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$48+ Cheap flights from Illinois to Phoenix

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PHX
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Illinois to Phoenix

Keep the following information in mind while searching for Illinois to Phoenix flight deals. Data was last updated October 30, 2025.

Round-trip from

$145
(Kiwi.com)

One-way from

$48
(Kiwi.com)

Popular in

March

Cheapest in

August

Average price

$268
From Illinois to Phoenix
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One-way flight from Illinois to Phoenix
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Highest demand for flights based on searches. 5% potential increase in price ($15 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Illinois to Phoenix

Cheapest flights from Illinois to Phoenix
Explore the most affordable flight options available from Illinois to Phoenix. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/283:53 pmSTL - PHX
Nonstop3h 33mFrontier
Fri 12/510:26 pmPHX - STL
1 stop10h 48mFrontier
Deal found 10/29$147
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/283:53 pmSTL - PHX
Nonstop3h 33mFrontier
Wed 12/37:43 pmPHX - STL
1 stop15h 29mFrontier
Deal found 10/29$148
This Frontier deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/132:42 pmSTL - PHX
1 stop9h 47mFrontier
Mon 11/177:01 amPHX - STL
1 stop12h 11mFrontier
Deal found 10/29$150
This CheapOair deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/107:43 pmSTL - PHX
1 stop13h 23mFrontier
Fri 12/127:25 amPHX - STL
Nonstop2h 57mFrontier
Deal found 10/29$152
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/13:53 pmSTL - PHX
Nonstop3h 33mFrontier
Wed 12/34:32 pmPHX - STL
2 stops17h 35mFrontier
Deal found 10/29$155
This Frontier deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/167:02 pmSTL - PHX
1 stop6h 11mFrontier
Mon 11/177:25 amPHX - STL
Nonstop2h 59mFrontier
Deal found 10/28$156
This Frontier deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1712:09 pmSTL - PHX
Nonstop3h 22mFrontier
Fri 11/2111:14 amPHX - STL
Nonstop2h 54mFrontier
Deal found 10/28$158
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/57:43 pmSTL - PHX
1 stop13h 23mFrontier
Tue 12/94:32 pmPHX - STL
1 stop16h 42mFrontier
Deal found 10/29$159
This Priceline deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1012:09 pmSTL - PHX
Nonstop3h 22mFrontier
Sat 11/158:00 amPHX - STL
1 stop6h 56mFrontier
Deal found 10/29$161
This CheapOair deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/76:30 amMDW - PHX
1 stop17h 33mFrontier
Wed 11/121:16 pmPHX - MDW
1 stop21h 14mFrontier
Deal found 10/28$162
This CheapOair deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/54:38 pmORD - PHX
1 stop9h 02mFrontier
Mon 12/89:16 amPHX - ORD
1 stop13h 56mFrontier
Deal found 10/28$162
This CheapOair deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/137:45 pmSTL - PHX
1 stop13h 39mFrontier
Sun 11/169:35 amPHX - STL
1 stop27h 22mFrontier
Deal found 10/29$162

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Phoenix that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from Illinois to Phoenix that are best for you.

Fly from

Illinois

Fly to

Phoenix

Route

Depart

Return

Price

ChicagoPhoenix

RFD - AZA

RFDAZA

Chicago Greater Rockford

Fri 1/23

6:16 pm-9:00 pm

Nonstop3h 44m

Phoenix-Mesa Gateway

Fri 2/6

1:21 pm-5:26 pm

Nonstop3h 05m

$164

ChicagoPhoenix

RFD - AZA

RFDAZA

Chicago Greater Rockford

Mon 1/26

6:16 pm-9:00 pm

Nonstop3h 44m

Phoenix-Mesa Gateway

Wed 2/11

9:00 am-1:00 pm

Nonstop3h 00m

$167

ChicagoPhoenix

RFD - AZA

RFDAZA

Chicago Greater Rockford

Fri 1/9

6:16 pm-9:00 pm

Nonstop3h 44m

Phoenix-Mesa Gateway

Fri 1/16

1:21 pm-5:26 pm

Nonstop3h 05m

$168

ChicagoPhoenix

RFD - AZA

RFDAZA

Chicago Greater Rockford

Wed 11/12

8:04 pm-10:34 pm

Nonstop3h 30m

Phoenix-Mesa Gateway

Fri 11/14

1:45 pm-5:50 pm

Nonstop3h 05m

$181

ChicagoPhoenix

RFD - AZA

RFDAZA

Chicago Greater Rockford

Fri 1/9

6:16 pm-9:00 pm

Nonstop3h 44m

Phoenix-Mesa Gateway

Wed 1/21

9:10 am-1:15 pm

Nonstop3h 05m

$181

ChicagoPhoenix

RFD - AZA

RFDAZA

Chicago Greater Rockford

Mon 11/3

8:40 pm-11:11 pm

Nonstop3h 31m

Phoenix-Mesa Gateway

Wed 11/5

3:09 pm-7:14 pm

Nonstop3h 05m

$191

ChicagoPhoenix

RFD - AZA

RFDAZA

Chicago Greater Rockford

Wed 11/12

8:04 pm-10:34 pm

Nonstop3h 30m

Phoenix-Mesa Gateway

Fri 11/21

7:10 am-11:15 am

Nonstop3h 05m

$197

ChicagoPhoenix

RFD - AZA

RFDAZA

Chicago Greater Rockford

Mon 1/26

6:16 pm-9:00 pm

Nonstop3h 44m

Phoenix-Mesa Gateway

Mon 2/2

1:21 pm-5:26 pm

Nonstop3h 05m

$201

ChicagoPhoenix

ORD - PHX

ORDPHX

Chicago O'Hare Intl

Sat 12/13

3:05 pm-6:00 pm

Nonstop3h 55m

Phoenix Sky Harbor Intl

Thu 12/25

9:05 am-1:30 pm

Nonstop3h 25m

$203

ChicagoPhoenix

ORD - PHX

ORDPHX

Chicago O'Hare Intl

Thu 12/11

12:50 pm-3:48 pm

Nonstop3h 58m

Phoenix Sky Harbor Intl

Sun 1/11

3:50 pm-8:22 pm

Nonstop3h 32m

$209

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Phoenix

Have a flexible travel schedule? Discover the best time to fly to Phoenix from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Phoenix

What is the cheapest month to book a flight from Illinois to Phoenix?

Currently, April is the cheapest month in which you can book a flight from Illinois to Phoenix (average of $59). Flying from Illinois to Phoenix in March is currently the most expensive (average of $139). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to PHX?

Find hourly flight availability from Illinois to Phoenix. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

When flying from Illinois to Phoenix, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 34% versus a flight in the morning.

What is the cheapest day to fly from Illinois to Phoenix?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Phoenix. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Illinois to Phoenix flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Phoenix. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Illinois to Phoenix?

    Airlines like Allegiant Air, Southwest, and United Airlines fly from Illinois to Phoenix in about 3h 44m. The time it takes to get you to your destination is usually consistent. Airlines will cover a distance of 1371 mi. Most flights are nonstop.

  • What are the cheapest airlines to fly from Illinois to Phoenix one-way?

    $48 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Southwest and Allegiant Air, with prices starting from $70 and $87, respectively.

  • What are the most popular routes from Illinois to Phoenix?

    When deciding which route to take from Illinois to Phoenix consider Chicago O'Hare Intl - Phoenix Sky Harbor Intl, Chicago Midway - Phoenix Sky Harbor Intl or Lambert-St Louis - Phoenix Sky Harbor Intl as they are the most popular.

  • What are the most reliable airlines from Illinois to Phoenix?

    The top 3 most reliable airlines when flying from Illinois to Phoenix are Finnair (85%), United Airlines (84%) and SWISS (82%).

  • What are the cheapest flights from Illinois to Phoenix?

    Looking for the cheapest flight from Illinois to Phoenix? While on average our users pay $811, our data indicates the cheapest price to be $93. The most popular route (Chicago O'Hare Intl - Phoenix Sky Harbor Intl), is priced around $83.

  • Can I find deals for flights from Illinois to Phoenix that include hotel bookings?

    Yes. In addition to deals on Illinois to Phoenix flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Phoenix?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Phoenix.

  • Can I find deals for business class flights from Illinois to Phoenix?

    Yes. Cheapflights offers flight deals from Illinois to Phoenix by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Phoenix?

    Currently, April is the cheapest month in which you can book a flight from Illinois to Phoenix (average of $59). Flying from Illinois to Phoenix in March is currently the most expensive (average of $139). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 8 airlines flying from Illinois to Phoenix

Discover the top 8 airlines that operate flights from Illinois to Phoenix. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$69Average$211FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$98Average$220FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$116Average$266FlexibilityNo cancel feeOn-time88%
Alaska AirlinesCheapest$154Average$231FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$183Average$390FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$193Average$452FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$206Average$366FlexibilityNo cancel feeOn-time63%
DeltaCheapest$236Average$341FlexibilityNo cancel feeOn-timeN/A

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