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$38+ Cheap flights from Sky Harbor Intl (PHX) 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 3/25. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ORD
feb. 25 — mar. 41
mar. 2/25
mar. 3/4
1 adult, Economy
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Cheap flight deals from Sky Harbor Intl to Illinois

Keep the following information in mind while searching for Sky Harbor Intl to Illinois flight deals. Data was last updated febrero 20, 2025.

Round-trip from

$120
(Cheapflightsfares)

One-way from

$38
(Trip.com)

Popular in

December

Cheapest in

April

Average price

$219

Good round-trip deal

$209 or less

Good one-way deal

$159 or less
From Phoenix Sky Harbor Intl to Illinois
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One-way flight from Phoenix Sky Harbor Intl to Illinois
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Highest demand for flights based on searches. 14% potential increase in price ($37 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Price to beat on a round-trip flight from Phoenix Sky Harbor Intl to Illinois.
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Price to beat on a one-way flight from Phoenix Sky Harbor Intl to Illinois.
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Find flight deals from Sky Harbor Intl to Illinois

Cheapest flights from Sky Harbor Intl to Illinois
Explore the most affordable flight options available from Sky Harbor Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on febrero 20, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 2/19. 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.
vie. 4/44:39 pmPHX - MDW
Nonstop3h 21mFrontier
mar. 4/87:25 amMDW - PHX
Nonstop3h 56mFrontier
Deal found 2/19$120
This Mytrip deal was found by Cheapflights users on 2/19. 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.
mar. 3/187:02 pmPHX - ORD
2 stops19h 25mSpirit Airlines
mar. 3/259:57 pmORD - PHX
1 stop26h 05mSpirit Airlines
Deal found 2/19$121
This Frontier deal was found by Cheapflights users on 2/19. 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.
mar. 4/17:39 pmPHX - ORD
Nonstop3h 24mFrontier
mar. 4/84:26 pmORD - PHX
Nonstop4h 08mFrontier
Deal found 2/19$123
This Kiwi.com deal was found by Cheapflights users on 2/20. 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.
mié. 3/265:15 amPHX - ORD
1 stop5h 38mMultiple Airlines
mié. 4/28:00 amORD - PHX
Nonstop4h 07mMultiple Airlines
Deal found 2/20$125
This Mytrip deal was found by Cheapflights users on 2/18. 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.
sáb. 3/1510:51 pmPHX - STL
1 stop22h 58mFrontier
lun. 3/176:55 pmSTL - PHX
1 stop28h 33mFrontier
Deal found 2/18$159
This Expedia deal was found by Cheapflights users on 2/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/189:15 pmPHX - STL
1 stop10h 01mMultiple Airlines
mar. 4/13:11 pmSTL - PHX
1 stop11h 01mMultiple Airlines
Deal found 2/20$227
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/1610:35 pmPHX - ORD
1 stop9h 28mDelta
mar. 4/223:30 pmORD - PHX
1 stop9h 07mDelta
Deal found 2/20$237
This Delta deal was found by Cheapflights users on 2/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/256:00 amPHX - MDW
1 stop6h 15mDelta
mié. 4/21:16 pmMDW - PHX
1 stop9h 05mDelta
Deal found 2/19$237
This Southwest deal was found by Cheapflights users on 2/20. 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.
mié. 4/27:10 pmPHX - MDW
Nonstop3h 15mSouthwest
jue. 4/310:40 pmMDW - PHX
Nonstop3h 50mSouthwest
Deal found 2/20$261
This American Airlines deal was found by Cheapflights users on 2/20. 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.
jue. 4/241:04 amPHX - MLI
1 stop7h 47mAmerican Airlines
lun. 4/286:30 pmMLI - PHX
1 stop6h 26mAmerican Airlines
Deal found 2/20$269
This United Airlines deal was found by Cheapflights users on 2/20. 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.
vie. 4/2511:59 pmPHX - MLI
1 stop8h 13mUnited Airlines
lun. 4/285:25 pmMLI - PHX
1 stop6h 26mUnited Airlines
Deal found 2/20$270
This Mytrip deal was found by Cheapflights users on 2/19. 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.
jue. 3/68:02 pmPHX - EVV
2 stops21h 40mMultiple Airlines
lun. 3/107:22 pmEVV - PHX
2 stops24h 45mMultiple Airlines
Deal found 2/19$277

Find flights from Sky Harbor Intl to Illinois within your budget

Customize your flight search to find flights from Sky Harbor Intl 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 febrero 20, 2025.

Fly from

Sky Harbor Intl

Fly to

Illinois

Route

Depart

Return

Price

PhoenixChicago

PHX - MDW

PHXMDW

Phoenix Sky Harbor Intl

vie. 4/4

4:39 pm-10:00 pm

Nonstop3h 21m

Chicago Midway

mar. 4/8

7:25 am-9:21 am

Nonstop3h 56m

$120

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

mar. 3/18

7:02 pm-4:27 pm

2 stops19h 25m

Chicago O'Hare Intl

mar. 3/25

9:57 pm-10:02 pm

1 stop26h 05m

$121

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

mar. 4/1

7:39 pm-1:03 am

Nonstop3h 24m

Chicago O'Hare Intl

mar. 4/8

4:26 pm-6:34 pm

Nonstop4h 08m

$123

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

mié. 3/26

5:15 am-12:53 pm

1 stop5h 38m

Chicago O'Hare Intl

mié. 4/2

8:00 am-10:07 am

Nonstop4h 07m

$125

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

sáb. 3/15

10:51 pm-11:49 pm

1 stop22h 58m

Lambert-St Louis

lun. 3/17

6:55 pm-9:28 pm

1 stop28h 33m

$159

PhoenixSt. Louis

PHX - STL

PHXSTL

Phoenix Sky Harbor Intl

mar. 3/18

9:15 pm-9:16 am

1 stop10h 01m

Lambert-St Louis

mar. 4/1

3:11 pm-12:12 am

1 stop11h 01m

$227

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

mié. 4/16

10:35 pm-10:03 am

1 stop9h 28m

Chicago O'Hare Intl

mar. 4/22

3:30 pm-10:37 pm

1 stop9h 07m

$237

PhoenixChicago

PHX - MDW

PHXMDW

Phoenix Sky Harbor Intl

mar. 3/25

6:00 am-2:15 pm

1 stop6h 15m

Chicago Midway

mié. 4/2

1:16 pm-8:21 pm

1 stop9h 05m

$237

PhoenixChicago

PHX - MDW

PHXMDW

Phoenix Sky Harbor Intl

mié. 4/2

7:10 pm-12:25 am

Nonstop3h 15m

Chicago Midway

jue. 4/3

10:40 pm-12:30 am

Nonstop3h 50m

$261

PhoenixMoline

PHX - MLI

PHXMLI

Phoenix Sky Harbor Intl

jue. 4/24

1:04 am-10:51 am

1 stop7h 47m

Moline Quad-City

lun. 4/28

6:30 pm-10:56 pm

1 stop6h 26m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 60 results
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Best time to book a flight from Sky Harbor Intl to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Sky Harbor Intl 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.

Travel insights for flights from Sky Harbor Intl to Illinois

Get recent, data-driven insights about flights from Sky Harbor Intl to Illinois including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Phoenix Sky Harbor Intl Airport to Illinois?

Currently, August is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Illinois (average of $245). Flying from Phoenix Sky Harbor Intl Airport 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 Sky Harbor Intl 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 febrero 20, 2025.

When flying from Phoenix Sky Harbor Intl Airport 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 Sky Harbor Intl Airport to Illinois

Explore weekly flight availability from Sky Harbor Intl 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 febrero 20, 2025.

The most flights from PHX to USIL are scheduled on a Thursday (46 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (29 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 febrero 20, 2025.
To help decide which airline to fly from Phoenix to Illinois, see what other customers have to say about Southwest, Alaska Airlines and Delta. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Alaska Airlines
8.0
Very good
9,697 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,219 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Hawaiian Airlines
7.9
Good
2,317 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,765 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Crew

8.7

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Related info for your journey

Find useful and relevant information for your journey from Sky Harbor Intl 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 Sky Harbor Intl Airport to Illinois one-way?

    One-way options have recently been found by users for as low as $38 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $80 and American Airlines from $105 one-way.

  • What are the most popular routes from Phoenix Sky Harbor Intl Airport to Illinois?

    While some choose either Phoenix Sky Harbor Intl - Chicago Midway or Phoenix Sky Harbor Intl - Lambert-St Louis, Phoenix Sky Harbor Intl - Chicago O'Hare Intl is the most popular route from Phoenix Sky Harbor Intl Airport to Illinois.

  • What are the most reliable airlines from Phoenix Sky Harbor Intl Airport to Illinois?

    The top 3 most reliable airlines when flying from Phoenix Sky Harbor Intl Airport to Illinois are Japan Airlines (97%), Emirates (97%) and Brussels Airlines (97%).

  • What are the cheapest flights from Phoenix Sky Harbor Intl Airport to Illinois?

    Looking at all options, your cheapest flight can be booked for $70. While the most popular route (Phoenix Sky Harbor Intl - Chicago O'Hare Intl) can be booked for $92 on average our data indicates $1,082 when flying from Phoenix Sky Harbor Intl Airport to Illinois.

  • Can I find deals for flights from Sky Harbor Intl to Illinois that include hotel bookings?

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

  • How can I find direct flights from Sky Harbor Intl to Illinois?

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

  • Can I find deals for business class flights from Sky Harbor Intl to Illinois?

    Yes. Cheapflights offers flight deals from Sky Harbor Intl 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 Sky Harbor Intl Airport to Illinois?

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

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Alternative routes for Sky Harbor Intl 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 Sky Harbor Intl to Illinois

Discover the top 7 airlines that operate flights from Sky Harbor Intl 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 febrero 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$60Average$166FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$65Average$194FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$163Average$492FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$163Average$422FlexibilityNo cancel feeOn-time69%
Allegiant AirCheapest$174Average$250FlexibilityNo cancel feeOn-time88%
SouthwestCheapest$185Average$380FlexibilityNo cancel feeOn-time63%
DeltaCheapest$216Average$332FlexibilityNo cancel feeOn-timeN/A
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