$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 2/23. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ORD
Feb 26 — Mar 51
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 January 27, 2026.
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 January 27, 2026.
This Super.com deal was found by Cheapflights users on 1/27. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1910:19 am
PHX
- ORD
Nonstop3h 35m
Frontier
Mon 2/236:00 am
ORD
- PHX
Nonstop4h 09m
Frontier
Deal found 1/27![Frontier logo]()
$81
This Cheapflightsfares deal was found by Cheapflights users on 1/25. 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.
Sat 4/1812:05 pm
PHX
- ORD
Nonstop3h 36m
Frontier
Sun 4/197:43 am
ORD
- PHX
Nonstop4h 19m
Frontier
Deal found 1/25![Frontier logo]()
$85
This Super.com deal was found by Cheapflights users on 1/26. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/712:19 pm
PHX
- ORD
Nonstop3h 32m
Frontier
Wed 3/48:10 am
ORD
- PHX
Nonstop4h 14m
Frontier
Deal found 1/26![Frontier logo]()
$86
This Trip.com deal was found by Cheapflights users on 1/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/207:23 pm
PHX
- MDW
Nonstop3h 18m
Frontier
Sun 2/223:21 pm
MDW
- PHX
Nonstop4h 07m
Frontier
Deal found 1/26![Frontier logo]()
$86
This Kiwi.com deal was found by Cheapflights users on 1/26. 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.
Fri 2/203:42 pm
PHX
- ORD
Nonstop3h 35m
Frontier
Sun 2/2212:56 pm
ORD
- PHX
Nonstop4h 13m
Frontier
Deal found 1/26![Frontier logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/203:43 pm
PHX
- MDW
Nonstop3h 17m
Frontier
Mon 2/237:25 pm
MDW
- PHX
Nonstop4h 07m
Frontier
Deal found 1/27![Frontier logo]()
$87
This Cheapflightsfares deal was found by Cheapflights users on 1/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/203:42 pm
PHX
- ORD
Nonstop3h 35m
Frontier
Mon 2/236:00 am
ORD
- PHX
Nonstop4h 09m
Frontier
Deal found 1/27![Frontier logo]()
$88
This Expedia deal was found by Cheapflights users on 1/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/258:04 pm
PHX
- ORD
1 stop20h 20m
Frontier
Sat 2/287:55 am
ORD
- PHX
Nonstop4h 14m
Frontier
Deal found 1/26![Frontier logo]()
$92
This Cheapflightsfares deal was found by Cheapflights users on 1/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2710:19 am
PHX
- ORD
Nonstop3h 35m
Frontier
Sun 3/112:56 pm
ORD
- PHX
Nonstop4h 13m
Frontier
Deal found 1/26![Frontier logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/269:30 am
PHX
- ORD
1 stop6h 54m
Frontier
Sat 2/287:55 am
ORD
- PHX
Nonstop4h 14m
Frontier
Deal found 1/27![Frontier logo]()
$97
This Cheapflightsfares deal was found by Cheapflights users on 1/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/261:22 pm
PHX
- ORD
1 stop8h 52m
Frontier
Mon 3/26:00 am
ORD
- PHX
Nonstop4h 09m
Frontier
Deal found 1/26![Frontier logo]()
$101
This Expedia deal was found by Cheapflights users on 1/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1910:19 am
PHX
- ORD
Nonstop3h 35m
Frontier
Sat 2/218:05 am
ORD
- PHX
1 stop16h 39m
Frontier
Deal found 1/26![Frontier logo]()
$102
Find 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 January 27, 2026.
Round-trip from | $81 (Super.com) |
|---|---|
One-way from | $28 (Kiwi.com) |
Popular in | December |
Cheapest in | February |
Average price | $220 |
Good round-trip deal | $219 or less |
Good one-way deal | $128 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 January 27, 2026.
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
Mon 2/23
4:09 pm-8:02 pm
Nonstop2h 53m
Lambert-St Louis
Mon 3/2
8:47 pm-11:28 pm
Nonstop3h 41m
$127
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
Wed 2/18
8:04 pm-9:26 pm
1 stop24h 22m
Lambert-St Louis
Sat 2/21
2:51 pm-11:16 am
1 stop21h 25m
$128
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
Wed 2/18
8:04 pm-9:26 pm
1 stop24h 22m
Lambert-St Louis
Thu 2/26
10:11 pm-8:50 am
1 stop11h 39m
$131
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
Fri 2/6
4:54 pm-11:33 pm
2 stops29h 39m
Lambert-St Louis
Sun 2/8
1:03 pm-3:44 pm
Nonstop3h 41m
$174
PhoenixChicago
PHX - MDW
PHXMDW
Phoenix Sky Harbor Intl
Sat 2/28
5:15 am-9:30 am
Nonstop3h 15m
Chicago Midway
Sat 3/7
8:10 pm-11:00 pm
Nonstop3h 50m
$177
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Sat 2/28
5:45 am-2:05 pm
1 stop7h 20m
Chicago O'Hare Intl
Sat 3/7
3:05 pm-6:05 pm
Nonstop4h 00m
$203
PhoenixChicago
PHX - MDW
PHXMDW
Phoenix Sky Harbor Intl
Sat 2/28
7:05 am-2:30 pm
1 stop6h 25m
Chicago Midway
Tue 3/3
5:05 am-8:15 am
Nonstop4h 10m
$203
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Tue 3/10
5:31 pm-10:59 pm
Nonstop3h 28m
Chicago O'Hare Intl
Sat 3/14
6:20 pm-11:16 pm
1 stop6h 56m
$207
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Thu 2/12
9:30 am-9:03 pm
1 stop10h 33m
Chicago O'Hare Intl
Mon 2/16
5:40 am-11:59 pm
1 stop19h 19m
$208
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
Wed 2/18
9:52 am-3:53 pm
1 stop5h 01m
Lambert-St Louis
Fri 2/20
1:59 pm-12:41 am
1 stop11h 42m
$215
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, February is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Illinois (average of $62). Flying from Phoenix Sky Harbor Intl Airport to Illinois in July is currently the most expensive (average of $193). 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 January 27, 2026.
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 afternoon. If you’re flexible enough to do this you can expect to save up to 34% 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 January 24, 2026.
Travelers seeking maximum savings on their Phoenix Sky Harbor Intl Airport to Illinois flight should consider departing on Thursday evenings 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.
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 January 27, 2026.
The most flights from PHX to USIL are scheduled on a Monday (43 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (28 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 January 27, 2026.
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.
Overall
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Entertainment
7.5
Crew
8.6
Food
7.0
Boarding
8.1
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 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 January 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$66 | Average$204 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$79 | Average$166 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$118 | Average$322 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$149 | Average$335 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$187 | Average$321 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$198 | Average$450 | FlexibilityNo cancel fee | On-time71% |