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$27+ 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 12/29. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ORD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
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 October 30, 2025.

Round-trip from

$136
(Kiwi.com)

One-way from

$27
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$249
From Phoenix to Illinois
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One-way flight from Phoenix to Illinois
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High demand for flights, 0% potential price rise
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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 October 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 October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Mon 12/297:55 amPHX - ORD
Nonstop3h 27mFrontier
Thu 1/19:33 pmORD - PHX
Nonstop3h 54mFrontier
Deal found 10/30$136
This CheapOair deal was found by Cheapflights users on 10/28. 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.
Thu 12/45:50 pmPHX - MDW
1 stop26h 38mFrontier
Sun 12/77:24 pmMDW - PHX
Nonstop4h 05mFrontier
Deal found 10/28$136
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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.
Fri 11/143:30 pmPHX - ORD
1 stop8h 29mFrontier
Tue 11/186:05 pmORD - PHX
1 stop16h 26mFrontier
Deal found 10/30$137
This Frontier deal was found by Cheapflights users on 10/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/137:45 amPHX - MDW
1 stop11h 59mFrontier
Sun 11/166:30 amMDW - PHX
1 stop8h 27mFrontier
Deal found 10/30$137
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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 12/253:40 pmPHX - ORD
Nonstop3h 43mFrontier
Thu 1/19:33 pmORD - PHX
Nonstop3h 54mFrontier
Deal found 10/30$138
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/124:13 pmPHX - ORD
Nonstop3h 42mFrontier
Fri 1/21:27 pmORD - PHX
Nonstop4h 08mFrontier
Deal found 10/28$139
This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/108:08 pmPHX - ORD
Nonstop3h 35mFrontier
Mon 11/173:30 pmORD - PHX
Nonstop4h 04mFrontier
Deal found 10/28$141
This Cheapflightsfares deal was found by Cheapflights users on 10/27. 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 12/267:55 amPHX - ORD
Nonstop3h 27mFrontier
Mon 12/291:32 pmORD - PHX
Nonstop4h 08mFrontier
Deal found 10/27$142
This Frontier deal was found by Cheapflights users on 10/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/233:53 pmPHX - ORD
Nonstop3h 35mFrontier
Thu 12/49:53 pmORD - PHX
Nonstop3h 54mFrontier
Deal found 10/28$143
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/102:30 pmPHX - MDW
1 stop22h 34mFrontier
Sun 12/147:24 pmMDW - PHX
Nonstop4h 05mFrontier
Deal found 10/28$143
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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.
Fri 11/1410:53 pmPHX - ORD
1 stop23h 36mFrontier
Sun 11/1610:43 pmORD - PHX
1 stop23h 08mFrontier
Deal found 10/30$144
This Priceline deal was found by Cheapflights users on 10/30. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/146:00 amPHX - MDW
1 stop11h 39mFrontier
Sun 11/166:30 amMDW - PHX
1 stop8h 27mFrontier
Deal found 10/30$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 October 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

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Fri 11/14

1:45 pm-5:50 pm

Nonstop3h 05m

Chicago Greater Rockford

Mon 11/17

6:40 pm-9:10 pm

Nonstop3h 30m

$162

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Wed 12/10

9:00 am-1:09 pm

Nonstop3h 09m

Chicago Greater Rockford

Fri 12/12

6:56 pm-9:28 pm

Nonstop3h 32m

$178

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Fri 12/12

1:57 pm-6:06 pm

Nonstop3h 09m

Chicago Greater Rockford

Mon 12/15

6:56 pm-9:28 pm

Nonstop3h 32m

$188

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Wed 12/10

9:05 am-1:30 pm

Nonstop3h 25m

Chicago O'Hare Intl

Sat 12/13

3:05 pm-6:00 pm

Nonstop3h 55m

$199

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

Thu 12/4

6:30 pm-10:20 pm

Nonstop2h 50m

Lambert-St Louis

Mon 12/8

5:25 pm-7:50 pm

Nonstop3h 25m

$209

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Fri 1/16

11:59 pm-9:40 am

1 stop8h 41m

Chicago O'Hare Intl

Mon 1/19

6:43 pm-12:44 am

1 stop7h 01m

$221

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Sat 12/13

1:45 pm-6:18 pm

Nonstop3h 33m

Chicago O'Hare Intl

Wed 1/21

1:55 pm-7:45 pm

1 stop6h 50m

$228

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Sun 12/7

11:55 pm-10:00 am

1 stop9h 05m

Chicago O'Hare Intl

Wed 12/10

6:00 pm-12:16 am

1 stop7h 16m

$228

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Mon 12/8

10:55 am-6:45 pm

1 stop6h 50m

Chicago O'Hare Intl

Sat 12/13

9:49 am-3:41 pm

1 stop6h 52m

$228

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Fri 12/5

12:59 am-10:33 am

1 stop8h 34m

Chicago O'Hare Intl

Fri 12/12

5:07 pm-10:39 pm

1 stop6h 32m

$228

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

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, December is the cheapest month in which you can book a flight from Phoenix to Illinois (average of $64). Flying from Phoenix to Illinois in June is currently the most expensive (average of $178). 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 October 30, 2025.

A simple way to save on the total cost of your ticket is to fly from Phoenix to Illinois in the afternoon. If you’re flexible enough to do this you can expect to save up to 18% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Phoenix to Illinois?

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

Travelers seeking maximum savings on their Phoenix to Illinois flight should consider departing on Wednesday mornings when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 October 30, 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
4,243 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Comfort

8.0

Food

7.0

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
4,243 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Comfort

8.0

Food

7.0

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
8,996 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Comfort

8.0

Food

7.0

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
11,034 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Comfort

8.0

Food

7.0

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
694 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Comfort

8.0

Food

7.0

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
3,123 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Comfort

8.0

Food

7.0

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 Delta can get you from Phoenix to Illinois in just under 3h 05m. Your travel time can differ by up to 5h 36m. The distance from Phoenix to Illinois is about 1371 mi. This flight may include one or multiple stops.

  • 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 Allegiant Air ($96), Southwest ($100), and United Airlines ($105).

  • 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: Aer Lingus (86%), Brussels Airlines (85%), Royal Jordanian( 84%).

  • What are the cheapest flights from Phoenix to Illinois?

    While on average a flight from Phoenix to Illinois is generally $936, our data shows the cheapest flight currently is $75. When looking at the most popular route, (Phoenix Sky Harbor Intl - Chicago O'Hare Intl), you can expect to pay $83 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, December is the cheapest month in which you can book a flight from Phoenix to Illinois (average of $64). Flying from Phoenix to Illinois in June is currently the most expensive (average of $178). 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$79Average$218FlexibilityNo cancel feeOn-time65%
FrontierCheapest$100Average$214FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$128Average$210FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$149Average$336FlexibilityNo cancel feeOn-time69%
DeltaCheapest$162Average$355FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$197Average$446FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$206Average$346FlexibilityNo cancel feeOn-time63%

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