PHX

$49 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 11/17. 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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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, Nov 5 - Fri, Nov 7
Frontier Logo
7:45 pm - 8:24 amSTL-PHX
13h 39m1 stop
Frontier Logo
8:43 pm - 9:07 amPHX-STL
11h 24m1 stop
$156Frontier
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Fri, Jan 9 - Sun, Jan 11
Frontier Logo
7:43 pm - 1:22 pmSTL-PHX
18h 39m2 stops
Frontier Logo
10:31 pm - 10:02 amPHX-STL
10h 31m1 stop
$157Frontier
Find Deal
Sat, Nov 1 - Sat, Nov 8
Multiple Airlines Logo
5:45 pm - 12:05 pmORD-PHX
20h 20m2 stops
Multiple Airlines Logo
10:57 am - 11:29 pmPHX-ORD
11h 32m1 stop
$163Multiple Airlines
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Fri, Feb 6 - Sat, Feb 7
Multiple Airlines Logo
7:53 pm - 10:59 pmORD-PHX
4h 06mnonstop
Multiple Airlines Logo
4:00 pm - 11:37 pmPHX-ORD
6h 37m1 stop
$165Multiple Airlines
Find Deal
Wed, Feb 18 - Wed, Feb 25
United Airlines Logo
7:15 am - 10:20 amORD-PHX
4h 05mnonstop
United Airlines Logo
6:31 pm - 10:59 pmPHX-ORD
3h 28mnonstop
$177United Airlines
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Wed, Dec 17 - Wed, Dec 24
American Airlines Logo
1:35 pm - 4:36 pmORD-PHX
4h 01mnonstop
American Airlines Logo
5:02 am - 9:40 amPHX-ORD
3h 38mnonstop
$188American Airlines
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Sun, Feb 8 - Sun, Feb 15
American Airlines Logo
7:05 am - 10:05 amORD-PHX
4h 00mnonstop
American Airlines Logo
5:00 am - 9:24 amPHX-ORD
3h 24mnonstop
$189American Airlines
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Mon, Nov 17 - Mon, Nov 24
United Airlines Logo
7:25 am - 10:23 amORD-PHX
3h 58mnonstop
United Airlines Logo
7:03 pm - 11:30 pmPHX-ORD
3h 27mnonstop
$195United Airlines
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Fri, Feb 6 - Mon, Feb 9
Southwest Logo
3:25 pm - 6:20 pmMDW-PHX
3h 55mnonstop
Southwest Logo
6:05 pm - 10:20 pmPHX-MDW
3h 15mnonstop
$201Southwest
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Tue, Dec 9 - Tue, Dec 16
Southwest Logo
8:35 am - 2:05 pmMDW-PHX
6h 30m2 stops
Southwest Logo
5:00 am - 9:15 amPHX-MDW
3h 15mnonstop
$202Southwest
Find Deal

Everything you should know

Cheapest round-trip
$156
Overall average: $336
Frontier
Wed 11/5Fri 11/7
STL - PHX • 1 stop
Cheapest non-stop
$156
Typical prices: $275-$470
Frontier
Fri 11/21Fri 11/28
STL - PHX • Non-stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Phoenix!
Useful Info

Good to know

Low seasonAugust
Cheapest flight$49
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 11% 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.

Traveling to a place near Phoenix?

Book flights to Phoenix if you plan to visit one of these locations
Paradise Valley
Globe
Cave Creek
Guadalupe
Morristown

Everything you need to know for your flight to Phoenix

Information on your arrival and departure airports

Phoenix (PHX)

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