$28+ Cheap flights from Sky Harbor Intl (PHX) 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
nov. 26 — dic. 31
1 adult, Economy
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Cheapest flights from Sky Harbor Intl to IllinoisExplore the most affordable flight options available from Sky Harbor Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octubre 27, 2025.
Explore the most affordable flight options available from Sky Harbor Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octubre 27, 2025.
This eDestinos deal was found by Cheapflights users on 10/25. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/317:45 pmPHX - ORD
Nonstop3h 30mFrontier
dom. 11/210:43 pmORD - PHX
1 stop25h 46mFrontier
Deal found 10/25![Frontier logo]()
$135
This Cheapflightsfares deal was found by Cheapflights users on 10/25. 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.
vie. 10/317:45 pmPHX - ORD
Nonstop3h 30mFrontier
lun. 11/310:43 pmORD - PHX
1 stop24h 41mFrontier
Deal found 10/25![Frontier logo]()
$136
This CheapOair deal was found by Cheapflights users on 10/24. 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.
jue. 11/134:41 pmPHX - MDW
1 stop18h 56mFrontier
sáb. 11/152:57 pmMDW - PHX
Nonstop3h 53mFrontier
Deal found 10/24![Frontier logo]()
$136
This Frontier deal was found by Cheapflights users on 10/25. 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.
vie. 10/317:45 pmPHX - ORD
Nonstop3h 30mFrontier
dom. 11/910:43 pmORD - PHX
1 stop10h 37mFrontier
Deal found 10/25![Frontier logo]()
$137
This FlightHub deal was found by Cheapflights users on 10/25. 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.
vie. 10/315:11 pmPHX - MDW
1 stop17h 26mFrontier
dom. 11/29:00 amMDW - PHX
Nonstop3h 54mFrontier
Deal found 10/25![Frontier logo]()
$137
This Cheapflightsfares deal was found by Cheapflights users on 10/25. 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.
jue. 12/253:40 pmPHX - ORD
Nonstop3h 43mFrontier
jue. 1/19:33 pmORD - PHX
Nonstop3h 54mFrontier
Deal found 10/25![Frontier logo]()
$138
This Frontier deal was found by Cheapflights users on 10/26. 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.
mar. 11/253:53 pmPHX - ORD
Nonstop3h 35mFrontier
jue. 12/49:53 pmORD - PHX
Nonstop3h 54mFrontier
Deal found 10/26![Frontier logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
lun. 12/810:29 amPHX - MDW
Nonstop3h 23mFrontier
vie. 12/1212:18 pmMDW - PHX
1 stop20h 48mFrontier
Deal found 10/26![Frontier logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
mar. 11/113:02 pmPHX - ORD
Nonstop3h 40mFrontier
sáb. 11/155:45 pmORD - PHX
1 stop17h 33mFrontier
Deal found 10/25![Frontier logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
sáb. 12/203:43 pmPHX - ORD
1 stop7h 29mFrontier
jue. 1/17:00 amORD - PHX
1 stop18h 29mFrontier
Deal found 10/26![Frontier logo]()
$144
This CheapOair deal was found by Cheapflights users on 10/27. 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.
sáb. 11/89:30 amPHX - MDW
Nonstop3h 27mFrontier
dom. 11/99:00 amMDW - PHX
Nonstop3h 54mFrontier
Deal found 10/27![Frontier logo]()
$144
This Cheapflightsfares deal was found by Cheapflights users on 10/25. 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.
vie. 11/78:08 pmPHX - ORD
Nonstop3h 35mFrontier
lun. 11/101:36 pmORD - PHX
1 stop10h 27mFrontier
Deal found 10/25![Frontier logo]()
$145
Cheap flight deals from Sky Harbor Intl to Illinois
Keep the following information in mind while searching for Sky Harbor Intl to Illinois flight deals. Data was last updated octubre 27, 2025.
Round-trip from | $135 (Kiwi.com) |
|---|---|
One-way from | $28 (Kiwi.com) |
Popular in | December |
Cheapest in | February |
Average price | $249 |
Good round-trip deal | $239 or less |
Good one-way deal | $139 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Sky Harbor Intl 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 octubre 27, 2025.
Use the filters below to find and compare flights from Phoenix Sky Harbor Intl Airport to Illinois that are best for you.
Fly from
Sky Harbor Intl
Fly to
Illinois
Route
Depart
Return
Price
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
mié. 11/12
6:30 pm-10:20 pm
Nonstop2h 50m
Lambert-St Louis
mar. 11/18
5:25 pm-7:50 pm
Nonstop3h 25m
$157
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
jue. 12/4
10:26 pm-10:14 am
1 stop10h 48m
Lambert-St Louis
dom. 12/7
1:16 pm-8:49 pm
1 stop8h 33m
$182
PhoenixChicago
PHX - MDW
PHXMDW
Phoenix Sky Harbor Intl
sáb. 1/24
11:05 am-3:20 pm
Nonstop3h 15m
Chicago Midway
sáb. 1/24
7:50 pm-10:45 pm
Nonstop3h 55m
$199
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
vie. 12/12
5:25 pm-12:05 am
1 stop5h 40m
Lambert-St Louis
mar. 12/16
1:50 pm-4:15 pm
Nonstop3h 25m
$215
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
sáb. 12/6
7:00 am-1:30 pm
1 stop5h 30m
Lambert-St Louis
mar. 12/9
6:00 am-11:54 am
1 stop6h 54m
$217
PhoenixChicago
PHX - MDW
PHXMDW
Phoenix Sky Harbor Intl
jue. 12/4
5:00 am-9:15 am
Nonstop3h 15m
Chicago Midway
dom. 12/7
9:50 pm-12:35 am
Nonstop3h 45m
$217
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
vie. 1/23
12:59 am-8:40 am
1 stop6h 41m
Chicago O'Hare Intl
sáb. 1/24
3:15 pm-11:48 pm
1 stop9h 33m
$219
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
jue. 12/4
10:40 am-5:25 pm
1 stop5h 45m
Lambert-St Louis
sáb. 12/6
5:25 am-7:55 am
Nonstop3h 30m
$219
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
vie. 1/16
1:55 pm-11:57 pm
1 stop9h 02m
Chicago O'Hare Intl
lun. 1/19
6:43 pm-12:44 am
1 stop7h 01m
$221
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
sáb. 1/24
5:15 am-12:15 pm
1 stop6h 00m
Chicago O'Hare Intl
sáb. 1/24
1:45 pm-10:00 pm
1 stop9h 15m
$221
Showing 1-10 of 60 results
Best time to book a flight from Sky Harbor Intl to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Sky Harbor Intl 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 Sky Harbor Intl Airport to Illinois
What is the cheapest month to book a flight from Phoenix Sky Harbor Intl Airport to Illinois?
Currently, December is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Illinois (average of $64). Flying from Phoenix Sky Harbor Intl Airport to Illinois in July is currently the most expensive (average of $192). 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 Sky Harbor Intl 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 octubre 27, 2025.
A simple way to save on the total cost of your ticket is to fly from Phoenix Sky Harbor Intl Airport to Illinois in the morning. If you’re flexible enough to do this you can expect to save up to 11% on your trip compared to booking a flight at noon.
What is the cheapest day to fly from Phoenix Sky Harbor Intl Airport to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Sky Harbor Intl to Illinois. Price data was last updated on December 16, 2024.
Travelers seeking maximum savings on their Phoenix Sky Harbor Intl Airport to Illinois flight should consider departing on Wednesday mornings when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Phoenix Sky Harbor Intl Airport to Illinois
Explore weekly flight availability from Sky Harbor Intl 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 octubre 27, 2025.
The most flights from PHX to USIL are scheduled on a Monday (48 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (31 on average).
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 octubre 27, 2025.
Read reviews from past customers who have flown Southwest, United Airlines, and American Airlines from Phoenix Sky Harbor Intl Airport to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Crew
8.6
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Crew
8.6
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Crew
8.6
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Crew
8.6
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Crew
8.6
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Crew
8.6
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Related info for your journey
Find useful and relevant information for your journey from Sky Harbor Intl 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 Sky Harbor Intl to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top 6 airlines flying from Sky Harbor Intl to Illinois
Discover the top 6 airlines that operate flights from Sky Harbor Intl 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 octubre 27, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$79 | Average$218 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$100 | Average$214 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$149 | Average$336 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$162 | Average$355 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$197 | Average$446 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$206 | Average$346 | FlexibilityNo cancel fee | On-time63% |