$39+ 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 1/16. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ORD
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 Arizona to Illinois
Cheapest flights from Arizona to IllinoisExplore 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 December 18, 2025.
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 December 18, 2025.
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/253:40 pmPHX - ORD
Nonstop3h 43mFrontier
Thu 1/19:33 pmORD - PHX
Nonstop3h 54mFrontier
Deal found 12/17![Frontier logo]()
$149
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/304:05 pmLAS - STL
Nonstop3h 20mFrontier
Mon 1/510:10 pmSTL - LAS
Nonstop3h 52mFrontier
Deal found 12/17![Frontier logo]()
$149
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3012:59 amLAS - ORD
1 stop21h 13mMultiple Airlines
Wed 1/77:57 pmORD - LAS
Nonstop4h 14mMultiple Airlines
Deal found 12/17![Multiple Airlines logo]()
$154
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/249:58 amPHX - ORD
1 stop27h 19mFrontier
Mon 1/51:32 pmORD - PHX
Nonstop4h 08mFrontier
Deal found 12/15![Frontier logo]()
$156
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/304:05 pmLAS - STL
Nonstop3h 20mFrontier
Wed 1/213:46 pmSTL - LAS
1 stop9h 11mFrontier
Deal found 12/17![Frontier logo]()
$164
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/242:26 pmLAS - ORD
Nonstop3h 44mUnited Airlines
Thu 1/18:18 pmORD - LAS
Nonstop4h 14mUnited Airlines
Deal found 12/17![United Airlines logo]()
$166
This Frontier deal was found by Cheapflights users on 12/18. 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.
Mon 12/299:58 amPHX - STL
1 stop10h 27mFrontier
Mon 1/58:52 pmSTL - PHX
Nonstop3h 31mFrontier
Deal found 12/18![Frontier logo]()
$171
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3012:59 amLAS - ORD
1 stop21h 13mMultiple Airlines
Sat 1/103:22 pmORD - LAS
1 stop9h 39mMultiple Airlines
Deal found 12/17![Multiple Airlines logo]()
$175
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:00 amPHX - ORD
1 stop16h 12mFrontier
Sun 1/410:49 pmORD - PHX
1 stop10h 59mFrontier
Deal found 12/17![Frontier logo]()
$176
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3111:59 pmLAS - ORD
Nonstop3h 53mAmerican Airlines
Sat 1/107:38 pmORD - LAS
Nonstop4h 08mAmerican Airlines
Deal found 12/17![American Airlines logo]()
$179
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 12/243:43 pmPHX - ORD
1 stop7h 29mFrontier
Thu 1/19:33 pmORD - PHX
Nonstop3h 54mFrontier
Deal found 12/15![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 12/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/253:40 pmPHX - ORD
Nonstop3h 43mFrontier
Sat 1/39:55 pmORD - PHX
Nonstop3h 54mFrontier
Deal found 12/14![Frontier logo]()
$182
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 December 18, 2025.
Round-trip from | $79 (Kiwi.com) |
|---|---|
One-way from | $39 (Kiwi.com) |
Popular in | December |
Cheapest in | January |
Average price | $315 |
Good round-trip deal | $226 or less |
Good one-way deal | $107 or less |
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 December 18, 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
Fri 2/6
3:32 pm-8:48 pm
Nonstop3h 16m
Lambert-St Louis
Sun 2/8
9:32 pm-11:31 pm
Nonstop3h 59m
$79
Las VegasSt. Louis
LAS - STL
LASSTL
Las Vegas Harry Reid Intl
Fri 2/6
3:32 pm-8:48 pm
Nonstop3h 16m
Lambert-St Louis
Mon 2/9
9:45 pm-11:44 pm
Nonstop3h 59m
$80
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Wed 1/14
9:10 am-1:15 pm
Nonstop3h 05m
Chicago Greater Rockford
Wed 1/21
2:05 pm-4:49 pm
Nonstop3h 44m
$106
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Fri 1/23
1:21 pm-5:26 pm
Nonstop3h 05m
Chicago Greater Rockford
Mon 1/26
6:16 pm-9:00 pm
Nonstop3h 44m
$106
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Fri 2/13
3:01 pm-7:01 pm
Nonstop3h 00m
Chicago Greater Rockford
Mon 2/16
7:51 pm-10:39 pm
Nonstop3h 48m
$114
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Fri 1/9
1:21 pm-5:26 pm
Nonstop3h 05m
Chicago Greater Rockford
Mon 1/12
6:16 pm-9:00 pm
Nonstop3h 44m
$114
Las VegasSt. Louis
LAS - STL
LASSTL
Las Vegas Harry Reid Intl
Thu 1/15
7:25 am-12:40 pm
Nonstop3h 15m
Lambert-St Louis
Thu 2/5
10:01 pm-11:49 pm
Nonstop3h 48m
$124
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
Fri 1/16
7:34 pm-2:48 pm
1 stop18h 14m
Lambert-St Louis
Mon 1/19
9:03 pm-11:44 pm
Nonstop3h 41m
$127
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
Sat 1/24
8:30 am-2:46 pm
1 stop5h 16m
Lambert-St Louis
Sat 1/31
3:46 pm-11:53 pm
1 stop9h 07m
$128
Las VegasSt. Louis
LAS - STL
LASSTL
Las Vegas Harry Reid Intl
Thu 2/26
3:30 pm-1:09 pm
1 stop19h 39m
Lambert-St Louis
Sat 2/28
6:41 pm-8:31 pm
Nonstop3h 50m
$140
Showing 1-10 of 60 results
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 $62). 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 December 18, 2025.
It’s typically best to fly out from Arizona to Illinois in the evening. Doing so could potentially save you 10% 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 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. Sunday 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 December 18, 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.
Crew
8.6
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Overall
7.9
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Overall
7.9
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Overall
7.9
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Overall
7.9
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Overall
7.9
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Overall
7.9
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from Arizona to Illinois. 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 Arizona to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
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 December 18, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$79 | Average$208 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$81 | Average$225 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$106 | Average$211 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$149 | Average$366 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$162 | Average$355 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$182 | Average$379 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$198 | Average$460 | FlexibilityNo cancel fee | On-time71% |