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.

$70 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, Oct 30 - Tue, Nov 3

8:10 pm - 11:37 amSTL Lambert-St Louis-PHX Phoenix Sky Harbor Intl

17h 27m1 stop Denver Intl

8:05 am - 10:39 pmPHX Phoenix Sky Harbor Intl-STL Lambert-St Louis

13h 34m1 stop Las Vegas Harry Reid Intl

$161Frontier

Fri, Oct 30 - Mon, Nov 2

8:10 pm - 11:37 amSTL Lambert-St Louis-PHX Phoenix Sky Harbor Intl

17h 27m1 stop Denver Intl

10:06 am - 7:15 pmPHX Phoenix Sky Harbor Intl-STL Lambert-St Louis

8h 09m1 stop Denver Intl

$163Frontier

Thu, Sep 17 - Sun, Sep 20

6:00 am - 1:06 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

9h 06m1 stop Dallas/Fort Worth

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

15h 33m1 stop San Diego

$246Multiple Airlines

Wed, Sep 30 - Sun, Oct 4

6:30 am - 12:35 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

8h 05m1 stop Denver Intl

11:59 pm - 7:35 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

17h 36m2 stops Minneapolis St Paul Dallas/Fort Worth

$249Multiple Airlines

Thu, Sep 10 - Tue, Sep 15

11:00 am - 12:56 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 56mnonstop

4:26 pm - 10:05 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 39mnonstop

$253United Airlines

Tue, Nov 10 - Thu, Nov 12

11:08 am - 2:14 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

4h 06mnonstop

9:55 am - 2:35 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 40mnonstop

$253United Airlines

Thu, Oct 1 - Sat, Oct 17

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

3h 48mnonstop

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

3h 31mnonstop

$253American Airlines

Sat, Sep 19 - Tue, Sep 22

10:33 am - 12:20 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 47mnonstop

5:08 am - 10:49 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 41mnonstop

$253American Airlines

Tue, Oct 6 - Thu, Oct 8

8:45 pm - 10:30 pmMDW Chicago Midway-PHX Phoenix Sky Harbor Intl

3h 45mnonstop

6:55 pm - 12:10 amPHX Phoenix Sky Harbor Intl-MDW Chicago Midway

3h 15mnonstop

$253Southwest

Wed, Sep 30 - Wed, Oct 7

8:20 pm - 10:00 pmMDW Chicago Midway-PHX Phoenix Sky Harbor Intl

3h 40mnonstop

4:35 pm - 9:50 pmPHX Phoenix Sky Harbor Intl-MDW Chicago Midway

3h 15mnonstop

$253Southwest

Recent last minute flight deals from Illinois to Phoenix

Mon, Aug 24 - Sat, Sep 12

8:11 pm - 12:59 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

18h 48m1 stop Las Vegas Harry Reid Intl

6:25 am - 12:23 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

15h 58m1 stop Denver Intl

$273Frontier

Sat, Aug 22 - Wed, Aug 26

11:45 am - 6:31 pmMDW Chicago Midway-PHX Phoenix Sky Harbor Intl

8h 46m1 stop Atlanta Hartsfield-Jackson

12:19 pm - 10:47 pmPHX Phoenix Sky Harbor Intl-MDW Chicago Midway

8h 28m1 stop Atlanta Hartsfield-Jackson

$299Frontier

Sun, Aug 23 - Sun, Sep 20

8:11 pm - 12:48 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

18h 37m1 stop Las Vegas Harry Reid Intl

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

15h 33m1 stop San Diego

$355Multiple Airlines

Sat, Aug 22 - Wed, Aug 26

2:41 pm - 9:28 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

8h 47m1 stop Denver Intl

6:39 pm - 6:20 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

9h 41m1 stop Seattle/Tacoma Intl

$381Multiple Airlines

Mon, Aug 24 - Sat, Sep 12

4:20 pm - 6:13 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 53mnonstop

2:21 pm - 8:00 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 39mnonstop

$397United Airlines

Mon, Aug 24 - Sat, Sep 12

1:50 pm - 3:25 pmMDW Chicago Midway-PHX Phoenix Sky Harbor Intl

3h 35mnonstop

3:00 pm - 8:15 pmPHX Phoenix Sky Harbor Intl-MDW Chicago Midway

3h 15mnonstop

$397Southwest

Mon, Aug 24 - Sat, Sep 12

8:00 am - 11:50 amMDW Chicago Midway-PHX Phoenix Sky Harbor Intl

5h 50m1 stop Louisville Intl

3:00 pm - 8:15 pmPHX Phoenix Sky Harbor Intl-MDW Chicago Midway

3h 15mnonstop

$403Southwest

Mon, Aug 24 - Sat, Sep 12

4:20 pm - 6:13 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 53mnonstop

6:09 am - 2:50 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

6h 41m1 stop Houston George Bush Intcntl

$407United Airlines

Sun, Aug 23 - Sun, Sep 20

10:35 pm - 12:14 amORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 39mnonstop

3:34 pm - 9:30 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 56mnonstop

$434American Airlines

Sat, Aug 22 - Wed, Aug 26

5:00 am - 6:33 amORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 33mnonstop

5:05 am - 10:52 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 47mnonstop

$441American Airlines

Recent direct flight deals from Illinois to Phoenix

Thu, Nov 12 - Sun, Nov 15

4:00 pm - 6:59 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 59mnonstop

8:04 pm - 12:33 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 29mnonstop

$245Frontier

Thu, Oct 29 - Sun, Nov 1

4:00 pm - 5:59 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 59mnonstop

8:04 pm - 12:33 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 29mnonstop

$245Frontier

Thu, Nov 5 - Sun, Nov 8

4:00 pm - 6:59 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 59mnonstop

8:04 pm - 12:33 amPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 29mnonstop

$245Frontier

Thu, Sep 10 - Tue, Sep 15

11:00 am - 12:56 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 56mnonstop

4:26 pm - 10:05 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 39mnonstop

$253United Airlines

Tue, Oct 6 - Sat, Oct 10

3:40 pm - 5:35 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

3h 55mnonstop

9:00 am - 2:44 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 44mnonstop

$253United Airlines

Sat, Oct 17 - Fri, Oct 23

6:59 pm - 8:57 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

$253American Airlines

Sat, Oct 24 - Wed, Oct 28

6:48 am - 8:55 amORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

4h 07mnonstop

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

3h 35mnonstop

$253American Airlines

Thu, Nov 26 - Mon, Nov 30

3:40 pm - 6:35 pmMDW 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

Thu, Oct 1 - Sun, Oct 4

9:25 pm - 11:10 pmMDW 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

Tue, Nov 10 - Thu, Nov 12

11:08 am - 2:14 pmORD Chicago O'Hare Intl-PHX Phoenix Sky Harbor Intl

4h 06mnonstop

9:55 am - 2:35 pmPHX Phoenix Sky Harbor Intl-ORD Chicago O'Hare Intl

3h 40mnonstop

$253United Airlines

Useful Info

Low season	July
High season	March
Cheapest flight	$70

Best time to beat the crowds but there is an average 14% increase in price.

Most popular time to fly with an average 7% 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

$70 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