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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

$49 CHEAP FLIGHTS from Illinois to Phoenix (PHX)

PHX

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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.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Illinois to Phoenix

Fri, Oct 24 - Mon, Oct 27

10:59 pm - 12:21 amSTL-PHX

3h 22mnonstop

2:27 pm - 7:26 pmPHX-STL

2h 59mnonstop

$73Frontier

Find Deal

Fri, Oct 10 - Mon, Oct 13

10:59 pm - 12:21 amSTL-PHX

3h 22mnonstop

2:27 pm - 7:26 pmPHX-STL

2h 59mnonstop

$76Frontier

Find Deal

Thu, Sep 18 - Sun, Sep 21

2:07 pm - 4:11 pmORD-PHX

4h 04mnonstop

12:01 pm - 10:48 pmPHX-ORD

8h 47m1 stop

$150

Find Deal

Thu, Sep 25 - Sun, Sep 28

8:12 pm - 7:50 amORD-PHX

13h 38m1 stop

5:06 pm - 10:40 pmPHX-ORD

3h 34mnonstop

$151

Find Deal

Wed, Oct 22 - Sat, Oct 25

7:31 am - 9:05 amSTL-PHX

3h 34mnonstop

3:25 pm - 8:27 pmPHX-STL

3h 02mnonstop

$161American Airlines

Find Deal

Fri, Oct 31 - Thu, Nov 6

7:15 pm - 9:00 pmMDW-PHX

3h 45mnonstop

5:20 am - 9:35 amPHX-MDW

3h 15mnonstop

$196Southwest

Find Deal

Tue, Oct 21 - Thu, Oct 30

8:45 pm - 10:05 pmSTL-PHX

3h 20mnonstop

6:55 pm - 11:50 pmPHX-STL

2h 55mnonstop

$196Southwest

Find Deal

Thu, Nov 6 - Tue, Nov 11

2:29 pm - 5:05 pmSTL-PHX

3h 36mnonstop

7:54 pm - 11:50 pmPHX-STL

2h 56mnonstop

$211American Airlines

Find Deal

Tue, Sep 9 - Tue, Sep 30

10:49 am - 2:39 pmPIA-PHX

5h 50m1 stop

11:42 am - 10:15 pmPHX-PIA

8h 33m2 stops

$256United Airlines

Find Deal

Thu, Sep 4 - Tue, Sep 9

9:00 am - 12:28 pmMLI-PHX

5h 28m1 stop

6:00 am - 4:54 pmPHX-MLI

8h 54m2 stops

$274United Airlines

Find Deal

Useful Info

Low season	June
High season	March
Cheapest flight	$49

Best time to beat the crowds but there is an average 5% increase in price.

Most popular time to fly with an average 12% increase in price.

Flight from Chicago O'Hare Airport to Phoenix Sky Harbor Airport

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

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

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on your arrival and departure airports

Phoenix (PHX)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.

PHX

$49 Find Cheap Flights from Illinois to Phoenix

KAYAK searches hundreds of travel sites at once for deals on flights to Phoenix Sky Harbor Intl Airport

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

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

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?

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