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$66+ 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 10/10. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PHX
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
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 September 16, 2025.

Round-trip from

$142
(Cheapflightsfares)

One-way from

$66
(Cheapflightsfares)

Popular in

March

Cheapest in

September

Average price

$217
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 ($17 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 September 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 September 16, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2010:56 pmMDW - PHX
Nonstop3h 51mFrontier
Wed 10/2210:59 pmPHX - MDW
1 stop8h 48mFrontier
Deal found 9/15$142
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/88:00 amORD - PHX
1 stop31h 17mFrontier
Mon 10/137:25 amPHX - ORD
Nonstop3h 33mFrontier
Deal found 9/15$142
This Frontier deal was found by Cheapflights users on 9/14. 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 10/308:30 amMDW - PHX
Nonstop3h 53mFrontier
Sun 11/210:53 pmPHX - MDW
1 stop11h 37mFrontier
Deal found 9/14$143
This CheapOair deal was found by Cheapflights users on 9/15. 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.
Sun 10/2610:51 amORD - PHX
1 stop11h 28mFrontier
Thu 10/307:45 pmPHX - ORD
Nonstop3h 30mFrontier
Deal found 9/15$143
This Cheapflightsfares deal was found by Cheapflights users on 9/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/314:30 pmORD - PHX
Nonstop4h 04mFrontier
Sun 11/28:10 pmPHX - ORD
Nonstop3h 35mFrontier
Deal found 9/16$146
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/206:24 pmMDW - PHX
1 stop5h 52mFrontier
Fri 10/2411:24 pmPHX - MDW
1 stop8h 57mFrontier
Deal found 9/15$147
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/264:03 pmORD - PHX
1 stop26h 01mFrontier
Mon 9/298:20 pmPHX - ORD
1 stop23h 08mFrontier
Deal found 9/14$147
This Priceline deal was found by Cheapflights users on 9/13. 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.
Thu 10/26:30 amMDW - PHX
1 stop8h 21mFrontier
Mon 10/66:00 amPHX - MDW
1 stop8h 25mFrontier
Deal found 9/13$148
This Frontier deal was found by Cheapflights users on 9/13. 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 9/295:10 amORD - PHX
1 stop11h 47mFrontier
Thu 10/212:31 pmPHX - ORD
1 stop9h 27mFrontier
Deal found 9/13$148
This Gotogate deal was found by Cheapflights users on 9/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3112:30 pmMDW - PHX
1 stop11h 46mFrontier
Thu 11/64:41 pmPHX - MDW
1 stop18h 56mFrontier
Deal found 9/14$149
This Booking.com deal was found by Cheapflights users on 9/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/286:00 amORD - PHX
1 stop5h 34mFrontier
Wed 10/11:02 pmPHX - ORD
1 stop20h 46mFrontier
Deal found 9/15$149
This Booking.com deal was found by Cheapflights users on 9/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/26:30 amMDW - PHX
1 stop8h 21mFrontier
Sat 10/111:10 pmPHX - MDW
1 stop25h 32mFrontier
Deal found 9/14$150

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 September 16, 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 12/5

6:56 pm-9:28 pm

Nonstop3h 32m

Phoenix-Mesa Gateway

Fri 12/12

1:57 pm-6:06 pm

Nonstop3h 09m

$159

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Wed 10/8

7:52 pm-7:59 am

1 stop14h 07m

Phoenix Sky Harbor Intl

Mon 10/13

9:27 am-9:04 pm

1 stop9h 37m

$172

ChicagoPhoenix

RFD - AZA

RFDAZA

Chicago Greater Rockford

Fri 10/31

9:25 pm-10:56 pm

Nonstop3h 31m

Phoenix-Mesa Gateway

Fri 11/7

1:45 pm-5:50 pm

Nonstop3h 05m

$177

ChicagoPhoenix

RFD - AZA

RFDAZA

Chicago Greater Rockford

Fri 10/3

8:55 pm-10:26 pm

Nonstop3h 31m

Phoenix-Mesa Gateway

Wed 10/8

2:56 pm-8:06 pm

Nonstop3h 10m

$178

ChicagoPhoenix

RFD - AZA

RFDAZA

Chicago Greater Rockford

Fri 10/3

8:55 pm-10:26 pm

Nonstop3h 31m

Phoenix-Mesa Gateway

Sat 10/4

7:00 am-12:10 pm

Nonstop3h 10m

$181

ChicagoPhoenix

RFD - AZA

RFDAZA

Chicago Greater Rockford

Wed 12/3

1:59 pm-4:31 pm

Nonstop3h 32m

Phoenix-Mesa Gateway

Wed 12/10

9:00 am-1:09 pm

Nonstop3h 09m

$187

ChicagoPhoenix

RFD - AZA

RFDAZA

Chicago Greater Rockford

Fri 10/24

9:25 pm-10:56 pm

Nonstop3h 31m

Phoenix-Mesa Gateway

Fri 10/31

3:25 pm-8:35 pm

Nonstop3h 10m

$192

ChicagoPhoenix

RFD - AZA

RFDAZA

Chicago Greater Rockford

Wed 10/1

8:56 pm-10:27 pm

Nonstop3h 31m

Phoenix-Mesa Gateway

Fri 10/3

2:55 pm-8:05 pm

Nonstop3h 10m

$192

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Thu 11/13

7:45 pm-9:44 pm

1 stop26h 59m

Phoenix Sky Harbor Intl

Sun 11/16

7:25 am-9:07 am

2 stops24h 42m

$196

ChicagoPhoenix

ORD - PHX

ORDPHX

Chicago O'Hare Intl

Tue 2/3

2:00 pm-12:06 am

1 stop11h 06m

Phoenix Sky Harbor Intl

Sat 2/14

7:00 pm-1:04 pm

1 stop17h 04m

$218

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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, January is the cheapest month in which you can book a flight from Illinois to Phoenix (average of $258). Flying from Illinois to Phoenix in March is currently the most expensive (average of $337). 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 September 16, 2025.

When flying from Illinois to Phoenix, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Illinois to Phoenix

Explore weekly flight availability from Illinois to Phoenix. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 16, 2025.

The most flights from USIL to PH1 are scheduled on a Monday (53 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (39 on average).

How much does it cost to fly round-trip from Illinois to Phoenix?

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, Frontier, and Alaska Airlines fly from Illinois to Phoenix in about 3h 32m. The time it takes to get you to your destination can typically vary by up to 10h 35m. Airlines will cover a distance of 1371 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    $70 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on Frontier and Allegiant Air, with prices starting from $70 and $82, 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 United Airlines (84%), Air Canada (82%) and Brussels Airlines (80%).

  • What are the cheapest flights from Illinois to Phoenix?

    Looking for the cheapest flight from Illinois to Phoenix? While on average our users pay $673, our data indicates the cheapest price to be $62. The most popular route (Chicago O'Hare Intl - Phoenix Sky Harbor Intl), is priced around $140.

  • 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, January is the cheapest month in which you can book a flight from Illinois to Phoenix (average of $258). Flying from Illinois to Phoenix in March is currently the most expensive (average of $337). 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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Alternative routes for Illinois to Phoenix

See prices for flight routes from nearby airports that may be better suited for you.
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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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$69Average$220FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$95Average$219FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$114Average$264FlexibilityNo cancel feeOn-time88%
Alaska AirlinesCheapest$154Average$212FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$187Average$466FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$190Average$395FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$206Average$366FlexibilityNo cancel feeOn-time63%
DeltaCheapest$216Average$361FlexibilityNo cancel feeOn-timeN/A

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