest Logo
12:40 pm - 2:15 pmMDW  Chicago Midway-PHX Phoenix Sky Harbor Intl
3h 35mnonstop
Southwest Logo
12:35 am - 5:50 amPHX  Phoenix Sky Harbor Intl-MDW Chicago Midway
3h 15mnonstop
$253Southwest
Sat, Sep 5 - Fri, Sep 11
American Airlines Logo
5:14 pm - 6:58 pmORD  Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl
3h 44mnonstop
American Airlines Logo
3:34 pm - 9:30 pmPHX  Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl
3h 56mnonstop
$253American Airlines
Sun, Sep 6 - Fri, Sep 11
American Airlines Logo
7:40 pm - 9:22 pmORD  Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl
3h 42mnonstop
American Airlines Logo
4:40 pm - 10:31 pmPHX  Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl
3h 51mnonstop
$253American Airlines
Sat, Sep 5 - Fri, Sep 11
United Airlines Logo
11:00 am - 12:56 pmORD  Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl
3h 56mnonstop
United Airlines Logo
7:10 am - 12:49 pmPHX  Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl
3h 39mnonstop
$253United Airlines
Sat, Sep 5 - Fri, Sep 11
United Airlines Logo
4:20 pm - 6:13 pmORD  Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl
3h 53mnonstop
United Airlines Logo
4:59 pm - 12:59 amPHX  Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl
6h 00m1 stop Houston George Bush Intcntl
$263United Airlines
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Good to know

Low season

July

Cheapest flight

$94
Best time to beat the crowds but there is an average 12% increase in price.
Most popular time to fly with an average 7% 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-Feb 2025
I think you should prebook food or bring your own food.
Verified travelerFlew with United Airlines-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)