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Illinois

$60+ Cheap flights from Arizona to Illinois

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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ORD
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Arizona to Illinois

Keep the following information in mind while searching for Arizona to Illinois flight deals. Data was last updated September 15, 2025.

Round-trip from

$77
(Kiwi.com)

One-way from

$60
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$238

Good round-trip deal

$151 or less

Good one-way deal

$141 or less
From Arizona to Illinois
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One-way flight from Arizona to Illinois
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Highest demand for flights based on searches. 0% potential increase in price ($2 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Arizona to Illinois.
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Price to beat on a one-way flight from Arizona to Illinois.
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Find flight deals from Arizona to Illinois

Cheapest flights from Arizona to Illinois
Explore the most affordable flight options available from Arizona to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/106:20 amLAS - STL
Nonstop3h 23mFrontier
Mon 10/139:59 pmSTL - LAS
Nonstop3h 38mFrontier
Deal found 9/13$77
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/193:15 pmLAS - STL
Nonstop3h 25mFrontier
Mon 9/229:29 pmSTL - LAS
Nonstop3h 36mFrontier
Deal found 9/13$102
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.
Fri 9/263:15 pmLAS - STL
Nonstop3h 25mFrontier
Sat 9/274:58 pmSTL - LAS
Nonstop3h 37mFrontier
Deal found 9/14$103
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2012:59 amLAS - STL
1 stop6h 08mFrontier
Sat 10/254:51 pmSTL - LAS
Nonstop3h 39mFrontier
Deal found 9/13$109
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/112:59 amLAS - STL
1 stop6h 07mFrontier
Sun 10/52:38 pmSTL - LAS
Nonstop3h 38mFrontier
Deal found 9/14$111
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/32:57 pmLAS - ORD
Nonstop4h 02mFrontier
Sun 10/129:54 pmORD - LAS
Nonstop4h 05mFrontier
Deal found 9/13$112
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/308:32 amLAS - STL
Nonstop3h 25mFrontier
Thu 11/611:07 amSTL - LAS
1 stop12h 21mFrontier
Deal found 9/15$112
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.
Fri 11/143:45 pmLAS - ORD
Nonstop3h 58mFrontier
Sat 11/157:15 amORD - LAS
1 stop10h 31mFrontier
Deal found 9/14$113
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/262:57 pmLAS - ORD
Nonstop4h 02mFrontier
Mon 9/299:54 pmORD - LAS
Nonstop4h 11mFrontier
Deal found 9/14$114
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.
Fri 9/193:10 pmLAS - ORD
1 stop6h 49mFrontier
Mon 9/229:54 pmORD - LAS
Nonstop4h 11mFrontier
Deal found 9/13$115
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/412:50 amLAS - ORD
Nonstop3h 35mMultiple Airlines
Fri 11/710:43 pmORD - LAS
Nonstop4h 01mMultiple Airlines
Deal found 9/13$117
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/912:50 amLAS - ORD
Nonstop3h 35mMultiple Airlines
Sun 12/143:53 pmORD - LAS
Nonstop4h 10mMultiple Airlines
Deal found 9/13$118

Cheapflights Fare Finder

 
Customize your flight search to find flights from Arizona to Illinois 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 15, 2025.
Use the filters below to find and compare flights from Arizona to Illinois that are best for you.

Fly from

Arizona

Fly to

Illinois

Route

Depart

Return

Price

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Tue 10/21

9:14 am-9:07 am

1 stop21h 53m

Lambert-St Louis

Sat 10/25

4:51 pm-6:30 pm

Nonstop3h 39m

$109

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Mon 10/13

7:00 am-7:26 pm

1 stop10h 26m

Lambert-St Louis

Mon 10/20

9:59 pm-11:37 pm

Nonstop3h 38m

$120

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Sat 10/11

10:30 am-3:56 pm

Nonstop3h 26m

Lambert-St Louis

Sat 10/18

4:33 pm-9:27 am

1 stop18h 54m

$120

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Thu 10/30

12:59 am-12:16 am

1 stop21h 17m

Chicago O'Hare Intl

Sun 11/2

10:43 pm-12:44 am

Nonstop4h 01m

$125

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Thu 10/16

6:49 am-12:31 pm

Nonstop3h 42m

Chicago O'Hare Intl

Sun 10/19

6:40 am-8:34 am

Nonstop3h 54m

$127

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Thu 9/25

10:41 am-10:45 pm

1 stop10h 04m

Chicago O'Hare Intl

Mon 9/29

6:15 am-8:15 am

Nonstop4h 00m

$130

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Fri 10/3

2:57 pm-8:59 pm

Nonstop4h 02m

Chicago O'Hare Intl

Wed 10/15

7:15 am-1:13 pm

1 stop7h 58m

$133

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Wed 10/1

9:36 am-6:14 pm

1 stop6h 38m

Chicago O'Hare Intl

Wed 10/8

6:35 am-8:29 am

Nonstop3h 54m

$135

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Tue 9/30

12:55 am-10:40 am

1 stop7h 45m

Chicago O'Hare Intl

Thu 10/2

7:09 pm-7:40 am

1 stop14h 31m

$138

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Wed 10/8

12:55 am-9:22 am

1 stop6h 27m

Lambert-St Louis

Sun 10/12

7:52 pm-11:29 pm

1 stop5h 37m

$143

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

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

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

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

Currently, August is the cheapest month in which you can book a flight from Arizona to Illinois (average of $245). Flying from Arizona to Illinois in March is currently the most expensive (average of $321). 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 AZ to IL?

Find hourly flight availability from Arizona to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

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

Weekly flight availability from Arizona to Illinois

Explore weekly flight availability from Arizona to Illinois. 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 15, 2025.

The most flights from USAZ to USIL are scheduled on a Monday (54 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (45 on average).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated September 15, 2025.
See what other customers who have flown with Southwest, United Airlines, and American Airlines from Arizona to Illinois have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,929 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Allegiant Air
7.2
Good
699 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,172 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Arizona to Illinois. 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 Arizona to Illinois?

    For as low as $152, Frontier can have you in Illinois from Arizona in 3h 05m. The distance from Arizona to Illinois is about 1371 mi. This flight may include one or multiple stops.

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

    The cheapest airlines for a one-way flight from Arizona to Illinois are Southwest ($65), United Airlines ($80), and Allegiant Air ($88).

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Arizona to Illinois (average of $245). Flying from Arizona to Illinois in March is currently the most expensive (average of $321). 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 Arizona to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Arizona to Illinois

Discover the top 6 airlines that operate flights from Arizona to Illinois. 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 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$78Average$208FlexibilityNo cancel feeOn-time65%
FrontierCheapest$99Average$216FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$128Average$220FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$149Average$360FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$189Average$467FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$202Average$386FlexibilityNo cancel feeOn-time63%

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