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$27+ 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 12/29. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ORD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
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 October 30, 2025.

Round-trip from

$83
(Kiwi.com)

One-way from

$27
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$249

Good round-trip deal

$150 or less

Good one-way deal

$138 or less
From Arizona to Illinois
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One-way flight from Arizona to Illinois
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High demand for flights, 0% potential price rise
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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 October 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 October 30, 2025.

This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1212:41 amLAS - ORD
1 stop10h 42mFrontier
Sun 11/1610:43 pmORD - LAS
Nonstop4h 01mFrontier
Deal found 10/28$106
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.
Fri 11/143:50 pmLAS - ORD
Nonstop3h 58mMultiple Airlines
Mon 11/244:58 pmORD - LAS
Nonstop4h 06mMultiple Airlines
Deal found 10/29$107
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.
Wed 11/1212:41 amLAS - ORD
1 stop10h 42mFrontier
Mon 11/1710:43 pmORD - LAS
Nonstop4h 01mFrontier
Deal found 10/29$108
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.
Fri 11/143:50 pmLAS - ORD
Nonstop3h 58mMultiple Airlines
Sat 11/154:38 pmORD - LAS
Nonstop4h 06mMultiple Airlines
Deal found 10/29$109
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2711:45 amLAS - ORD
Nonstop3h 45mFrontier
Thu 12/411:44 amORD - LAS
1 stop12h 08mFrontier
Deal found 10/28$112
This CheapOair deal was found by Cheapflights users on 10/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/149:12 amLAS - ORD
1 stop13h 03mFrontier
Sun 11/1610:43 pmORD - LAS
Nonstop4h 01mFrontier
Deal found 10/30$113
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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.
Thu 11/2012:31 pmLAS - ORD
1 stop9h 37mFrontier
Sun 11/237:57 pmORD - LAS
Nonstop4h 21mFrontier
Deal found 10/30$114
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1311:59 pmLAS - ORD
Nonstop3h 33mSpirit Airlines
Sun 11/168:00 amORD - LAS
Nonstop4h 05mSpirit Airlines
Deal found 10/28$115
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1311:59 pmLAS - ORD
Nonstop3h 33mSpirit Airlines
Mon 11/177:58 pmORD - LAS
Nonstop4h 09mSpirit Airlines
Deal found 10/29$117
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.
Wed 11/127:54 pmLAS - STL
1 stop11h 13mFrontier
Thu 11/132:42 pmSTL - LAS
Nonstop3h 40mFrontier
Deal found 10/29$117
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 11/2511:59 pmLAS - ORD
Nonstop3h 33mMultiple Airlines
Thu 11/276:45 pmORD - LAS
Nonstop4h 23mMultiple Airlines
Deal found 10/27$118
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.
Sun 12/710:50 amLAS - ORD
1 stop11h 23mFrontier
Sun 12/1412:59 pmORD - LAS
Nonstop4h 16mFrontier
Deal found 10/29$120

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 October 30, 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

Thu 1/22

11:28 am-4:49 pm

Nonstop3h 21m

Lambert-St Louis

Sun 1/25

5:44 pm-7:33 pm

Nonstop3h 49m

$83

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 2/5

7:51 pm-10:02 am

1 stop12h 11m

Lambert-St Louis

Sun 2/8

5:44 pm-7:33 pm

Nonstop3h 49m

$117

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 11/13

8:48 pm-9:07 am

1 stop10h 19m

Lambert-St Louis

Thu 11/20

9:54 pm-11:39 pm

Nonstop3h 45m

$127

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Thu 12/4

11:59 pm-5:33 am

Nonstop3h 34m

Chicago O'Hare Intl

Sun 12/7

8:02 pm-10:14 pm

Nonstop4h 12m

$131

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Mon 1/26

11:28 am-4:49 pm

Nonstop3h 21m

Lambert-St Louis

Wed 1/28

7:43 pm-9:40 am

2 stops15h 57m

$147

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Tue 11/11

7:47 pm-9:07 am

1 stop11h 20m

Lambert-St Louis

Thu 11/13

11:07 am-9:28 pm

1 stop12h 21m

$150

Las VegasChicago

LAS - MDW

LASMDW

Las Vegas Harry Reid Intl

Thu 1/22

11:40 pm-5:05 am

Nonstop3h 25m

Chicago Midway

Mon 1/26

6:10 am-8:25 am

Nonstop4h 15m

$154

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Wed 2/4

12:15 am-11:01 am

1 stop8h 46m

Lambert-St Louis

Sun 2/8

5:44 pm-7:33 pm

Nonstop3h 49m

$159

Las VegasChicago

LAS - MDW

LASMDW

Las Vegas Harry Reid Intl

Thu 11/20

4:40 pm-10:10 pm

Nonstop3h 30m

Chicago Midway

Sun 11/23

9:25 am-11:25 am

Nonstop4h 00m

$179

Las VegasChicago

LAS - MDW

LASMDW

Las Vegas Harry Reid Intl

Thu 12/11

11:40 pm-5:05 am

Nonstop3h 25m

Chicago Midway

Sun 12/14

5:15 pm-7:10 pm

Nonstop3h 55m

$184

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

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, December is the cheapest month in which you can book a flight from Arizona to Illinois (average of $64). Flying from Arizona to Illinois in June is currently the most expensive (average of $178). 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 October 30, 2025.

It’s typically best to fly out from Arizona to Illinois in the evening. Doing so could potentially save you 9% on the flight price compared to flying in the morning, which is usually more expensive.

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

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

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

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 October 30, 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
4,243 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

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
4,243 reviews
Southwest
8.0
Very good
4,243 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

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
8,996 reviews
Southwest
8.0
Very good
4,243 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

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
11,034 reviews
Southwest
8.0
Very good
4,243 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

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
694 reviews
Southwest
8.0
Very good
4,243 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

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
3,123 reviews
Southwest
8.0
Very good
4,243 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

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 $83, Frontier can have you in Illinois from Arizona in 3h 21m. The distance from Arizona to Illinois is about 1367 mi. All flights are typically nonstop.

  • 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 United Airlines ($66), Southwest ($66), and Frontier ($68).

  • 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, December is the cheapest month in which you can book a flight from Arizona to Illinois (average of $64). Flying from Arizona to Illinois in June is currently the most expensive (average of $178). 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 Arizona to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Arizona to Illinois

Discover the top 7 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$79Average$218FlexibilityNo cancel feeOn-time65%
FrontierCheapest$100Average$215FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$128Average$210FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$149Average$370FlexibilityNo cancel feeOn-time69%
DeltaCheapest$162Average$355FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$197Average$470FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$206Average$388FlexibilityNo cancel feeOn-time63%

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