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.

$83 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

Tue, Oct 27 - Fri, Dec 4

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

3h 45mnonstop

1:05 pm - 5:20 pmPHX Phoenix Sky Harbor Intl-MDW Chicago Midway

3h 15mnonstop

$253Southwest

Fri, Nov 6 - Tue, Nov 10

9:45 pm - 12:40 amMDW Chicago Midway-PHX Phoenix Sky Harbor Intl

3h 55mnonstop

1:35 am - 5:45 amPHX Phoenix Sky Harbor Intl-MDW Chicago Midway

3h 10mnonstop

$253Southwest

Fri, Oct 9 - Tue, Oct 13

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

3h 59mnonstop

7:04 pm - 12:35 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 31mnonstop

$253American Airlines

Mon, Oct 12 - Sat, Oct 17

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

3h 59mnonstop

5:30 am - 11:05 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 35mnonstop

$253American Airlines

Thu, Dec 10 - Fri, Dec 18

11:38 am - 2:37 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 59mnonstop

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

3h 37mnonstop

$253Frontier

Fri, Nov 20 - Wed, Nov 25

11:35 am - 2:40 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

4h 05mnonstop

6:00 am - 10:30 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 30mnonstop

$253Frontier

Fri, Oct 30 - Sat, Oct 31

11:08 am - 1:14 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

4h 06mnonstop

11:20 am - 5:00 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 40mnonstop

$253United Airlines

Wed, Jan 27 - Fri, Feb 5

4:12 pm - 7:17 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

4h 05mnonstop

6:30 pm - 11:04 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 34mnonstop

$253United Airlines

Mon, Jan 4 - Sat, Jan 9

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

4h 05mnonstop

12:08 pm - 11:59 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

10h 51m1 stop Seattle/Tacoma Intl

$253Multiple Airlines

Tue, Oct 6 - Tue, Dec 8

6:30 am - 2:17 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

9h 47m1 stop Denver Intl

7:00 am - 5:49 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

9h 49m1 stop Seattle/Tacoma Intl

$254Multiple Airlines

Recent last minute flight deals from Illinois to Phoenix

Fri, Sep 25 - Sun, Oct 11

8:55 pm - 10:47 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

27h 52m1 stop Las Vegas Harry Reid Intl

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

3h 27mnonstop

$296Frontier

Tue, Sep 22 - Sat, Oct 17

12:17 pm - 11:59 amSTL Lambert-St Louis-PHX Phoenix Sky Harbor Intl

25h 42m1 stop Las Vegas Harry Reid Intl

6:15 am - 6:57 pmPHX Phoenix Sky Harbor Intl-STL Lambert-St Louis

10h 42m1 stop Denver Intl

$315Frontier

Tue, Sep 22 - Sat, Oct 17

1:55 pm - 3:30 pmMDW Chicago Midway-PHX Phoenix Sky Harbor Intl

3h 35mnonstop

6:25 am - 11:40 amPHX Phoenix Sky Harbor Intl-MDW Chicago Midway

3h 15mnonstop

$382Southwest

Tue, Sep 22 - Sat, Oct 17

10:10 am - 1:00 pmMDW Chicago Midway-PHX Phoenix Sky Harbor Intl

4h 50m1 stop Omaha Eppley Airfield

6:25 am - 11:40 amPHX Phoenix Sky Harbor Intl-MDW Chicago Midway

3h 15mnonstop

$388Southwest

Tue, Sep 22 - Tue, Sep 29

6:00 am - 3:10 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

11h 10m1 stop Seattle/Tacoma Intl

3:15 pm - 1:22 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

20h 07m1 stop San Diego

$421Alaska Airlines

Wed, Sep 23 - Sat, Sep 26

8:00 am - 4:42 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

10h 42m1 stop Seattle/Tacoma Intl

7:49 pm - 1:22 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

15h 33m1 stop San Diego

$421Alaska Airlines

Wed, Sep 23 - Sat, Sep 26

7:11 am - 11:58 amMLI Moline Quad-City-PHX Phoenix Sky Harbor Intl

6h 47m1 stop Dallas/Fort Worth

3:17 pm - 11:18 pmPHX Phoenix Sky Harbor Intl-MLI Moline Quad-City

6h 01m1 stop Dallas/Fort Worth

$425American Airlines

Wed, Sep 23 - Sat, Sep 26

7:11 am - 11:58 amMLI Moline Quad-City-PHX Phoenix Sky Harbor Intl

6h 47m1 stop Dallas/Fort Worth

1:14 pm - 11:18 pmPHX Phoenix Sky Harbor Intl-MLI Moline Quad-City

8h 04m1 stop Dallas/Fort Worth

$425American Airlines

Tue, Sep 22 - Wed, Sep 30

8:00 am - 3:10 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

9h 10m1 stop Seattle/Tacoma Intl

8:39 pm - 5:38 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

6h 59m1 stop Las Vegas Harry Reid Intl

$446Multiple Airlines

Sat, Sep 26 - Mon, Sep 28

2:18 pm - 7:07 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

6h 49m1 stop San Diego

3:22 pm - 12:45 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

7h 23m1 stop Dallas/Fort Worth

$446Multiple Airlines

Recent direct flight deals from Illinois to Phoenix

Fri, Nov 6 - Tue, Nov 10

9:45 pm - 12:40 amMDW Chicago Midway-PHX Phoenix Sky Harbor Intl

3h 55mnonstop

1:35 am - 5:45 amPHX Phoenix Sky Harbor Intl-MDW Chicago Midway

3h 10mnonstop

$253Southwest

Fri, Oct 16 - Mon, Oct 19

10:55 pm - 12:45 amMDW Chicago Midway-PHX Phoenix Sky Harbor Intl

3h 50mnonstop

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

3h 10mnonstop

$253Southwest

Fri, Oct 9 - Tue, Oct 13

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

3h 59mnonstop

7:04 pm - 12:35 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 31mnonstop

$253American Airlines

Mon, Oct 12 - Sat, Oct 17

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

3h 59mnonstop

5:30 am - 11:05 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 35mnonstop

$253American Airlines

Thu, Dec 10 - Fri, Dec 18

11:38 am - 2:37 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 59mnonstop

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

3h 37mnonstop

$253Frontier

Fri, Nov 20 - Wed, Nov 25

11:35 am - 2:40 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

4h 05mnonstop

6:00 am - 10:30 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 30mnonstop

$253Frontier

Fri, Oct 30 - Sat, Oct 31

11:08 am - 1:14 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

4h 06mnonstop

11:20 am - 5:00 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 40mnonstop

$253United Airlines

Wed, Jan 27 - Fri, Feb 5

4:12 pm - 7:17 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

4h 05mnonstop

6:30 pm - 11:04 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 34mnonstop

$253United Airlines

Tue, Oct 27 - Fri, Dec 4

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

3h 45mnonstop

1:05 pm - 5:20 pmPHX Phoenix Sky Harbor Intl-MDW Chicago Midway

3h 15mnonstop

$253Southwest

Mon, Oct 5 - Wed, Oct 7

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

3h 58mnonstop

12:36 am - 5:59 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 23mnonstop

$267American Airlines

Useful Info

Low season	July
High season	March
Cheapest flight	$83

Best time to beat the crowds but there is an average 10% increase in price.

Most popular time to fly with an average 5% 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.