$49+ Cheap flights from Illinois to Arizona
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 2/23. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PHX
Jan 17 — Jan 241
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Illinois to Arizona
Cheapest flights from Illinois to ArizonaExplore the most affordable flight options available from Illinois to Arizona. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.
Explore the most affordable flight options available from Illinois to Arizona. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:43 pmSTL - PHX
1 stop5h 46mFrontier
Tue 12/307:00 amPHX - STL
1 stop26h 02mFrontier
Deal found 12/15![Frontier logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:00 amORD - PHX
1 stop8h 33mFrontier
Thu 1/810:19 amPHX - ORD
Nonstop3h 38mFrontier
Deal found 12/16![Frontier logo]()
$193
This Super.com deal was found by Cheapflights users on 12/16. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:00 amORD - PHX
1 stop8h 33mFrontier
Thu 1/810:19 amPHX - ORD
Nonstop3h 38mFrontier
Deal found 12/16![Frontier logo]()
$194
This Priceline deal was found by Cheapflights users on 12/16. 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.
Wed 12/242:16 pmMDW - PHX
1 stop11h 19mFrontier
Thu 1/87:25 amPHX - MDW
Nonstop3h 20mFrontier
Deal found 12/16![Frontier logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:00 amORD - LAS
1 stop14h 30mFrontier
Fri 1/93:42 pmLAS - ORD
Nonstop3h 50mFrontier
Deal found 12/15![Frontier logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/206:17 pmORD - LAS
1 stop7h 37mFrontier
Thu 12/258:35 amLAS - ORD
Nonstop3h 42mFrontier
Deal found 12/16![Frontier logo]()
$199
This Frontier deal was found by Cheapflights users on 12/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:00 amORD - PHX
1 stop8h 33mFrontier
Thu 1/13:40 pmPHX - ORD
Nonstop3h 43mFrontier
Deal found 12/16![Frontier logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/259:33 pmORD - PHX
Nonstop3h 54mFrontier
Thu 1/13:40 pmPHX - ORD
Nonstop3h 43mFrontier
Deal found 12/16![Frontier logo]()
$202
This Super.com deal was found by Cheapflights users on 12/16. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/228:52 pmSTL - PHX
Nonstop3h 31mFrontier
Thu 12/259:58 amPHX - STL
1 stop5h 26mFrontier
Deal found 12/16![Frontier logo]()
$204
This Southwest deal was found by Cheapflights users on 12/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:15 pmMDW - LAS
1 stop6h 45mSouthwest
Tue 1/611:40 pmLAS - MDW
Nonstop3h 25mSouthwest
Deal found 12/17![Southwest logo]()
$205
This Super.com deal was found by Cheapflights users on 12/15. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/228:52 pmSTL - PHX
Nonstop3h 31mFrontier
Mon 1/54:10 pmPHX - STL
Nonstop2h 57mFrontier
Deal found 12/15![Frontier logo]()
$206
This Frontier deal was found by Cheapflights users on 12/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:43 pmSTL - PHX
1 stop5h 46mFrontier
Fri 1/210:31 pmPHX - STL
1 stop10h 31mFrontier
Deal found 12/15![Frontier logo]()
$207
Find flight deals from Illinois to Arizona
Keep the following information in mind while searching for Illinois to Arizona flight deals. Data was last updated December 18, 2025.
Round-trip from | $117 (Kiwi.com) |
|---|---|
One-way from | $49 (Frontier) |
Popular in | March |
Cheapest in | August |
Average price | $326 |
Good round-trip deal | $134 or less |
Good one-way deal | $78 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Arizona 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 December 18, 2025.
Use the filters below to find and compare flights from Illinois to Arizona that are best for you.
Fly from
Illinois
Fly to
Arizona
Route
Depart
Return
Price
ChicagoPhoenix
RFD - AZA
RFDAZA
Chicago Greater Rockford
Mon 3/2
7:49 pm-10:32 pm
Nonstop3h 43m
Phoenix-Mesa Gateway
Wed 3/4
11:10 am-3:13 pm
Nonstop3h 03m
$124
ChicagoPhoenix
RFD - AZA
RFDAZA
Chicago Greater Rockford
Wed 1/28
2:05 pm-4:49 pm
Nonstop3h 44m
Phoenix-Mesa Gateway
Wed 2/4
9:10 am-1:15 pm
Nonstop3h 05m
$131
ChicagoPhoenix
RFD - AZA
RFDAZA
Chicago Greater Rockford
Fri 2/13
7:51 pm-10:39 pm
Nonstop3h 48m
Phoenix-Mesa Gateway
Fri 2/20
3:01 pm-7:01 pm
Nonstop3h 00m
$134
ChicagoPhoenix
RFD - AZA
RFDAZA
Chicago Greater Rockford
Mon 2/16
7:51 pm-10:39 pm
Nonstop3h 48m
Phoenix-Mesa Gateway
Fri 2/20
3:01 pm-7:01 pm
Nonstop3h 00m
$135
ChicagoPhoenix
RFD - AZA
RFDAZA
Chicago Greater Rockford
Mon 2/16
7:51 pm-10:39 pm
Nonstop3h 48m
Phoenix-Mesa Gateway
Wed 2/18
9:00 am-1:00 pm
Nonstop3h 00m
$150
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Sat 1/3
12:15 pm-1:56 pm
Nonstop3h 41m
Las Vegas Harry Reid Intl
Thu 1/8
7:10 am-12:34 pm
Nonstop3h 24m
$159
ChicagoPhoenix
RFD - AZA
RFDAZA
Chicago Greater Rockford
Wed 1/7
2:05 pm-4:49 pm
Nonstop3h 44m
Phoenix-Mesa Gateway
Wed 1/14
9:10 am-1:15 pm
Nonstop3h 05m
$159
ChicagoLas Vegas
MDW - LAS
MDWLAS
Chicago Midway
Thu 2/26
3:00 pm-11:49 pm
1 stop10h 49m
Las Vegas Harry Reid Intl
Fri 2/27
12:59 am-3:19 pm
1 stop12h 20m
$165
ChicagoLas Vegas
ORD - LAS
ORDLAS
Chicago O'Hare Intl
Wed 1/14
7:15 am-9:30 am
Nonstop4h 15m
Las Vegas Harry Reid Intl
Wed 1/14
4:55 pm-10:35 pm
Nonstop3h 40m
$169
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Sun 2/1
1:24 pm-3:16 pm
Nonstop3h 52m
Las Vegas Harry Reid Intl
Wed 2/11
11:51 am-8:37 am
2 stops18h 46m
$178
Showing 1-10 of 60 results
Best time to book a flight from Illinois to Arizona
Have a flexible travel schedule? Discover the best time to fly to Arizona from Illinois 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 Illinois to Arizona
What is the cheapest month to book a flight from Illinois to Arizona?
Currently, April is the cheapest month in which you can book a flight from Illinois to Arizona (average of $59). Flying from Illinois to Arizona in March is currently the most expensive (average of $134). 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 IL to AZ?
Find hourly flight availability from Illinois to Arizona. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.
One of the essential ways to save on airfare from Illinois to Arizona is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 26% on airfare.
What is the cheapest day to fly from Illinois to Arizona?
Use this chart to determine the cheapest time to fly round-trip from Illinois to Arizona. Price data was last updated on December 16, 2024.
Travelers seeking maximum savings on their Illinois to Arizona flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Illinois to Arizona
Explore weekly flight availability from Illinois to Arizona. 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 December 18, 2025.
The most flights from USIL to USAZ are scheduled on a Thursday (50 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (23 on average).
Reviews of airlines servicing Arizona
Get insights into the airlines that provide service to Arizona. 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 Arizona. Reviews last updated December 18, 2025.
Read through reviews of airlines operating flights from Illinois to Arizona, such as Southwest, United Airlines, and American Airlines. 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.
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Overall
7.9
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Overall
7.9
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Overall
7.9
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Overall
7.9
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Overall
7.9
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Overall
7.9
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from Illinois to Arizona. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Illinois to Arizona
See prices for flight routes from nearby airports that may be better suited for you.
Top 9 airlines flying from Illinois to Arizona
Discover the top 9 airlines that operate flights from Illinois to Arizona. 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 December 18, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$69 | Average$212 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$98 | Average$221 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$120 | Average$246 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$154 | Average$231 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$183 | Average$402 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$184 | Average$336 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$193 | Average$480 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$206 | Average$397 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$213 | Average$387 | FlexibilityNo cancel fee | On-timeN/A |