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$79+ 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 4/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ORD
Mar 30 — Apr 61
Sun 3/30
Sun 4/6
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 March 25, 2025.

Round-trip from

$138
(CheapOair)

One-way from

$79
(Cheapflightsfares)

Popular in

December

Cheapest in

September

Average price

$259
From Phoenix to Illinois
Search Deals
One-way flight from Phoenix to Illinois
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($34 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 25, 2025.

This CheapOair deal was found by Cheapflights users on 3/24. 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 4/2410:43 amPHX - ORD
Nonstop3h 36mFrontier
Sat 4/261:34 pmORD - PHX
Nonstop4h 10mFrontier
Deal found 3/24$138
This CheapOair deal was found by Cheapflights users on 3/24. 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 4/246:00 amPHX - MDW
Nonstop3h 21mFrontier
Sat 4/2612:19 pmMDW - PHX
Nonstop3h 57mFrontier
Deal found 3/24$138
This eDestinos deal was found by Cheapflights users on 3/23. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/102:34 pmPHX - ORD
1 stop13h 59mSpirit Airlines
Mon 4/147:41 amORD - PHX
1 stop7h 47mSpirit Airlines
Deal found 3/23$145
This Kiwi.com deal was found by Cheapflights users on 3/24. 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 8/2010:10 amAZA - RFD
Nonstop3h 05mAllegiant Air
Wed 8/274:05 pmRFD - AZA
Nonstop3h 33mAllegiant Air
Deal found 3/24$147
This Booking.com deal was found by Cheapflights users on 3/24. 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 4/2410:43 amPHX - ORD
Nonstop3h 36mMultiple Airlines
Mon 4/287:41 amORD - PHX
1 stop7h 47mMultiple Airlines
Deal found 3/24$155
This American Airlines deal was found by Cheapflights users on 3/23. 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.
Wed 4/165:00 amPHX - ORD
Nonstop3h 34mAmerican Airlines
Wed 4/2310:00 pmORD - PHX
Nonstop3h 59mAmerican Airlines
Deal found 3/23$189
This Southwest deal was found by Cheapflights users on 3/22. 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 5/76:30 pmPHX - MDW
Nonstop3h 20mSouthwest
Sat 5/1010:45 amMDW - PHX
Nonstop3h 55mSouthwest
Deal found 3/22$199
This American Airlines deal was found by Cheapflights users on 3/23. 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.
Tue 4/151:09 amPHX - MLI
1 stop7h 42mAmerican Airlines
Tue 4/223:24 pmMLI - PHX
1 stop6h 19mAmerican Airlines
Deal found 3/23$209
This American Airlines deal was found by Cheapflights users on 3/23. 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 5/107:36 amPHX - PIA
1 stop5h 28mAmerican Airlines
Sat 5/315:05 pmPIA - PHX
1 stop5h 47mAmerican Airlines
Deal found 3/23$209
This United Airlines deal was found by Cheapflights users on 3/23. 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.
Sat 4/127:15 amPHX - ORD
Nonstop3h 31mUnited Airlines
Sat 5/39:25 amORD - PHX
Nonstop4h 06mUnited Airlines
Deal found 3/23$214
This United Airlines deal was found by Cheapflights users on 3/23. 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.
Wed 4/166:00 amPHX - MLI
2 stops7h 11mUnited Airlines
Tue 4/223:50 pmMLI - PHX
1 stop8h 01mUnited Airlines
Deal found 3/23$214
This Hawaiian Airlines deal was found by Cheapflights users on 3/24. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/39:00 amPHX - ORD
1 stop8h 10mHawaiian Airlines
Tue 5/66:00 amORD - PHX
1 stop10h 12mHawaiian Airlines
Deal found 3/24$226

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 March 25, 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 4/24

10:43 am-4:19 pm

Nonstop3h 36m

Chicago O'Hare Intl

Sat 4/26

1:34 pm-3:44 pm

Nonstop4h 10m

$138

PhoenixChicago

PHX - MDW

PHXMDW

Phoenix Sky Harbor Intl

Sat 5/3

6:00 am-11:23 am

Nonstop3h 23m

Chicago Midway

Tue 5/6

12:19 pm-2:13 pm

Nonstop3h 54m

$138

PhoenixChicago

AZA - RFD

AZARFD

Phoenix-Mesa Gateway

Wed 8/20

10:10 am-3:15 pm

Nonstop3h 05m

Chicago Greater Rockford

Wed 8/27

4:05 pm-5:38 pm

Nonstop3h 33m

$147

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Thu 4/24

10:43 am-4:19 pm

Nonstop3h 36m

Chicago O'Hare Intl

Mon 4/28

7:41 am-1:28 pm

1 stop7h 47m

$155

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Thu 4/10

2:34 pm-6:33 am

1 stop13h 59m

Chicago O'Hare Intl

Mon 4/14

7:41 am-1:28 pm

1 stop7h 47m

$159

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Tue 4/15

1:09 am-6:32 am

Nonstop3h 23m

Chicago O'Hare Intl

Wed 4/23

6:00 am-7:55 am

Nonstop3h 55m

$189

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Wed 4/30

12:45 pm-6:20 pm

Nonstop3h 35m

Chicago O'Hare Intl

Mon 5/5

8:07 pm-10:13 pm

Nonstop4h 06m

$208

PhoenixChicago

PHX - MDW

PHXMDW

Phoenix Sky Harbor Intl

Fri 5/2

7:45 pm-1:05 am

Nonstop3h 20m

Chicago Midway

Tue 5/6

8:50 pm-10:35 pm

Nonstop3h 45m

$208

PhoenixMoline

PHX - MLI

PHXMLI

Phoenix Sky Harbor Intl

Tue 4/15

1:09 am-10:51 am

1 stop7h 42m

Moline Quad-City

Tue 4/22

3:24 pm-7:43 pm

1 stop6h 19m

$209

PhoenixPeoria

PHX - PIA

PHXPIA

Phoenix Sky Harbor Intl

Sat 5/10

7:36 am-3:04 pm

1 stop5h 28m

Greater Peoria

Sat 5/31

5:05 pm-8:52 pm

1 stop5h 47m

$209

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

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 $323). 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 March 25, 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 March 25, 2025.

The most flights from PH1 to USIL are scheduled on a Tuesday (47 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (4 on average).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 March 25, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from Phoenix to Illinois by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,785 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.9

Crew

8.5

Food

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,785 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.9

Crew

8.5

Food

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,272 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.9

Crew

8.5

Food

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,890 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.9

Crew

8.5

Food

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,330 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.9

Crew

8.5

Food

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,605 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.9

Crew

8.5

Food

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 Spirit Airlines ($79), Frontier ($81), and United Airlines ($90).

  • 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: Japan Airlines (98%), Cathay Pacific (97%), Brussels Airlines( 95%).

  • What are the cheapest flights from Phoenix to Illinois?

    While on average a flight from Phoenix to Illinois is generally $1,673, our data shows the cheapest flight currently is $68. When looking at the most popular route, (Phoenix Sky Harbor Intl - Chicago O'Hare Intl), you can expect to pay $159 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 $323). 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 March 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$61Average$179FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$73Average$196FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$139Average$240FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$163Average$389FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$168Average$485FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$189Average$397FlexibilityNo cancel feeOn-time63%
DeltaCheapest$216Average$322FlexibilityNo cancel feeOn-timeN/A
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