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Sky Harbor Intl

$49+ 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 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PHX
Dec 2 — Dec 91
Tue 12/2
Tue 12/9
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 November 2, 2025.

Round-trip from

$147
(Kiwi.com)

One-way from

$49
(Frontier)

Popular in

March

Cheapest in

August

Average price

$303

Good round-trip deal

$183 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 ($15 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 November 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 November 2, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/1. 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 12/127:43 pmSTL - PHX
1 stop6h 01mFrontier
Wed 12/177:43 pmPHX - STL
1 stop19h 41mFrontier
Deal found 11/1$147
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 12/1212:07 pmSTL - PHX
Nonstop3h 31mFrontier
Sat 12/137:43 pmPHX - STL
1 stop15h 29mFrontier
Deal found 11/1$148
This Frontier deal was found by Cheapflights users on 11/1. 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 11/283:53 pmSTL - PHX
Nonstop3h 33mFrontier
Fri 12/510:26 pmPHX - STL
1 stop10h 48mFrontier
Deal found 11/1$149
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 12/127:43 pmSTL - PHX
1 stop6h 01mFrontier
Sun 12/149:59 pmPHX - STL
1 stop13h 13mFrontier
Deal found 11/1$151
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 12/107:43 pmSTL - PHX
1 stop13h 23mFrontier
Tue 12/164:32 pmPHX - STL
1 stop16h 42mFrontier
Deal found 11/1$152
This Kiwi.com deal was found by Cheapflights users on 11/1. 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.
Sun 12/1410:44 pmSTL - PHX
1 stop11h 04mFrontier
Wed 12/177:43 pmPHX - STL
1 stop19h 41mFrontier
Deal found 11/1$153
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 12/137:43 pmSTL - PHX
1 stop6h 01mFrontier
Sun 12/149:59 pmPHX - STL
1 stop13h 13mFrontier
Deal found 11/1$155
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 12/107:43 pmSTL - PHX
1 stop13h 23mFrontier
Mon 12/157:25 amPHX - STL
Nonstop2h 57mFrontier
Deal found 11/1$156
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 12/107:43 pmSTL - PHX
1 stop13h 23mFrontier
Fri 12/1210:26 pmPHX - STL
1 stop10h 48mFrontier
Deal found 11/1$157
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 12/67:43 pmSTL - PHX
1 stop6h 01mFrontier
Mon 12/86:00 amPHX - STL
2 stops15h 33mFrontier
Deal found 11/1$158
This Priceline deal was found by Cheapflights users on 11/1. 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.
Fri 11/1412:09 pmSTL - PHX
Nonstop3h 22mFrontier
Mon 11/177:25 amPHX - STL
Nonstop2h 59mFrontier
Deal found 11/1$160
This CheapOair deal was found by Cheapflights users on 11/1. 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.
Mon 11/246:20 amMDW - PHX
Nonstop4h 05mFrontier
Thu 12/45:50 pmPHX - MDW
1 stop26h 38mFrontier
Deal found 11/1$163

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 November 2, 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

ChicagoPhoenix

MDW - PHX

MDWPHX

Chicago Midway

Wed 1/7

1:55 pm-4:50 pm

Nonstop3h 55m

Phoenix Sky Harbor Intl

Sun 1/11

6:05 pm-10:20 pm

Nonstop3h 15m

$199

ChicagoPhoenix

MDW - PHX

MDWPHX

Chicago Midway

Sun 2/22

5:00 am-8:10 am

Nonstop4h 10m

Phoenix Sky Harbor Intl

Sun 2/22

8:35 pm-12:45 am

Nonstop3h 10m

$201

ChicagoPhoenix

MDW - PHX

MDWPHX

Chicago Midway

Tue 3/3

5:25 pm-12:16 am

1 stop7h 51m

Phoenix Sky Harbor Intl

Wed 3/4

11:55 pm-8:50 am

1 stop7h 55m

$217

ChicagoPhoenix

ORD - PHX

ORDPHX

Chicago O'Hare Intl

Sat 12/13

3:05 pm-11:59 pm

1 stop9h 54m

Phoenix Sky Harbor Intl

Tue 12/16

7:56 pm-2:09 pm

1 stop17h 13m

$217

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Tue 12/9

1:35 pm-5:51 pm

1 stop5h 16m

Phoenix Sky Harbor Intl

Tue 12/16

1:45 pm-9:40 pm

1 stop6h 55m

$217

ChicagoPhoenix

MDW - PHX

MDWPHX

Chicago Midway

Sun 1/18

1:49 pm-9:02 pm

1 stop8h 13m

Phoenix Sky Harbor Intl

Wed 1/21

11:53 pm-9:58 am

1 stop9h 05m

$217

ChicagoPhoenix

MDW - PHX

MDWPHX

Chicago Midway

Sat 1/17

1:28 pm-7:05 pm

1 stop6h 37m

Phoenix Sky Harbor Intl

Sun 1/18

1:55 pm-10:09 pm

1 stop7h 14m

$217

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Wed 12/10

2:20 pm-6:57 pm

1 stop5h 37m

Phoenix Sky Harbor Intl

Mon 12/15

12:59 am-9:10 am

1 stop7h 11m

$217

ChicagoPhoenix

MDW - PHX

MDWPHX

Chicago Midway

Sat 12/6

9:59 am-5:49 pm

1 stop8h 50m

Phoenix Sky Harbor Intl

Sat 1/10

7:10 am-4:16 pm

1 stop8h 06m

$219

ChicagoPhoenix

MDW - PHX

MDWPHX

Chicago Midway

Tue 2/24

1:05 pm-9:51 pm

1 stop9h 46m

Phoenix Sky Harbor Intl

Thu 2/26

11:55 pm-8:50 am

1 stop7h 55m

$219

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

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, September is the cheapest month in which you can book a flight from Illinois to Phoenix Sky Harbor Intl Airport (average of $79). Flying from Illinois to Phoenix Sky Harbor Intl Airport in June is currently the most expensive (average of $176). 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 November 2, 2025.

When flying from Illinois to Phoenix Sky Harbor Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 39% versus a flight in the morning.

What is the cheapest day to fly from Illinois to Phoenix Sky Harbor Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Sky Harbor Intl. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Illinois to Phoenix Sky Harbor Intl Airport flight should consider departing on Friday mornings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 2, 2025.

The most flights from USIL to PHX are scheduled on a Sunday (39 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (25 on average).

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 3h 55m. Fly via Southwest, Delta, or Alaska Airlines to get the fastest option. Airlines will cover a distance of 1440 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 Frontier, with whom users have recently found tickets for as low as $70. However, be on the lookout for offers from Southwest 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 (85%), Air Canada (80%) or Cathay Pacific (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 $811 for a flight from Illinois to Phoenix Sky Harbor Intl Airport. The cheapest flight overall is $93 while the most popular route, (Chicago O'Hare Intl - Phoenix Sky Harbor Intl) is currently priced at $54.

  • 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, September is the cheapest month in which you can book a flight from Illinois to Phoenix Sky Harbor Intl Airport (average of $79). Flying from Illinois to Phoenix Sky Harbor Intl Airport in June is currently the most expensive (average of $176). 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
Glendale
Payson
Chandler
Casa Grande
Globe
Goodyear
Peoria
Camp Verde
Buckeye
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 November 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$92Average$209FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$98Average$220FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$154Average$231FlexibilityNo cancel feeOn-time75%
Allegiant AirCheapest$166Average$324FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$183Average$371FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$193Average$452FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$206Average$366FlexibilityNo cancel feeOn-time63%
DeltaCheapest$236Average$341FlexibilityNo cancel feeOn-timeN/A

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