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$77+ 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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ORD
Apr 19 — Apr 261
Sun 4/19
Sun 4/26
1 adult, Economy
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Cheap 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 March 20, 2026.

This Cheapflightsfares deal was found by Cheapflights users on 3/17. 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 4/2211:51 pm
LAS
-
ORD
Nonstop3h 34m
Spirit Airlines
Fri 4/2410:07 pm
ORD
-
LAS
Nonstop3h 52m
Spirit Airlines
Deal found 3/17$130
This Frontier deal was found by Cheapflights users on 3/18. 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.
Tue 4/2112:20 am
LAS
-
ORD
Nonstop3h 48m
Frontier
Fri 4/248:58 pm
ORD
-
LAS
Nonstop4h 27m
Frontier
Deal found 3/18$131
This Cheapflightsfares deal was found by Cheapflights users on 3/14. 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.
Thu 4/169:00 am
PHX
-
ORD
1 stop25h 13m
Frontier
Sat 4/188:55 am
ORD
-
PHX
Nonstop4h 15m
Frontier
Deal found 3/14$132
This Kiwi.com deal was found by Cheapflights users on 3/17. 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.
Wed 4/221:29 pm
PHX
-
ORD
1 stop14h 21m
Frontier
Sun 4/267:50 am
ORD
-
PHX
Nonstop4h 22m
Frontier
Deal found 3/17$133
This Gotogate deal was found by Cheapflights users on 3/18. 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.
Sat 4/2512:17 pm
PHX
-
ORD
Nonstop3h 36m
Frontier
Sun 5/37:45 am
ORD
-
PHX
Nonstop4h 22m
Frontier
Deal found 3/18$134
This CheapOair deal was found by Cheapflights users on 3/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1512:20 am
LAS
-
ORD
Nonstop3h 48m
Multiple Airlines
Sat 4/1810:07 pm
ORD
-
LAS
Nonstop3h 52m
Multiple Airlines
Deal found 3/16$135
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 4/185:17 pm
PHX
-
ORD
1 stop10h 33m
Frontier
Fri 4/247:50 am
ORD
-
PHX
Nonstop4h 22m
Frontier
Deal found 3/17$138
This CheapOair deal was found by Cheapflights users on 3/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:37 am
PHX
-
MDW
Nonstop3h 27m
Frontier
Mon 4/206:20 am
MDW
-
PHX
Nonstop3h 57m
Frontier
Deal found 3/16$138
This Gotogate deal was found by Cheapflights users on 3/15. 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.
Fri 4/1712:20 am
LAS
-
ORD
Nonstop3h 48m
Multiple Airlines
Sat 4/253:00 pm
ORD
-
LAS
1 stop6h 29m
Multiple Airlines
Deal found 3/15$139
This eDestinos deal was found by Cheapflights users on 3/17. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:47 pm
PHX
-
ORD
1 stop8h 52m
Frontier
Mon 4/136:40 am
ORD
-
PHX
Nonstop4h 10m
Frontier
Deal found 3/17$139
This Priceline deal was found by Cheapflights users on 3/16. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2112:20 am
LAS
-
ORD
Nonstop3h 48m
Multiple Airlines
Sat 4/253:00 pm
ORD
-
LAS
1 stop6h 29m
Multiple Airlines
Deal found 3/16$140
This Super.com deal was found by Cheapflights users on 3/17. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1512:20 am
LAS
-
ORD
Nonstop3h 48m
Frontier
Sun 4/198:58 pm
ORD
-
LAS
Nonstop4h 27m
Frontier
Deal found 3/17$141

Find flight deals from Arizona to Illinois

Keep the following information in mind while searching for Arizona to Illinois flight deals. Data was last updated March 20, 2026.

Round-trip from

$130
(Cheapflightsfares)

One-way from

$77
(Trip.com)

Popular in

December

Cheapest in

February

Average price

$304

Good round-trip deal

$211 or less

Good one-way deal

$110 or less
From Arizona to Illinois
Search Deals
One-way flight from Arizona to Illinois
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Arizona to Illinois.
Search Deals
Price to beat on a one-way flight from Arizona to Illinois.
Search Deals

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 March 20, 2026.
Use the filters below to find and compare flights from Arizona to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Fri 5/8

2:44 pm-7:45 pm

Nonstop3h 01m

Chicago Greater Rockford

Mon 5/11

8:35 pm-10:09 pm

Nonstop3h 34m

$154

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Wed 5/6

9:00 am-2:01 pm

Nonstop3h 01m

Chicago Greater Rockford

Mon 5/11

8:35 pm-10:09 pm

Nonstop3h 34m

$172

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Mon 6/29

4:06 pm-9:15 pm

Nonstop3h 09m

Chicago Greater Rockford

Sat 7/4

1:03 pm-2:25 pm

Nonstop3h 22m

$189

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Sat 5/23

7:05 am-12:11 pm

Nonstop3h 06m

Chicago Greater Rockford

Wed 5/27

8:55 pm-10:30 pm

Nonstop3h 35m

$210

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Wed 4/15

9:00 am-2:01 pm

Nonstop3h 01m

Chicago Greater Rockford

Mon 4/20

8:35 pm-10:09 pm

Nonstop3h 34m

$211

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Fri 4/17

2:44 pm-7:45 pm

Nonstop3h 01m

Chicago Greater Rockford

Mon 4/20

8:35 pm-10:09 pm

Nonstop3h 34m

$211

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Wed 6/3

2:51 pm-8:00 pm

Nonstop3h 09m

Chicago Greater Rockford

Mon 6/8

9:10 pm-10:34 pm

Nonstop3h 24m

$215
Quickest round-trip

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Wed 7/8

2:51 pm-7:59 pm

Nonstop3h 08m

Chicago Greater Rockford

Wed 7/15

8:49 pm-10:11 pm

Nonstop3h 22m

$219

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Fri 7/31

3:15 pm-8:23 pm

Nonstop3h 08m

Chicago Greater Rockford

Wed 8/5

8:58 pm-10:33 pm

Nonstop3h 35m

$221

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Sat 5/16

5:40 pm-11:25 pm

Nonstop3h 45m

Chicago O'Hare Intl

Tue 5/19

6:15 am-8:15 am

Nonstop4h 00m

$237

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/18

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
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6

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, February is the cheapest month in which you can book a flight from Arizona to Illinois (average of $58). 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 March 20, 2026.

It’s typically best to fly out from Arizona to Illinois at noon. Doing so could potentially save you 21% on the flight price compared to flying in the afternoon, 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 March 14, 2026.

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

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 March 20, 2026.

The most flights from USAZ to USIL are scheduled on a Thursday (58 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (41 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 March 20, 2026.
See what other customers who have flown with Southwest,United Airlines, andAllegiant Air 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
4,321 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,321 reviews
Southwest
8.0
Very good
4,321 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,443 reviews
Southwest
8.0
Very good
4,321 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Allegiant Air
7.3
Good
713 reviews
Southwest
8.0
Very good
4,321 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,477 reviews
Southwest
8.0
Very good
4,321 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.7
Fair
3,024 reviews
Southwest
8.0
Very good
4,321 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 $154, Allegiant Air can have you in Illinois from Arizona in 3h 01m. The distance from Arizona to Illinois is about 1371 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 Frontier ($44), Spirit Airlines ($54), and Allegiant Air ($64).

  • 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, February is the cheapest month in which you can book a flight from Arizona to Illinois (average of $58). 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 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 March 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$65Average$221FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$93Average$218FlexibilityNo cancel feeOn-time88%
DeltaCheapest$118Average$293FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$149Average$378FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$187Average$355FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$197Average$439FlexibilityNo cancel feeOn-time71%

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