$64+ Cheap flights from Phoenix 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 3/13. 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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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 Phoenix to Illinois
Cheapest flights from Phoenix to IllinoisExplore the most affordable flight options available from Phoenix 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 Phoenix 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 12/15. 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 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.
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 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
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2010:31 pmPHX - ORD
1 stop24h 41mFrontier
Mon 1/197:31 pmORD - PHX
Nonstop4h 13mFrontier
Deal found 12/15![Frontier logo]()
$186
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:00 amPHX - ORD
1 stop10h 22mFrontier
Sat 1/176:02 pmORD - PHX
Nonstop4h 14mFrontier
Deal found 12/15![Frontier logo]()
$195
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:00 amAZA - RFD
Nonstop3h 09mAllegiant Air
Mon 1/58:32 pmRFD - AZA
Nonstop3h 32mAllegiant Air
Deal found 12/16![Allegiant Air logo]()
$195
This Travelocity 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/259:58 amPHX - STL
1 stop5h 26mFrontier
Fri 1/210:10 pmSTL - PHX
1 stop12h 30mFrontier
Deal found 12/17![Frontier logo]()
$208
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:00 amPHX - MDW
1 stop6h 40mDelta
Thu 1/15:59 pmMDW - PHX
1 stop7h 04mDelta
Deal found 12/17![Delta logo]()
$217
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:00 amAZA - RFD
Nonstop3h 09mAllegiant Air
Sun 1/41:09 pmRFD - AZA
Nonstop3h 32mAllegiant Air
Deal found 12/17![Allegiant Air logo]()
$217
Find flight deals from Phoenix to Illinois
Keep the following information in mind while searching for Phoenix to Illinois flight deals. Data was last updated December 18, 2025.
Round-trip from | $94 (Kiwi.com) |
|---|---|
One-way from | $64 (Super.com) |
Popular in | December |
Cheapest in | January |
Average price | $315 |
Cheapflights Fare Finder
Customize your flight search to find flights from Phoenix 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 Phoenix to Illinois that are best for you.
Fly from
Phoenix
Fly to
Illinois
Route
Depart
Return
Price
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
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
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Mon 1/26
1:21 pm-5:26 pm
Nonstop3h 05m
Chicago Greater Rockford
Fri 1/30
6:16 pm-9:00 pm
Nonstop3h 44m
$150
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Fri 1/16
1:21 pm-5:26 pm
Nonstop3h 05m
Chicago Greater Rockford
Mon 1/19
6:16 pm-9:00 pm
Nonstop3h 44m
$153
PhoenixChicago
AZA - RFD
AZARFD
Phoenix-Mesa Gateway
Fri 1/9
1:21 pm-5:26 pm
Nonstop3h 05m
Chicago Greater Rockford
Wed 1/14
2:05 pm-4:49 pm
Nonstop3h 44m
$153
PhoenixChicago
PHX - MDW
PHXMDW
Phoenix Sky Harbor Intl
Mon 2/2
9:00 am-3:49 pm
1 stop5h 49m
Chicago Midway
Sat 2/28
6:25 am-3:27 pm
1 stop10h 02m
$156
Showing 1-10 of 60 results
Best time to book a flight from Phoenix to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Phoenix 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 Phoenix to Illinois
What is the cheapest month to book a flight from Phoenix to Illinois?
Currently, December is the cheapest month in which you can book a flight from Phoenix to Illinois (average of $62). Flying from Phoenix 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 PHX to IL?
Find hourly flight availability from Phoenix 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.
A simple way to save on the total cost of your ticket is to fly from Phoenix to Illinois in the afternoon. If you’re flexible enough to do this you can expect to save up to 15% on your trip compared to booking a flight in the morning.
What is the cheapest day to fly from Phoenix to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Phoenix to Illinois. Price data was last updated on December 16, 2024.
Travelers seeking maximum savings on their Phoenix 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 Phoenix to Illinois have to say. 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.
Comfort
8.0
Overall
7.9
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Overall
7.9
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Overall
7.9
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Overall
7.9
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Overall
7.9
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Overall
7.9
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from Phoenix to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Phoenix to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top 7 airlines flying from Phoenix to Illinois
Discover the top 7 airlines that operate flights from Phoenix 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$210 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$106 | Average$211 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$149 | Average$334 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$162 | Average$355 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$182 | Average$333 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$198 | Average$443 | FlexibilityNo cancel fee | On-time71% |