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$61+ 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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ORD
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Round-trip from

$99
(Cheapflightsfares)

One-way from

$61
(Cheapflightsfares)

Popular in

December

Cheapest in

September

Average price

$264

Good round-trip deal

$208 or less

Good one-way deal

$127 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. 12% potential increase in price ($33 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 31, 2025.

This FlightHub deal was found by Cheapflights users on 3/31. 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.
Wed 4/3012:55 amLAS - ORD
Nonstop3h 38mSpirit Airlines
Sat 5/109:02 pmORD - LAS
Nonstop4h 05mSpirit Airlines
Deal found 3/31$98
This CheapOair deal was found by Cheapflights users on 3/31. 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 5/23:39 pmLAS - STL
Nonstop3h 26mFrontier
Mon 5/59:55 pmSTL - LAS
Nonstop3h 46mFrontier
Deal found 3/31$119
This Cheapflightsfares deal was found by Cheapflights users on 3/31. 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 5/111:25 pmLAS - ORD
Nonstop3h 45mMultiple Airlines
Sat 5/109:02 pmORD - LAS
Nonstop4h 05mMultiple Airlines
Deal found 3/31$128
This Cheapflightsfares deal was found by Cheapflights users on 3/30. 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.
Sat 4/267:00 amPHX - ORD
Nonstop3h 29mFrontier
Fri 5/28:37 pmORD - PHX
Nonstop4h 15mFrontier
Deal found 3/30$136
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/215:46 pmPHX - ORD
1 stop12h 49mMultiple Airlines
Sat 4/261:34 pmORD - PHX
Nonstop4h 10mMultiple Airlines
Deal found 3/30$141
This CheapOair deal was found by Cheapflights users on 3/31. 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 4/1711:49 pmLAS - MDW
Nonstop3h 34mFrontier
Sun 4/208:50 pmMDW - LAS
Nonstop4h 01mFrontier
Deal found 3/31$141
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/242:34 pmPHX - ORD
1 stop13h 59mSpirit Airlines
Mon 4/287:41 amORD - PHX
1 stop7h 47mSpirit Airlines
Deal found 3/30$147
This Frontier deal was found by Cheapflights users on 3/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2110:16 amPHX - MDW
Nonstop3h 25mFrontier
Tue 4/2912:19 pmMDW - PHX
Nonstop3h 57mFrontier
Deal found 3/30$153
This Mytrip deal was found by Cheapflights users on 3/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/216:40 amAZA - RFD
Nonstop3h 05mAllegiant Air
Wed 5/2812:35 pmRFD - AZA
Nonstop3h 33mAllegiant Air
Deal found 3/30$164
This American Airlines deal was found by Cheapflights users on 3/30. 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.
Wed 5/1411:47 pmLAS - ORD
Nonstop3h 49mAmerican Airlines
Wed 6/47:08 pmORD - LAS
Nonstop4h 09mAmerican Airlines
Deal found 3/30$174
This American Airlines deal was found by Cheapflights users on 3/31. 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.
Mon 4/281:04 amPHX - ORD
Nonstop3h 26mAmerican Airlines
Tue 4/298:35 amORD - PHX
Nonstop3h 56mAmerican Airlines
Deal found 3/31$174
This United Airlines deal was found by Cheapflights users on 3/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1011:05 amPHX - ORD
Nonstop3h 35mUnited Airlines
Sat 5/179:25 amORD - PHX
Nonstop4h 06mUnited Airlines
Deal found 3/30$179

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 31, 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 VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Wed 4/30

12:55 am-6:33 am

Nonstop3h 38m

Chicago O'Hare Intl

Sat 5/10

9:02 pm-11:07 pm

Nonstop4h 05m

$98

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 5/2

3:39 pm-9:05 pm

Nonstop3h 26m

Lambert-St Louis

Mon 5/5

9:55 pm-11:41 pm

Nonstop3h 46m

$119

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Thu 5/1

11:25 pm-5:10 am

Nonstop3h 45m

Chicago O'Hare Intl

Sat 5/10

9:02 pm-11:07 pm

Nonstop4h 05m

$128

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Sat 4/26

7:00 am-12:29 pm

Nonstop3h 29m

Chicago O'Hare Intl

Fri 5/2

8:37 pm-10:52 pm

Nonstop4h 15m

$136

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Mon 4/21

5:46 pm-8:35 am

1 stop12h 49m

Chicago O'Hare Intl

Sat 4/26

1:34 pm-3:44 pm

Nonstop4h 10m

$141

Las VegasChicago

LAS - MDW

LASMDW

Las Vegas Harry Reid Intl

Thu 4/17

11:49 pm-5:23 am

Nonstop3h 34m

Chicago Midway

Sun 4/20

8:50 pm-10:51 pm

Nonstop4h 01m

$141

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Thu 4/24

2:34 pm-6:33 am

1 stop13h 59m

Chicago O'Hare Intl

Mon 4/28

7:41 am-1:28 pm

1 stop7h 47m

$147

PhoenixChicago

PHX - MDW

PHXMDW

Phoenix Sky Harbor Intl

Mon 4/21

10:16 am-3:41 pm

Nonstop3h 25m

Chicago Midway

Tue 4/29

12:19 pm-2:16 pm

Nonstop3h 57m

$153

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Thu 4/17

11:15 pm-4:54 am

Nonstop3h 39m

Chicago O'Hare Intl

Sun 4/20

7:39 pm-10:10 pm

Nonstop4h 31m

$158

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Wed 5/21

6:40 am-11:45 am

Nonstop3h 05m

Chicago Greater Rockford

Wed 5/28

12:35 pm-2:08 pm

Nonstop3h 33m

$164

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

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 $323). 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 31, 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 March 31, 2025.

The most flights from USAZ to USIL are scheduled on a Monday (56 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (12 on average).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 31, 2025.
To help decide which airline to fly from Arizona to Illinois, see what other customers have to say about 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
9,818 reviews

Crew

8.5

Food

7.1

Comfort

7.9

Overall

8.0

Entertainment

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,818 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Crew

8.5

Food

7.1

Comfort

7.9

Overall

8.0

Entertainment

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,275 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Crew

8.5

Food

7.1

Comfort

7.9

Overall

8.0

Entertainment

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,899 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Crew

8.5

Food

7.1

Comfort

7.9

Overall

8.0

Entertainment

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,344 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Crew

8.5

Food

7.1

Comfort

7.9

Overall

8.0

Entertainment

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,614 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Crew

8.5

Food

7.1

Comfort

7.9

Overall

8.0

Entertainment

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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.

  • 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 ($61), Spirit Airlines ($67), and United Airlines ($80).

  • 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 $323). 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 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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$61Average$181FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$73Average$196FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$139Average$240FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$149Average$401FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$167Average$505FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$189Average$421FlexibilityNo cancel feeOn-time63%
DeltaCheapest$216Average$468FlexibilityNo cancel feeOn-timeN/A
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