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Sky Harbor Intl

$66+ Cheap flights from Illinois to Sky Harbor Intl (PHX)

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 10/10. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PHX
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Illinois to Sky Harbor Intl

Keep the following information in mind while searching for Illinois to Sky Harbor Intl flight deals. Data was last updated September 16, 2025.

Round-trip from

$142
(Cheapflightsfares)

One-way from

$66
(Cheapflightsfares)

Popular in

March

Cheapest in

September

Average price

$217

Good round-trip deal

$177 or less

Good one-way deal

$114 or less
From Illinois to Phoenix Sky Harbor Intl
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One-way flight from Illinois to Phoenix Sky Harbor Intl
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Highest demand for flights based on searches. 5% potential increase in price ($17 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($7 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 Illinois to Phoenix Sky Harbor Intl.
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Price to beat on a one-way flight from Illinois to Phoenix Sky Harbor Intl.
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Find flight deals from Illinois to Sky Harbor Intl

Cheapest flights from Illinois to Sky Harbor Intl
Explore the most affordable flight options available from Illinois to Sky Harbor Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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.
Mon 10/2010:56 pmMDW - PHX
Nonstop3h 51mFrontier
Wed 10/2210:59 pmPHX - MDW
1 stop8h 48mFrontier
Deal found 9/15$142
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 10/88:00 amORD - PHX
1 stop31h 17mFrontier
Mon 10/137:25 amPHX - ORD
Nonstop3h 33mFrontier
Deal found 9/15$142
This Frontier deal was found by Cheapflights users on 9/14. 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 10/308:30 amMDW - PHX
Nonstop3h 53mFrontier
Sun 11/210:53 pmPHX - MDW
1 stop11h 37mFrontier
Deal found 9/14$143
This CheapOair deal was found by Cheapflights users on 9/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2610:51 amORD - PHX
1 stop11h 28mFrontier
Thu 10/307:45 pmPHX - ORD
Nonstop3h 30mFrontier
Deal found 9/15$143
This Cheapflightsfares deal was found by Cheapflights users on 9/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/314:30 pmORD - PHX
Nonstop4h 04mFrontier
Sun 11/28:10 pmPHX - ORD
Nonstop3h 35mFrontier
Deal found 9/16$146
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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.
Mon 10/206:24 pmMDW - PHX
1 stop5h 52mFrontier
Fri 10/2411:24 pmPHX - MDW
1 stop8h 57mFrontier
Deal found 9/15$147
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/264:03 pmORD - PHX
1 stop26h 01mFrontier
Mon 9/298:20 pmPHX - ORD
1 stop23h 08mFrontier
Deal found 9/14$147
This Priceline deal was found by Cheapflights users on 9/13. 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.
Thu 10/26:30 amMDW - PHX
1 stop8h 21mFrontier
Mon 10/66:00 amPHX - MDW
1 stop8h 25mFrontier
Deal found 9/13$148
This Frontier deal was found by Cheapflights users on 9/13. 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 9/295:10 amORD - PHX
1 stop11h 47mFrontier
Thu 10/212:31 pmPHX - ORD
1 stop9h 27mFrontier
Deal found 9/13$148
This Gotogate deal was found by Cheapflights users on 9/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3112:30 pmMDW - PHX
1 stop11h 46mFrontier
Thu 11/64:41 pmPHX - MDW
1 stop18h 56mFrontier
Deal found 9/14$149
This Booking.com deal was found by Cheapflights users on 9/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/286:00 amORD - PHX
1 stop5h 34mFrontier
Wed 10/11:02 pmPHX - ORD
1 stop20h 46mFrontier
Deal found 9/15$149
This Booking.com deal was found by Cheapflights users on 9/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/26:30 amMDW - PHX
1 stop8h 21mFrontier
Sat 10/111:10 pmPHX - MDW
1 stop25h 32mFrontier
Deal found 9/14$150

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Sky Harbor Intl 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 16, 2025.
Use the filters below to find and compare flights from Illinois to Phoenix Sky Harbor Intl Airport that are best for you.

Fly from

Illinois

Fly to

Sky Harbor Intl

Route

Depart

Return

Price

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Wed 10/8

7:52 pm-7:59 am

1 stop14h 07m

Phoenix Sky Harbor Intl

Mon 10/13

9:27 am-9:04 pm

1 stop9h 37m

$172

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Thu 11/13

7:45 pm-9:44 pm

1 stop26h 59m

Phoenix Sky Harbor Intl

Sun 11/16

7:25 am-9:07 am

2 stops24h 42m

$196

ChicagoPhoenix

ORD - PHX

ORDPHX

Chicago O'Hare Intl

Tue 2/3

2:00 pm-12:06 am

1 stop11h 06m

Phoenix Sky Harbor Intl

Sat 2/14

7:00 pm-1:04 pm

1 stop17h 04m

$218

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Tue 10/14

5:20 pm-9:15 pm

1 stop5h 55m

Phoenix Sky Harbor Intl

Tue 10/28

7:35 pm-12:30 am

Nonstop2h 55m

$219

ChicagoPhoenix

MDW - PHX

MDWPHX

Chicago Midway

Tue 10/21

5:04 pm-11:00 pm

1 stop7h 56m

Phoenix Sky Harbor Intl

Sat 10/25

12:40 am-8:55 am

1 stop6h 15m

$237

ChicagoPhoenix

MDW - PHX

MDWPHX

Chicago Midway

Sat 11/1

10:40 am-4:03 pm

1 stop7h 23m

Phoenix Sky Harbor Intl

Sat 11/1

12:59 am-8:55 am

1 stop6h 56m

$237

ChicagoPhoenix

MDW - PHX

MDWPHX

Chicago Midway

Tue 11/11

5:34 pm-12:08 am

1 stop7h 34m

Phoenix Sky Harbor Intl

Wed 11/19

6:00 am-12:34 pm

1 stop5h 34m

$237

ChicagoPhoenix

MDW - PHX

MDWPHX

Chicago Midway

Fri 10/24

5:04 pm-11:00 pm

1 stop7h 56m

Phoenix Sky Harbor Intl

Tue 11/4

6:00 am-12:28 pm

1 stop5h 28m

$237

ChicagoPhoenix

MDW - PHX

MDWPHX

Chicago Midway

Fri 10/31

4:23 pm-11:00 pm

1 stop8h 37m

Phoenix Sky Harbor Intl

Sat 11/1

12:59 am-8:55 am

1 stop6h 56m

$237

ChicagoPhoenix

MDW - PHX

MDWPHX

Chicago Midway

Tue 11/11

5:34 pm-12:08 am

1 stop7h 34m

Phoenix Sky Harbor Intl

Thu 11/13

12:59 am-9:01 am

1 stop7h 02m

$237

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Sky Harbor Intl

Have a flexible travel schedule? Discover the best time to fly to Sky Harbor Intl from Illinois 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 Illinois to Phoenix Sky Harbor Intl Airport

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

Currently, January is the cheapest month in which you can book a flight from Illinois to Phoenix Sky Harbor Intl Airport (average of $258). Flying from Illinois to Phoenix Sky Harbor Intl Airport in March is currently the most expensive (average of $337). 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 IL to PHX?

Find hourly flight availability from Illinois to Sky Harbor Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

When flying from Illinois to Phoenix Sky Harbor Intl Airport, 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 Illinois to Phoenix Sky Harbor Intl Airport

Explore weekly flight availability from Illinois to Sky Harbor Intl. 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 16, 2025.

The most flights from USIL to PHX are scheduled on a Monday (53 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (39 on average).

How much does it cost to fly round-trip from Illinois to Phoenix Sky Harbor Intl Airport?

Related info for your journey

Find useful and relevant information for your journey from Illinois to Sky Harbor Intl. 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 Illinois to Phoenix Sky Harbor Intl Airport?

    There are many flights that can get you from Illinois to Phoenix Sky Harbor Intl Airport in 5h 55m. Fly via Frontier, Alaska Airlines, or Southwest to get the fastest option. Airlines will cover a distance of 1258 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Illinois to Phoenix Sky Harbor Intl Airport one-way?

    The cheapest airline one-way is Southwest, with whom users have recently found tickets for as low as $70. However, be on the lookout for offers from Frontier and United Airlines, as they are both options that can get you from Illinois to Phoenix Sky Harbor Intl Airport for a low price.

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

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

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

    No one likes to see their flight delayed. When booking a flight from Illinois to Phoenix Sky Harbor Intl Airport consider choosing United Airlines (84%), Air Canada (82%) or Brussels Airlines (80%) as they are the most reliable in getting you off to your destination on time.

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

    On average you can expect to pay $673 for a flight from Illinois to Phoenix Sky Harbor Intl Airport. The cheapest flight overall is $62 while the most popular route, (Chicago O'Hare Intl - Phoenix Sky Harbor Intl) is currently priced at $103.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to Sky Harbor Intl 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 Illinois to Phoenix Sky Harbor Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from Illinois to Phoenix Sky Harbor Intl Airport (average of $258). Flying from Illinois to Phoenix Sky Harbor Intl Airport in March is currently the most expensive (average of $337). 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.

See more FAQs

Traveling to a place near Phoenix Sky Harbor Intl Airport?

Book flights to Phoenix Sky Harbor Intl Airport if you plan to visit one of these locations
Payson
Chandler
Globe
Goodyear
Glendale
Casa Grande
Buckeye
Camp Verde
Peoria
Surprise
Paradise Valley
Avondale
Guadalupe

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Alternative routes for Illinois to Sky Harbor Intl

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Top 8 airlines flying from Illinois to Sky Harbor Intl

Discover the top 8 airlines that operate flights from Illinois to Sky Harbor Intl. 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 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$89Average$208FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$95Average$219FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$154Average$212FlexibilityNo cancel feeOn-time75%
Allegiant AirCheapest$166Average$305FlexibilityNo cancel feeOn-time88%
American AirlinesCheapest$187Average$466FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$190Average$378FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$206Average$366FlexibilityNo cancel feeOn-time63%
DeltaCheapest$216Average$361FlexibilityNo cancel feeOn-timeN/A

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