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$56+ Cheap flights from Illinois to Arizona

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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PHX
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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Cheap flight deals from Illinois to Arizona

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

Round-trip from

$116
(Gotogate)

One-way from

$56
(CheapOair)

Popular in

March

Cheapest in

September

Average price

$257

Good round-trip deal

$149 or less

Good one-way deal

$109 or less
From Illinois to Arizona
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One-way flight from Illinois to Arizona
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Highest demand for flights based on searches. 6% potential increase in price ($19 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Illinois to Arizona.
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Price to beat on a one-way flight from Illinois to Arizona.
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Find flight deals from Illinois to Arizona

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

This Gotogate deal was found by Cheapflights users on 7/30. 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.
Sun 9/2112:36 pmMLI - LAS
Nonstop3h 28mAllegiant Air
Thu 9/256:30 amLAS - MLI
Nonstop3h 16mAllegiant Air
Deal found 7/30$116
This CheapOair deal was found by Cheapflights users on 7/29. 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 8/137:09 pmORD - LAS
1 stop15h 05mSpirit Airlines
Wed 8/2011:10 pmLAS - ORD
Nonstop3h 40mSpirit Airlines
Deal found 7/29$119
This Cheapflightsfares deal was found by Cheapflights users on 7/30. 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 10/39:54 pmORD - LAS
Nonstop4h 11mFrontier
Sun 10/56:00 amLAS - ORD
Nonstop3h 48mFrontier
Deal found 7/30$120
This Booking.com deal was found by Cheapflights users on 7/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/288:37 pmRFD - LAS
Nonstop3h 34mAllegiant Air
Sun 10/57:30 amLAS - RFD
Nonstop3h 24mAllegiant Air
Deal found 7/29$134
This CheapOair deal was found by Cheapflights users on 7/29. 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.
Fri 9/199:54 pmORD - LAS
Nonstop4h 11mMultiple Airlines
Mon 9/226:15 amLAS - ORD
Nonstop3h 36mMultiple Airlines
Deal found 7/29$134
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
Sat 9/2011:23 amMDW - LAS
1 stop9h 06mMultiple Airlines
Fri 9/263:22 pmLAS - MDW
Nonstop3h 30mMultiple Airlines
Deal found 7/29$157
This American Airlines deal was found by Cheapflights users on 7/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/308:44 pmORD - LAS
Nonstop4h 05mAmerican Airlines
Tue 9/211:55 pmLAS - ORD
Nonstop3h 45mAmerican Airlines
Deal found 7/30$159
This Southwest deal was found by Cheapflights users on 7/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/37:50 amMDW - LAS
Nonstop3h 45mSouthwest
Sat 9/610:55 amLAS - MDW
Nonstop3h 45mSouthwest
Deal found 7/28$159
This Priceline deal was found by Cheapflights users on 7/29. 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.
Fri 8/152:15 pmORD - PHX
Nonstop4h 06mFrontier
Mon 8/185:11 pmPHX - ORD
Nonstop3h 44mFrontier
Deal found 7/29$170
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 11/76:40 pmRFD - AZA
Nonstop3h 30mAllegiant Air
Wed 11/123:09 pmAZA - RFD
Nonstop3h 05mAllegiant Air
Deal found 7/29$172
This Frontier deal was found by Cheapflights users on 7/29. 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.
Sun 9/71:53 pmMDW - PHX
Nonstop3h 47mFrontier
Sun 9/144:35 pmPHX - MDW
Nonstop3h 23mFrontier
Deal found 7/29$173
This FlightHub deal was found by Cheapflights users on 7/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/192:07 pmORD - PHX
Nonstop4h 04mMultiple Airlines
Sun 9/2112:14 pmPHX - ORD
1 stop8h 34mMultiple Airlines
Deal found 7/29$173

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Arizona 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 July 30, 2025.
Use the filters below to find and compare flights from Illinois to Arizona that are best for you.

Fly from

Illinois

Fly to

Arizona

Route

Depart

Return

Price

MolineLas Vegas

MLI - LAS

MLILAS

Moline Quad-City

Sun 9/21

12:36 pm-2:04 pm

Nonstop3h 28m

Las Vegas Harry Reid Intl

Thu 9/25

6:30 am-11:46 am

Nonstop3h 16m

$116

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Wed 8/13

7:09 pm-8:14 am

1 stop15h 05m

Las Vegas Harry Reid Intl

Wed 8/20

11:10 pm-4:50 am

Nonstop3h 40m

$119

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Fri 10/3

9:54 pm-12:05 am

Nonstop4h 11m

Las Vegas Harry Reid Intl

Sun 10/5

6:00 am-11:48 am

Nonstop3h 48m

$120

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Fri 9/19

9:54 pm-12:05 am

Nonstop4h 11m

Las Vegas Harry Reid Intl

Mon 9/22

6:15 am-11:51 am

Nonstop3h 36m

$134

ChicagoLas Vegas

RFD - LAS

RFDLAS

Chicago Greater Rockford

Sun 9/28

8:37 pm-10:11 pm

Nonstop3h 34m

Las Vegas Harry Reid Intl

Sun 10/5

7:30 am-12:54 pm

Nonstop3h 24m

$134

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Sat 9/20

11:23 am-6:29 pm

1 stop9h 06m

Las Vegas Harry Reid Intl

Fri 9/26

3:22 pm-8:52 pm

Nonstop3h 30m

$157

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Sat 8/30

8:44 pm-10:49 pm

Nonstop4h 05m

Las Vegas Harry Reid Intl

Tue 9/2

11:55 pm-5:40 am

Nonstop3h 45m

$159

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Wed 9/3

7:50 am-9:35 am

Nonstop3h 45m

Las Vegas Harry Reid Intl

Sat 9/6

10:55 am-4:40 pm

Nonstop3h 45m

$159

ChicagoPhoenix

ORD - PHX

ORDPHX

Chicago O'Hare Intl

Fri 8/15

2:15 pm-4:21 pm

Nonstop4h 06m

Phoenix Sky Harbor Intl

Mon 8/18

5:11 pm-10:55 pm

Nonstop3h 44m

$170

ChicagoPhoenix

MDW - PHX

MDWPHX

Chicago Midway

Sun 9/7

1:53 pm-3:40 pm

Nonstop3h 47m

Phoenix Sky Harbor Intl

Sun 9/14

4:35 pm-9:58 pm

Nonstop3h 23m

$173

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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

Have a flexible travel schedule? Discover the best time to fly to Arizona 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 Arizona

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

Currently, January is the cheapest month in which you can book a flight from Illinois to Arizona (average of $258). Flying from Illinois to Arizona 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 AZ?

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Arizona as you normally would.

Weekly flight availability from Illinois to Arizona

Explore weekly flight availability from Illinois to Arizona. 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 July 30, 2025.

The most flights from USIL to USAZ are scheduled on a Monday (50 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (31 on average).

Reviews of airlines servicing Arizona

Get insights into the airlines that provide service to Arizona. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Arizona. Reviews last updated July 30, 2025.
Read through reviews of airlines operating flights from Illinois to Arizona, such as Alaska Airlines, Southwest, and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,241 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.1

Food

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

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

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

    To fly one-way, consider booking your trip with Spirit Airlines, which is currently one of the cheapest options available, starting at $56. Frontier flights start at $64 while deals on Allegiant Air start at $64 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to Arizona 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 Arizona?

    Currently, January is the cheapest month in which you can book a flight from Illinois to Arizona (average of $258). Flying from Illinois to Arizona 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Illinois to Arizona

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 Arizona

Discover the top 8 airlines that operate flights from Illinois to Arizona. 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$69Average$220FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$98Average$219FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$114Average$263FlexibilityNo cancel feeOn-time88%
Alaska AirlinesCheapest$154Average$212FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$178Average$485FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$179Average$411FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$206Average$396FlexibilityNo cancel feeOn-time63%
DeltaCheapest$216Average$349FlexibilityNo cancel feeOn-timeN/A

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