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$81+ Cheap flights from Phoenix 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ORD
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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Cheap flight deals from Phoenix to Illinois

Keep the following information in mind while searching for Phoenix to Illinois flight deals. Data was last updated July 30, 2025.

Round-trip from

$170
(FlightHub)

One-way from

$81
(Southwest)

Popular in

December

Cheapest in

September

Average price

$282
From Phoenix to Illinois
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One-way flight from Phoenix to Illinois
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($9 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 July 2025
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Find flight deals from Phoenix to Illinois

Cheapest flights from Phoenix to Illinois
Explore the most affordable flight options available from Phoenix to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.

This FlightHub deal was found by Cheapflights users on 7/29. 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.
Thu 10/3012:14 pmPHX - ORD
1 stop9h 31mMultiple Airlines
Sun 11/22:34 pmORD - PHX
Nonstop4h 00mMultiple Airlines
Deal found 7/29$170
This Cheapflightsfares deal was found by Cheapflights users on 7/30. 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 9/185:06 pmPHX - ORD
Nonstop3h 34mFrontier
Sun 9/212:07 pmORD - PHX
Nonstop4h 04mFrontier
Deal found 7/30$172
This Priceline deal was found by Cheapflights users on 7/29. 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 9/254:35 pmPHX - MDW
Nonstop3h 23mFrontier
Sun 9/281:53 pmMDW - PHX
Nonstop3h 47mFrontier
Deal found 7/29$173
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/137:30 amAZA - RFD
Nonstop3h 05mAllegiant Air
Fri 8/1512:55 pmRFD - AZA
Nonstop3h 33mAllegiant Air
Deal found 7/30$184
This American Airlines deal was found by Cheapflights users on 7/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/236:40 amPHX - ORD
Nonstop3h 42mAmerican Airlines
Sat 8/303:22 pmORD - PHX
Nonstop3h 41mAmerican Airlines
Deal found 7/30$188
This Southwest deal was found by Cheapflights users on 7/28. 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.
Fri 8/295:00 pmPHX - MDW
Nonstop3h 20mSouthwest
Sun 8/316:20 amMDW - PHX
Nonstop3h 40mSouthwest
Deal found 7/28$196
This Southwest deal was found by Cheapflights users on 7/29. 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 8/272:15 pmPHX - ORD
1 stop7h 25mSouthwest
Sat 8/304:20 pmORD - PHX
Nonstop3h 55mSouthwest
Deal found 7/29$198
This Alaska Airlines deal was found by Cheapflights users on 7/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3111:58 amPHX - ORD
1 stop10h 26mAlaska Airlines
Sun 11/29:20 amORD - PHX
1 stop7h 40mAlaska Airlines
Deal found 7/28$215
This United Airlines deal was found by Cheapflights users on 7/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/217:03 pmPHX - ORD
Nonstop3h 27mUnited Airlines
Sun 11/309:05 pmORD - PHX
Nonstop3h 58mUnited Airlines
Deal found 7/28$217
This Sun Country Air deal was found by Cheapflights users on 7/30. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2710:47 amPHX - ORD
1 stop7h 49mSun Country Air
Fri 10/36:15 pmORD - PHX
1 stop24h 02mSun Country Air
Deal found 7/30$219
This CheapOair deal was found by Cheapflights users on 7/28. 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 8/186:00 amPHX - STL
1 stop5h 42mMultiple Airlines
Thu 8/212:30 pmSTL - PHX
1 stop9h 07mMultiple Airlines
Deal found 7/28$230
This Mytrip deal was found by Cheapflights users on 7/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1110:59 pmPHX - RFD
2 stops13h 26mMultiple Airlines
Mon 9/1510:37 amRFD - PHX
2 stops13h 27mMultiple Airlines
Deal found 7/30$234

Cheapflights Fare Finder

 
Customize your flight search to find flights from Phoenix 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 July 30, 2025.
Use the filters below to find and compare flights from Phoenix to Illinois that are best for you.

Fly from

Phoenix

Fly to

Illinois

Route

Depart

Return

Price

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Thu 9/18

5:06 pm-10:40 pm

Nonstop3h 34m

Chicago O'Hare Intl

Sun 9/21

2:07 pm-4:11 pm

Nonstop4h 04m

$172

PhoenixChicago

PHX - MDW

PHXMDW

Phoenix Sky Harbor Intl

Thu 9/25

4:35 pm-9:58 pm

Nonstop3h 23m

Chicago Midway

Sun 9/28

1:53 pm-3:40 pm

Nonstop3h 47m

$173

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Thu 10/16

12:14 pm-11:45 pm

1 stop9h 31m

Chicago O'Hare Intl

Mon 10/20

2:54 pm-4:54 pm

Nonstop4h 00m

$181

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Wed 8/13

7:30 am-12:35 pm

Nonstop3h 05m

Chicago Greater Rockford

Fri 8/15

12:55 pm-2:28 pm

Nonstop3h 33m

$184

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Sat 8/23

6:40 am-12:22 pm

Nonstop3h 42m

Chicago O'Hare Intl

Sat 8/30

3:22 pm-5:03 pm

Nonstop3h 41m

$188

PhoenixChicago

PHX - MDW

PHXMDW

Phoenix Sky Harbor Intl

Fri 8/29

5:00 pm-10:20 pm

Nonstop3h 20m

Chicago Midway

Sun 8/31

6:20 am-8:00 am

Nonstop3h 40m

$196

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Wed 8/27

2:15 pm-11:40 pm

1 stop7h 25m

Chicago O'Hare Intl

Sat 8/30

4:20 pm-6:15 pm

Nonstop3h 55m

$198

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Sat 10/4

11:57 am-11:59 pm

1 stop10h 02m

Chicago O'Hare Intl

Tue 10/7

7:59 pm-9:44 am

1 stop15h 45m

$216

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Sat 9/27

10:47 am-8:36 pm

1 stop7h 49m

Chicago O'Hare Intl

Fri 10/3

6:15 pm-4:17 pm

1 stop24h 02m

$219

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Thu 8/21

4:00 pm-9:30 pm

Nonstop3h 30m

Chicago O'Hare Intl

Sun 8/24

6:00 am-11:06 am

1 stop7h 06m

$223

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 60 results
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Best time to book a flight from Phoenix to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Phoenix 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 to Illinois

What is the cheapest month to book a flight from Phoenix to Illinois?

Currently, August is the cheapest month in which you can book a flight from Phoenix to Illinois (average of $245). Flying from Phoenix 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 Phoenix 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 July 30, 2025.

When flying from Phoenix 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 to Illinois

Explore weekly flight availability from Phoenix 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 July 30, 2025.

The most flights from PH1 to USIL 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 (32 on average).

How much does it cost to fly round-trip from Phoenix to Illinois?

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 July 30, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Phoenix to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,241 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Breeze Airways
8.0
Very good
191 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

Find useful and relevant information for your journey from Phoenix to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Phoenix to Illinois one-way?

    The cheapest airlines for a one-way flight from Phoenix to Illinois are Southwest ($81), Frontier ($93), and Spirit Airlines ($95).

  • What are the most popular routes from Phoenix to Illinois?

    Most travelers choose Phoenix Sky Harbor Intl - Chicago O'Hare Intl, Phoenix Sky Harbor Intl - Chicago Midway or Phoenix Sky Harbor Intl - Lambert-St Louis when deciding on the best route from Phoenix to Illinois.

  • What are the most reliable airlines from Phoenix to Illinois?

    Before booking your flight to Illinois from Phoenix, check out the most reliable airlines to get you to your destination on time: Cathay Pacific (90%), SWISS (88%), Brussels Airlines( 87%).

  • What are the cheapest flights from Phoenix to Illinois?

    While on average a flight from Phoenix to Illinois is generally $1,405, our data shows the cheapest flight currently is $99. When looking at the most popular route, (Phoenix Sky Harbor Intl - Chicago O'Hare Intl), you can expect to pay $156 for that flight.

  • Can I find deals for flights from Phoenix to Illinois that include hotel bookings?

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

  • How can I find direct flights from Phoenix to Illinois?

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

  • Can I find deals for business class flights from Phoenix to Illinois?

    Yes. Cheapflights offers flight deals from Phoenix 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 to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Phoenix to Illinois (average of $245). Flying from Phoenix 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.

See more FAQs

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Alternative routes for Phoenix to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Phoenix to Illinois

Discover the top 7 airlines that operate flights from Phoenix 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$79Average$200FlexibilityNo cancel feeOn-time65%
FrontierCheapest$87Average$210FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$128Average$218FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$149Average$328FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$173Average$478FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$199Average$349FlexibilityNo cancel feeOn-time63%
DeltaCheapest$240Average$293FlexibilityNo cancel feeOn-timeN/A

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