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$60+ 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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ORD
Oct 15 — Oct 224
Wed 10/15
4 travelers, 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 September 15, 2025.

Round-trip from

$137
(Cheapflightsfares)

One-way from

$60
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$238
From Phoenix to Illinois
Search Deals
One-way flight from Phoenix to Illinois
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($2 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 15, 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.
Thu 10/233:30 pmPHX - ORD
Nonstop3h 40mFrontier
Mon 10/271:53 pmORD - PHX
Nonstop3h 56mFrontier
Deal found 9/15$137
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.
Thu 10/1610:39 amPHX - MDW
Nonstop3h 26mFrontier
Mon 10/2010:56 pmMDW - PHX
Nonstop3h 51mFrontier
Deal found 9/14$137
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/25:06 pmPHX - ORD
Nonstop3h 34mFrontier
Wed 10/87:15 amORD - PHX
1 stop9h 49mFrontier
Deal found 9/13$138
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 10/24:35 pmPHX - MDW
Nonstop3h 23mFrontier
Fri 10/34:48 pmMDW - PHX
1 stop8h 06mFrontier
Deal found 9/14$138
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.
Thu 11/135:35 amPHX - ORD
1 stop6h 48mFrontier
Sun 11/163:30 pmORD - PHX
Nonstop4h 04mFrontier
Deal found 9/14$139
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/68:08 pmPHX - ORD
Nonstop3h 35mFrontier
Sun 11/93:30 pmORD - PHX
Nonstop4h 04mFrontier
Deal found 9/13$140
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 10/3010:43 pmPHX - MDW
1 stop10h 47mFrontier
Mon 11/38:30 amMDW - PHX
Nonstop3h 53mFrontier
Deal found 9/14$140
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 10/137:25 amPHX - ORD
Nonstop3h 33mFrontier
Mon 10/206:50 amORD - PHX
1 stop6h 02mFrontier
Deal found 9/13$141
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/134:20 pmPHX - MDW
Nonstop3h 26mFrontier
Mon 10/2010:56 pmMDW - PHX
Nonstop3h 51mFrontier
Deal found 9/13$141
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.
Thu 10/163:30 pmPHX - ORD
Nonstop3h 40mFrontier
Mon 10/206:23 pmORD - PHX
1 stop20h 54mFrontier
Deal found 9/14$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 10/2312:02 pmPHX - MDW
1 stop10h 34mFrontier
Sun 10/267:50 amMDW - PHX
Nonstop3h 50mFrontier
Deal found 9/14$143
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/307:45 pmPHX - ORD
Nonstop3h 30mFrontier
Thu 11/61:36 pmORD - PHX
1 stop10h 27mFrontier
Deal found 9/15$144

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 September 15, 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

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Fri 11/14

1:45 pm-5:50 pm

Nonstop3h 05m

Chicago Greater Rockford

Wed 11/19

2:05 pm-4:38 pm

Nonstop3h 33m

$152

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Sat 10/11

7:00 am-12:10 pm

Nonstop3h 10m

Chicago Greater Rockford

Sat 10/18

1:00 pm-2:31 pm

Nonstop3h 31m

$161

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Fri 10/24

3:25 pm-8:35 pm

Nonstop3h 10m

Chicago Greater Rockford

Fri 10/31

9:25 pm-10:56 pm

Nonstop3h 31m

$162

PhoenixChicago

PHX - MDW

PHXMDW

Phoenix Sky Harbor Intl

Fri 11/14

5:20 am-9:35 am

Nonstop3h 15m

Chicago Midway

Tue 11/18

10:05 am-1:05 pm

Nonstop4h 00m

$165

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Fri 10/24

3:25 pm-8:35 pm

Nonstop3h 10m

Chicago Greater Rockford

Mon 10/27

9:40 pm-11:11 pm

Nonstop3h 31m

$168

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Fri 9/26

2:49 pm-7:57 pm

Nonstop3h 08m

Chicago Greater Rockford

Fri 10/3

8:55 pm-10:26 pm

Nonstop3h 31m

$181

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Fri 10/3

2:55 pm-8:05 pm

Nonstop3h 10m

Chicago Greater Rockford

Fri 10/10

8:55 pm-10:26 pm

Nonstop3h 31m

$182

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Wed 10/15

2:56 pm-8:06 pm

Nonstop3h 10m

Chicago Greater Rockford

Sat 10/18

1:00 pm-2:31 pm

Nonstop3h 31m

$188

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Fri 9/26

2:49 pm-7:57 pm

Nonstop3h 08m

Chicago Greater Rockford

Mon 9/29

7:46 pm-9:15 pm

Nonstop3h 29m

$190

PhoenixChicago

PHX - MDW

PHXMDW

Phoenix Sky Harbor Intl

Fri 10/24

6:55 pm-12:10 am

Nonstop3h 15m

Chicago Midway

Fri 10/31

12:50 pm-2:35 pm

Nonstop3h 45m

$196

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

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 September 15, 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 September 15, 2025.

The most flights from PH1 to USIL are scheduled on a Monday (54 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (45 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 15, 2025.
See what other customers who have flown with Southwest, United Airlines, and American Airlines 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.
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Entertainment

7.5

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
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Entertainment

7.5

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
8,929 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Entertainment

7.5

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
4,242 reviews

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Entertainment

7.5

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
Allegiant Air
7.2
Good
699 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Entertainment

7.5

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
3,172 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Entertainment

7.5

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 Phoenix 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 to Illinois?

    Allegiant Air, Southwest, and United Airlines can get you from Phoenix to Illinois in just under 3h 05m. Your travel time will be generally consistent. The distance from Phoenix to Illinois is about 1371 mi. All flights are typically nonstop.

  • 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 ($65), Allegiant Air ($88), and Frontier ($99).

  • 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: SWISS (89%), Cathay Pacific (89%), Brussels Airlines( 87%).

  • What are the cheapest flights from Phoenix to Illinois?

    While on average a flight from Phoenix to Illinois is generally $866, our data shows the cheapest flight currently is $88. When looking at the most popular route, (Phoenix Sky Harbor Intl - Chicago O'Hare Intl), you can expect to pay $147 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 6 airlines flying from Phoenix to Illinois

Discover the top 6 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$78Average$208FlexibilityNo cancel feeOn-time65%
FrontierCheapest$99Average$215FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$128Average$220FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$149Average$320FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$189Average$445FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$202Average$344FlexibilityNo cancel feeOn-time63%

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