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$60+ 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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ORD
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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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 September 11, 2025.

Round-trip from

$137
(Jettzy)

One-way from

$60
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$197

Good round-trip deal

$180 or less

Good one-way deal

$141 or less
From Phoenix Sky Harbor Intl to Illinois
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One-way flight from Phoenix Sky Harbor Intl to Illinois
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Highest demand for flights based on searches. 3% potential increase in price ($7 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Phoenix Sky Harbor Intl to Illinois.
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Price to beat on a one-way flight from Phoenix Sky Harbor Intl to Illinois.
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Find flight deals from Sky Harbor Intl to Illinois

Cheapest flights from Sky Harbor Intl to Illinois
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 September 11, 2025.

This Jettzy deal was found by Cheapflights users on 9/11. 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 Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/79:34 amPHX - ORD
1 stop13h 41mFrontier
Mon 11/103:30 pmORD - PHX
Nonstop4h 04mFrontier
Deal found 9/11$137
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 11/2810:00 amPHX - MDW
Nonstop3h 23mFrontier
Sun 12/76:00 amMDW - PHX
Nonstop4h 04mFrontier
Deal found 9/10$137
This Frontier deal was found by Cheapflights users on 9/10. 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.
Fri 10/177:25 amPHX - ORD
Nonstop3h 33mFrontier
Sat 10/187:05 amORD - PHX
1 stop9h 59mFrontier
Deal found 9/10$138
This Frontier deal was found by Cheapflights users on 9/11. 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.
Sun 11/28:10 pmPHX - ORD
Nonstop3h 35mFrontier
Mon 11/36:00 amORD - PHX
1 stop6h 25mFrontier
Deal found 9/11$140
This Booking.com deal was found by Cheapflights users on 9/11. 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.
Thu 10/1610:39 amPHX - MDW
Nonstop3h 26mFrontier
Sun 10/1910:30 amMDW - PHX
1 stop15h 24mFrontier
Deal found 9/11$140
This Booking.com deal was found by Cheapflights users on 9/11. 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.
Thu 11/64:41 pmPHX - MDW
1 stop18h 56mFrontier
Mon 11/108:30 amMDW - PHX
Nonstop3h 53mFrontier
Deal found 9/11$141
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 12/137:00 amPHX - ORD
1 stop10h 34mFrontier
Sun 12/1411:45 amORD - PHX
Nonstop4h 00mFrontier
Deal found 9/10$142
This Southwest deal was found by Cheapflights users on 9/10. 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.
Sat 11/155:40 amPHX - ORD
1 stop6h 20mSouthwest
Tue 11/184:25 pmORD - PHX
Nonstop3h 55mSouthwest
Deal found 9/10$143
This Priceline deal was found by Cheapflights users on 9/8. 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 10/2210:59 pmPHX - MDW
1 stop8h 48mFrontier
Mon 10/2710:56 pmMDW - PHX
Nonstop3h 51mFrontier
Deal found 9/8$143
This Southwest deal was found by Cheapflights users on 9/9. 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 10/86:20 amPHX - ORD
1 stop6h 05mSouthwest
Wed 10/84:20 pmORD - PHX
1 stop7h 10mSouthwest
Deal found 9/9$144
This Frontier deal was found by Cheapflights users on 9/11. 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 11/610:53 pmPHX - MDW
1 stop11h 37mFrontier
Sun 11/99:00 amMDW - PHX
Nonstop3h 54mFrontier
Deal found 9/11$145
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 10/312:37 pmPHX - ORD
1 stop9h 02mFrontier
Tue 10/77:15 amORD - PHX
1 stop9h 49mFrontier
Deal found 9/10$146

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 September 11, 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

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Thu 10/9

9:59 pm-12:59 am

1 stop25h 00m

Chicago O'Hare Intl

Sun 10/12

9:54 pm-11:41 pm

1 stop27h 47m

$147

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Fri 10/17

4:10 pm-1:16 am

1 stop7h 06m

Chicago O'Hare Intl

Wed 10/22

7:15 am-6:21 pm

1 stop13h 06m

$147

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Wed 11/5

1:16 pm-12:12 am

1 stop9h 56m

Chicago O'Hare Intl

Sun 11/9

2:22 pm-12:13 am

1 stop10h 51m

$158

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Wed 11/5

5:10 am-9:36 am

Nonstop3h 26m

Chicago O'Hare Intl

Sun 11/9

5:00 am-7:50 am

Nonstop3h 50m

$165

PhoenixChicago

PHX - MDW

PHXMDW

Phoenix Sky Harbor Intl

Fri 10/24

5:50 pm-11:05 pm

Nonstop3h 15m

Chicago Midway

Tue 10/28

6:25 am-8:10 am

Nonstop3h 45m

$165

PhoenixChicago

PHX - MDW

PHXMDW

Phoenix Sky Harbor Intl

Wed 11/5

6:40 pm-10:55 pm

Nonstop3h 15m

Chicago Midway

Sun 11/9

5:30 am-8:25 am

Nonstop3h 55m

$169

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Fri 10/24

4:55 pm-10:20 pm

Nonstop3h 25m

Chicago O'Hare Intl

Tue 10/28

12:40 pm-4:00 pm

1 stop5h 20m

$171

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Fri 10/17

4:55 pm-10:20 pm

Nonstop3h 25m

Chicago O'Hare Intl

Wed 10/22

4:20 pm-9:30 pm

1 stop7h 10m

$175

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Thu 10/30

6:03 pm-11:30 pm

Nonstop3h 27m

Chicago O'Hare Intl

Mon 11/3

9:15 am-12:22 pm

Nonstop4h 07m

$181

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Fri 11/7

3:25 pm-8:01 pm

Nonstop3h 36m

Chicago O'Hare Intl

Sun 11/9

7:00 am-9:59 am

Nonstop3h 59m

$181

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 60 results
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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, August is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Illinois (average of $245). Flying from Phoenix Sky Harbor Intl Airport to Illinois in March is currently the most expensive (average of $321). 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 September 11, 2025.

When flying from Phoenix Sky Harbor Intl Airport to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 September 11, 2025.

The most flights from PHX to USIL are scheduled on a Monday (54 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (41 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 September 11, 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.
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,937 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Spirit Airlines
6.3
Okay
8,023 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,177 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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.

  • How long is the flight from Phoenix Sky Harbor Intl Airport to Illinois?

    Airlines like Frontier, American Airlines, and Southwest fly from Phoenix Sky Harbor Intl Airport to Illinois in about 3h 15m. The time it takes to get you to your destination can typically vary by up to 21h 45m. Phoenix Sky Harbor Intl Airport and Illinois are separated by a distance of 1440 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Phoenix Sky Harbor Intl Airport to Illinois?

    While some choose either Phoenix Sky Harbor Intl - Chicago Midway or Phoenix Sky Harbor Intl - Lambert-St Louis, Phoenix Sky Harbor Intl - Chicago O'Hare Intl is the most popular route from Phoenix Sky Harbor Intl Airport to Illinois.

  • What are the most reliable airlines from Phoenix Sky Harbor Intl Airport to Illinois?

    The top 3 most reliable airlines when flying from Phoenix Sky Harbor Intl Airport to Illinois are SWISS (89%), Cathay Pacific (89%) and Brussels Airlines (87%).

  • What are the cheapest flights from Phoenix Sky Harbor Intl Airport to Illinois?

    Looking at all options, your cheapest flight can be booked for $88. While the most popular route (Phoenix Sky Harbor Intl - Chicago O'Hare Intl) can be booked for $124 on average, our data indicates $866 when flying from Phoenix Sky Harbor Intl Airport to Illinois.

  • Can I find deals for flights from Sky Harbor Intl to Illinois that include hotel bookings?

    Yes. In addition to deals on Sky Harbor Intl to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sky Harbor Intl to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sky Harbor Intl to Illinois.

  • Can I find deals for business class flights from Sky Harbor Intl to Illinois?

    Yes. Cheapflights offers flight deals from Sky Harbor Intl to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Phoenix Sky Harbor Intl Airport to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Illinois (average of $245). Flying from Phoenix Sky Harbor Intl Airport to Illinois in March is currently the most expensive (average of $321). 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.

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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.
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Top 5 airlines flying from Sky Harbor Intl to Illinois

Discover the top 5 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$78Average$208FlexibilityNo cancel feeOn-time65%
FrontierCheapest$98Average$212FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$149Average$323FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$188Average$445FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$199Average$349FlexibilityNo cancel feeOn-time63%

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