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.

$77 CHEAP FLIGHTS from Illinois to Phoenix (PHX)

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Flight Deals

Cheap Flights from Illinois to Phoenix

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Illinois to Phoenix

Fri, Nov 6 - Sun, Nov 8

7:59 pm - 12:42 amSTL Lambert-St Louis-PHX Phoenix Sky Harbor Intl

5h 43m1 stop Denver Intl

5:01 am - 11:19 amPHX Phoenix Sky Harbor Intl-STL Lambert-St Louis

5h 18m1 stop Dallas/Fort Worth

$136Frontier

Wed, Nov 4 - Thu, Nov 12

4:18 pm - 12:42 amSTL Lambert-St Louis-PHX Phoenix Sky Harbor Intl

9h 24m1 stop Denver Intl

9:59 pm - 7:14 pmPHX Phoenix Sky Harbor Intl-STL Lambert-St Louis

20h 15m1 stop Denver Intl

$185Frontier

Thu, Nov 5 - Mon, Nov 9

2:15 pm - 11:27 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

10h 12m1 stop San Diego

7:32 pm - 5:13 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

8h 41m1 stop Las Vegas Harry Reid Intl

$249Multiple Airlines

Thu, Dec 10 - Mon, Dec 14

9:42 pm - 12:47 amORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

4h 05mnonstop

7:05 am - 5:01 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

8h 56m1 stop Seattle/Tacoma Intl

$250Multiple Airlines

Sat, Sep 26 - Sun, Sep 27

5:40 am - 7:15 amMDW Chicago Midway-PHX Phoenix Sky Harbor Intl

3h 35mnonstop

12:35 am - 5:50 amPHX Phoenix Sky Harbor Intl-MDW Chicago Midway

3h 15mnonstop

$253Southwest

Wed, Oct 21 - Fri, Oct 23

5:45 am - 7:30 amMDW Chicago Midway-PHX Phoenix Sky Harbor Intl

3h 45mnonstop

12:35 am - 5:45 amPHX Phoenix Sky Harbor Intl-MDW Chicago Midway

3h 10mnonstop

$253Southwest

Thu, Nov 5 - Mon, Nov 9

4:14 pm - 7:16 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

4h 02mnonstop

6:20 pm - 10:58 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 38mnonstop

$253United Airlines

Mon, Oct 26 - Thu, Oct 29

8:30 pm - 10:33 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

4h 03mnonstop

5:22 pm - 10:59 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 37mnonstop

$253United Airlines

Tue, Sep 29 - Tue, Oct 6

8:50 pm - 10:38 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 48mnonstop

8:48 am - 2:33 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 45mnonstop

$253American Airlines

Sat, Oct 24 - Sat, Oct 31

8:40 pm - 10:38 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 58mnonstop

8:48 am - 2:33 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 45mnonstop

$253American Airlines

Recent last minute flight deals from Illinois to Phoenix

Thu, Sep 3 - Mon, Oct 5

2:41 pm - 11:39 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

10h 58m1 stop Denver Intl

8:27 am - 5:38 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

19h 11m1 stop Las Vegas Harry Reid Intl

$273Frontier

Sat, Sep 5 - Sat, Sep 5

6:54 pm - 8:36 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 42mnonstop

12:20 am - 6:00 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 40mnonstop

$300American Airlines

Sat, Sep 5 - Sat, Sep 5

3:54 pm - 8:37 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

6h 43m1 stop Dallas/Fort Worth

12:20 am - 6:00 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 40mnonstop

$309American Airlines

Sat, Sep 5 - Sun, Sep 20

9:20 pm - 5:52 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

22h 32m1 stop Los Angeles

3:21 pm - 12:23 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

7h 02m1 stop Denver Intl

$316Frontier

Fri, Sep 4 - Thu, Sep 10

9:20 pm - 5:52 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

22h 32m1 stop Los Angeles

3:15 pm - 11:59 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

6h 44m1 stop San Diego

$318Multiple Airlines

Fri, Sep 4 - Thu, Sep 10

9:20 pm - 5:52 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

22h 32m1 stop Los Angeles

3:15 pm - 11:59 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

6h 44m1 stop San Diego

$319Multiple Airlines

Sat, Sep 5 - Sun, Sep 6

9:24 am - 1:50 pmMDW Chicago Midway-PHX Phoenix Sky Harbor Intl

6h 26m1 stop Detroit Metropolitan Wayne County

5:45 am - 3:44 pmPHX Phoenix Sky Harbor Intl-MDW Chicago Midway

7h 59m1 stop Atlanta Hartsfield-Jackson

$325Delta

Sat, Sep 5 - Sun, Sep 6

9:24 am - 1:50 pmMDW Chicago Midway-PHX Phoenix Sky Harbor Intl

6h 26m1 stop Detroit Metropolitan Wayne County

7:05 am - 3:44 pmPHX Phoenix Sky Harbor Intl-MDW Chicago Midway

6h 39m1 stop Atlanta Hartsfield-Jackson

$325Delta

Sat, Sep 5 - Sun, Sep 6

4:26 pm - 8:24 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

5h 58m1 stop Denver Intl

4:49 pm - 11:59 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

5h 10m1 stop Denver Intl

$325United Airlines

Sat, Sep 5 - Sun, Sep 6

1:30 pm - 5:10 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

5h 40m1 stop Denver Intl

4:49 pm - 11:59 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

5h 10m1 stop Denver Intl

$325United Airlines

Recent direct flight deals from Illinois to Phoenix

Fri, Dec 11 - Mon, Dec 14

9:42 pm - 12:47 amORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

4h 05mnonstop

3:45 pm - 8:22 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 37mnonstop

$246Frontier

Thu, Oct 22 - Sun, Oct 25

4:20 pm - 6:27 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

4h 07mnonstop

7:32 pm - 12:59 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 27mnonstop

$247Frontier

Mon, Oct 12 - Mon, Oct 19

4:20 pm - 6:27 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

4h 07mnonstop

7:32 pm - 12:59 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 27mnonstop

$247Frontier

Mon, Oct 26 - Thu, Oct 29

8:30 pm - 10:33 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

4h 03mnonstop

5:22 pm - 10:59 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 37mnonstop

$253United Airlines

Sat, Oct 17 - Mon, Oct 19

8:30 pm - 10:24 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 54mnonstop

7:10 am - 12:49 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 39mnonstop

$253United Airlines

Mon, Oct 19 - Sat, Oct 24

10:45 pm - 12:44 amORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 59mnonstop

5:57 pm - 11:30 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 33mnonstop

$253American Airlines

Tue, Sep 29 - Tue, Oct 6

8:50 pm - 10:38 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 48mnonstop

8:48 am - 2:33 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 45mnonstop

$253American Airlines

Sat, Sep 26 - Sun, Sep 27

5:40 am - 7:15 amMDW Chicago Midway-PHX Phoenix Sky Harbor Intl

3h 35mnonstop

12:35 am - 5:50 amPHX Phoenix Sky Harbor Intl-MDW Chicago Midway

3h 15mnonstop

$253Southwest

Mon, Oct 26 - Thu, Oct 29

5:40 am - 7:25 amMDW Chicago Midway-PHX Phoenix Sky Harbor Intl

3h 45mnonstop

8:05 am - 1:25 pmPHX Phoenix Sky Harbor Intl-MDW Chicago Midway

3h 20mnonstop

$253Southwest

Tue, Sep 29 - Tue, Oct 6

10:06 am - 12:03 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 57mnonstop

11:52 pm - 5:20 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 28mnonstop

$253United Airlines

Useful Info

Low season	July
High season	March
Cheapest flight	$77

Best time to beat the crowds but there is an average 11% increase in price.

Most popular time to fly with an average 8% increase in price.

Flight from St. Louis to Phoenix Sky Harbor Airport

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

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.

Paradise Valley

Globe

Cave Creek

Guadalupe

Morristown

Everything you need to know for your flight to Phoenix

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Complete your trip

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Information on your arrival and departure airports

Phoenix (PHX)

PHX

$77 Find Cheap Flights from Illinois to Phoenix - Compare and Save

Cheap Flights from Illinois to Phoenix

Recent round-trip flight deals from Illinois to Phoenix

Recent one-way flight deals from Illinois to Phoenix

Recent last minute flight deals from Illinois to Phoenix

Recent direct flight deals from Illinois to Phoenix

Good to know

Low season

High season

Cheapest flight

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

FAQs for booking Illinois to Phoenix flights

Traveling to a place near Phoenix?

Everything you need to know for your flight to Phoenix

Information on your arrival and departure airports

Cabin class types available on flights to Phoenix

Complete your trip to Phoenix with a hotel stay or car rental

Find direct flights for Phoenix

Flights to other popular destinations

Flights from domestic origins to Illinois

Choose which airport to fly into in Phoenix

Find deals for your return flight