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$55+ 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 5/1. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ORD
Feb 27 — Mar 61
Thu 2/27
Thu 3/6
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 February 22, 2025.

Round-trip from

$102
(Mytrip)

One-way from

$55
(Frontier)

Popular in

December

Cheapest in

April

Average price

$219

Good round-trip deal

$209 or less

Good one-way deal

$159 or less
From Arizona to Illinois
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One-way flight from Arizona to Illinois
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($37 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).
Search Deals
Average for round-trip flights in February 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 February 22, 2025.

This Mytrip deal was found by Cheapflights users on 2/21. 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.
Fri 4/41:01 amLAS - ORD
Nonstop3h 41mSpirit Airlines
Sat 4/129:09 amORD - LAS
1 stop14h 00mSpirit Airlines
Deal found 2/21$102
This Mytrip deal was found by Cheapflights users on 2/20. 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.
Mon 4/711:28 pmLAS - ORD
Nonstop3h 40mFrontier
Mon 4/147:30 amORD - LAS
1 stop11h 12mFrontier
Deal found 2/20$105
This Mytrip deal was found by Cheapflights users on 2/20. 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.
Mon 4/711:49 pmLAS - MDW
Nonstop3h 34mFrontier
Mon 4/147:25 amMDW - LAS
1 stop11h 17mFrontier
Deal found 2/20$105
This FlightHub deal was found by Cheapflights users on 2/20. 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.
Sat 3/225:50 pmLAS - ORD
1 stop9h 56mMultiple Airlines
Sat 3/297:59 pmORD - LAS
Nonstop4h 16mMultiple Airlines
Deal found 2/20$118
This Cheapflightsfares deal was found by Cheapflights users on 2/21. 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 3/265:15 amPHX - ORD
1 stop5h 38mMultiple Airlines
Wed 4/24:26 pmORD - PHX
Nonstop4h 08mMultiple Airlines
Deal found 2/21$120
This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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 2/284:52 pmLAS - STL
Nonstop3h 16mFrontier
Sun 3/211:08 pmSTL - LAS
Nonstop3h 49mFrontier
Deal found 2/20$121
This Cheapflightsfares deal was found by Cheapflights users on 2/21. 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 4/211:12 amPHX - ORD
Nonstop3h 32mFrontier
Sun 4/64:26 pmORD - PHX
Nonstop4h 08mFrontier
Deal found 2/21$126
This Kiwi.com deal was found by Cheapflights users on 2/20. 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 3/88:02 pmPHX - ORD
1 stop10h 19mSpirit Airlines
Tue 3/119:16 amORD - PHX
1 stop10h 51mSpirit Airlines
Deal found 2/20$132
This Cheapflightsfares deal was found by Cheapflights users on 2/21. 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 4/410:16 amPHX - MDW
Nonstop3h 25mFrontier
Tue 4/87:25 amMDW - PHX
Nonstop3h 56mFrontier
Deal found 2/21$136
This Mytrip deal was found by Cheapflights users on 2/20. 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.
Tue 3/183:34 pmAZA - RFD
Nonstop3h 01mAllegiant Air
Tue 3/259:25 pmRFD - AZA
Nonstop3h 43mAllegiant Air
Deal found 2/20$145
This Mytrip deal was found by Cheapflights users on 2/21. 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.
Thu 3/137:52 amPHX - STL
1 stop7h 53mFrontier
Mon 3/176:55 pmSTL - PHX
1 stop28h 33mFrontier
Deal found 2/21$158
This Trip.com deal was found by Cheapflights users on 2/21. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/611:15 amPHX - MDW
Nonstop3h 19mMultiple Airlines
Tue 3/117:50 amMDW - PHX
1 stop12h 17mMultiple Airlines
Deal found 2/21$159

Find flights from Arizona to Illinois within your budget

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 February 22, 2025.

Fly from

Arizona

Fly to

Illinois

Route

Depart

Return

Price

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Fri 4/4

1:01 am-6:42 am

Nonstop3h 41m

Chicago O'Hare Intl

Sat 4/12

9:09 am-9:09 pm

1 stop14h 00m

$102

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Mon 4/7

11:28 pm-5:08 am

Nonstop3h 40m

Chicago O'Hare Intl

Mon 4/14

7:30 am-4:42 pm

1 stop11h 12m

$105

Las VegasChicago

LAS - MDW

LASMDW

Las Vegas Harry Reid Intl

Mon 4/7

11:49 pm-5:23 am

Nonstop3h 34m

Chicago Midway

Mon 4/14

7:25 am-4:42 pm

1 stop11h 17m

$105

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Sat 3/22

5:50 pm-5:46 am

1 stop9h 56m

Chicago O'Hare Intl

Sat 3/29

7:59 pm-10:15 pm

Nonstop4h 16m

$118

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Wed 3/26

5:15 am-12:53 pm

1 stop5h 38m

Chicago O'Hare Intl

Wed 4/2

4:26 pm-6:34 pm

Nonstop4h 08m

$120

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Wed 4/2

11:12 am-4:44 pm

Nonstop3h 32m

Chicago O'Hare Intl

Sun 4/6

4:26 pm-6:34 pm

Nonstop4h 08m

$126

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Sat 3/8

8:02 pm-7:21 am

1 stop10h 19m

Chicago O'Hare Intl

Tue 3/11

9:16 am-6:07 pm

1 stop10h 51m

$132

PhoenixChicago

PHX - MDW

PHXMDW

Phoenix Sky Harbor Intl

Fri 4/4

10:16 am-3:41 pm

Nonstop3h 25m

Chicago Midway

Tue 4/8

7:25 am-9:21 am

Nonstop3h 56m

$136

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 4/24

3:43 pm-9:05 pm

Nonstop3h 22m

Lambert-St Louis

Mon 4/28

9:55 pm-11:39 pm

Nonstop3h 44m

$143

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Tue 3/18

3:34 pm-8:35 pm

Nonstop3h 01m

Chicago Greater Rockford

Tue 3/25

9:25 pm-11:08 pm

Nonstop3h 43m

$145

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/21

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.

Travel insights for flights from Arizona to Illinois

Get recent, data-driven insights about flights from Arizona to Illinois including ideal travel times, pricing trends, and more.

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 February 22, 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 February 22, 2025.

The most flights from USAZ to USIL are scheduled on a Thursday (47 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (39 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 February 22, 2025.
To help decide which airline to fly from Arizona to Illinois, see what other customers have to say about Southwest, Alaska Airlines 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.
Southwest
8.1
Very good
4,396 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,396 reviews
Southwest
8.1
Very good
4,396 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Alaska Airlines
8.0
Very good
9,702 reviews
Southwest
8.1
Very good
4,396 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,203 reviews
Southwest
8.1
Very good
4,396 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Hawaiian Airlines
7.9
Good
2,314 reviews
Southwest
8.1
Very good
4,396 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,754 reviews
Southwest
8.1
Very good
4,396 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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 ($55), Spirit Airlines ($64), 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 $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

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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 February 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$60Average$166FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$65Average$194FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$144Average$252FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$149Average$434FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$163Average$508FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$185Average$417FlexibilityNo cancel feeOn-time63%
DeltaCheapest$216Average$429FlexibilityNo cancel feeOn-timeN/A
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