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Cheap flights from Phoenix Sky Harbor Intl Airport to Illinois from $79

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Phoenix Sky Harbor Intl Airport to Illinois departing on 5/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Phoenix Sky Harbor Intl Airport to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:07 pm - 6:08 am
PHX
-
ORD
8h 01m
1 stop
Frontier Logo
7:50 am - 10:12 am
ORD
-
PHX
4h 22mnonstop
$132Frontier
Thu, Apr 23 - Mon, Apr 27
Frontier Logo
9:37 am - 3:04 pm
PHX
-
MDW
3h 27mnonstop
Frontier Logo
6:20 am - 8:17 am
MDW
-
PHX
3h 57mnonstop
$132Frontier
Thu, Apr 23 - Sun, Apr 26
American Airlines Logo
5:00 am - 3:59 pm
PHX
-
MLI
8h 59m
1 stop
American Airlines Logo
4:45 pm - 11:01 pm
MLI
-
PHX
8h 16m
1 stop
$299American Airlines
Tue, Jun 30 - Tue, Jul 7
American Airlines Logo
5:05 am - 12:52 pm
PHX
-
PIA
5h 47m
1 stop
American Airlines Logo
7:05 pm - 11:59 pm
PIA
-
PHX
6h 54m
1 stop
$320American Airlines
Sat, May 2 - Mon, May 4
Delta Logo
5:45 am - 4:28 pm
PHX
-
MLI
8h 43m
1 stop
Delta Logo
5:11 pm - 10:44 pm
MLI
-
PHX
7h 33m
1 stop
$324Delta
Tue, Apr 21 - Sat, May 2
Multiple Airlines Logo
8:07 pm - 11:29 am
PHX
-
MLI
13h 22m
1 stop
Multiple Airlines Logo
12:19 pm - 2:04 pm
MLI
-
PHX
27h 45m
2 stops
$328Multiple Airlines
Wed, Apr 22 - Thu, Apr 30
United Airlines Logo
11:30 pm - 9:06 am
PHX
-
CMI
7h 36m
1 stop
United Airlines Logo
7:36 pm - 11:53 pm
CMI
-
PHX
6h 17m
1 stop
$338United Airlines
Thu, May 14 - Sun, May 17
United Airlines Logo
11:50 pm - 8:57 am
PHX
-
DEC
7h 07m
1 stop
United Airlines Logo
6:55 pm - 11:17 pm
DEC
-
PHX
6h 22m
1 stop
$344United Airlines
Sat, Jun 6 - Sat, Oct 3
Multiple Airlines Logo
8:07 pm - 11:29 am
PHX
-
MLI
13h 22m
1 stop
Multiple Airlines Logo
12:19 pm - 11:49 pm
MLI
-
PHX
13h 30m
1 stop
$348Multiple Airlines
Wed, Apr 22 - Thu, Apr 30
Delta Logo
12:15 pm - 10:21 pm
PHX
-
MLI
8h 06m
1 stop
Delta Logo
5:17 pm - 10:36 pm
MLI
-
PHX
7h 19m
1 stop
$349Delta
Wed, May 27 - Wed, Jun 3

Frontier flights from Phoenix Sky Harbor Intl Airport to Illinois

Our best Frontier deals on Phoenix Sky Harbor Intl Airport to Illinois flight tickets
Frontier
Apr 23
PHX12:50 pmPhoenix Sky Harbor Intl
10h 02m
1 stop
ORD12:52 amChicago O'Hare Intl
Apr 27
ORD7:50 amChicago O'Hare Intl
4h 22m
PHX10:12 amPhoenix Sky Harbor Intl
$132
Frontier
Apr 24
PHX10:29 pmPhoenix Sky Harbor Intl
11h 04m
1 stop
ORD11:33 amChicago O'Hare Intl
Apr 26
ORD7:50 amChicago O'Hare Intl
4h 22m
PHX10:12 amPhoenix Sky Harbor Intl
$133
Frontier
Apr 17
PHX10:29 pmPhoenix Sky Harbor Intl
11h 04m
1 stop
ORD11:33 amChicago O'Hare Intl
Apr 26
ORD7:50 amChicago O'Hare Intl
4h 22m
PHX10:12 amPhoenix Sky Harbor Intl
$134

United Airlines flights from Phoenix Sky Harbor Intl Airport to Illinois

Our best United Airlines deals on Phoenix Sky Harbor Intl Airport to Illinois flight tickets
United Airlines
Apr 23
PHX11:59 pmPhoenix Sky Harbor Intl
3h 30m
ORD5:29 amChicago O'Hare Intl
Apr 28
ORD7:20 amChicago O'Hare Intl
4h 02m
PHX9:22 amPhoenix Sky Harbor Intl
$182
United Airlines
Apr 25
PHX2:48 pmPhoenix Sky Harbor Intl
6h 14m
1 stop
MLI11:02 pmMoline Quad-City
Apr 28
MLI10:35 amMoline Quad-City
8h 19m
2 stops
PHX4:54 pmPhoenix Sky Harbor Intl
$329
United Airlines
May 14
PHX11:30 pmPhoenix Sky Harbor Intl
7h 36m
1 stop
CMI9:06 amChampaign University-Willard
May 17
CMI7:36 pmChampaign University-Willard
6h 17m
1 stop
PHX11:53 pmPhoenix Sky Harbor Intl
$338

momondo Fare Finder

 
Customize your flight search to find flights from Phoenix Sky Harbor Intl Airport 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, momondo users made 832,500 searches. Data last updated March 30, 2026.
Use the filters below to find and compare flights from Phoenix Sky Harbor Intl Airport to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhoenixChicago

PHX - ORD

PHXORD

Phoenix Sky Harbor Intl

Thu 4/23

8:07 pm-6:08 am

1 stop8h 01m

Chicago O'Hare Intl

Mon 4/27

7:50 am-10:12 am

Nonstop4h 22m

$132
Quickest round-trip

PhoenixChicago

PHX - MDW

PHXMDW

Phoenix Sky Harbor Intl

Thu 4/23

9:37 am-3:04 pm

Nonstop3h 27m

Chicago Midway

Sun 4/26

6:20 am-8:17 am

Nonstop3h 57m

$132

PhoenixMoline

PHX - MLI

PHXMLI

Phoenix Sky Harbor Intl

Tue 6/30

5:00 am-3:59 pm

1 stop8h 59m

Moline Quad-City

Tue 7/7

4:45 pm-11:01 pm

1 stop8h 16m

$299

PhoenixPeoria

PHX - PIA

PHXPIA

Phoenix Sky Harbor Intl

Sat 5/2

5:05 am-12:52 pm

1 stop5h 47m

Greater Peoria

Mon 5/4

7:05 pm-11:59 pm

1 stop6h 54m

$320

PhoenixMoline

PHX - MLI

PHXMLI

Phoenix Sky Harbor Intl

Tue 4/21

5:45 am-4:28 pm

1 stop8h 43m

Moline Quad-City

Sat 5/2

5:11 pm-10:44 pm

1 stop7h 33m

$324

PhoenixMoline

PHX - MLI

PHXMLI

Phoenix Sky Harbor Intl

Wed 4/22

8:07 pm-11:29 am

1 stop13h 22m

Moline Quad-City

Thu 4/30

12:19 pm-2:04 pm

2 stops27h 45m

$328

PhoenixChampaign

PHX - CMI

PHXCMI

Phoenix Sky Harbor Intl

Thu 5/14

11:30 pm-9:06 am

1 stop7h 36m

Champaign University-Willard

Sun 5/17

7:36 pm-11:53 pm

1 stop6h 17m

$338

PhoenixDecatur

PHX - DEC

PHXDEC

Phoenix Sky Harbor Intl

Sat 6/6

11:50 pm-8:57 am

1 stop7h 07m

Decatur Arpt

Sat 10/3

6:55 pm-11:17 pm

1 stop6h 22m

$344

PhoenixMoline

PHX - MLI

PHXMLI

Phoenix Sky Harbor Intl

Wed 4/22

8:07 pm-11:29 am

1 stop13h 22m

Moline Quad-City

Thu 4/30

12:19 pm-11:49 pm

1 stop13h 30m

$348

PhoenixMoline

PHX - MLI

PHXMLI

Phoenix Sky Harbor Intl

Wed 5/27

12:15 pm-10:21 pm

1 stop8h 06m

Moline Quad-City

Wed 6/3

5:17 pm-10:36 pm

1 stop7h 19m

$349

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

How to get the cheapest flight ticket from Phoenix Sky Harbor Intl Airport to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Phoenix Sky Harbor Intl Airport is in February. Flight prices, which tend to average around $197, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $208.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Phoenix Sky Harbor Intl Airport to Illinois is on a Thursday when prices can be found for as low as $340. Flights from Phoenix Sky Harbor Intl Airport to Illinois on a Sunday will generally be more expensive and average around $503. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Phoenix Sky Harbor Intl Airport to Illinois during this time can be as low as $297. Flights in the morning are often more expensive with an average ticket price of $423.

What is the cheapest Phoenix Sky Harbor Intl to Illinois flight route?

Fly from Phoenix Sky Harbor Intl to Chicago O'Hare Intl for the best Phoenix Sky Harbor Intl - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Phoenix Sky Harbor Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $271 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Phoenix Sky Harbor Intl Airport for as low as $224 on momondo.

What cabin class options are available on Phoenix Sky Harbor Intl to Illinois flights?

There are 4 cabin classes available to choose from on Phoenix Sky Harbor Intl to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Phoenix Sky Harbor Intl Airport to Illinois flights?

You could potentially save up to 8% on your flight if you consider stops on a Phoenix Sky Harbor Intl Airport to Illinois flight.

Cheap Phoenix Sky Harbor Intl Airport to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Phoenix Sky Harbor Intl Airport to Illinois

Best Price Found

$169

Fastest flight time

2h 50m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Phoenix Sky Harbor Intl Airport in the past 72 hours is $169. The best round-trip flight deal from Phoenix Sky Harbor Intl Airport to Illinois found on momondo in the last 72 hours is $293.
The fastest flight from Phoenix Sky Harbor Intl Airport to Illinois takes 2h 50m
Direct flights go from Phoenix Sky Harbor Intl Airport to Illinois every day.
There are 98 airports in Illinois. From Phoenix Sky Harbor Intl Airport there are direct flights to Chicago Midway (MDW), Lambert-St Louis (STL).
Search flight deals

  • When did momondo last update prices for flights from Phoenix Sky Harbor Intl Airport to Illinois?

    Prices for flights from Phoenix Sky Harbor Intl Airport to Illinois refresh daily.

  • How many operators does momondo search for flights from Phoenix Sky Harbor Intl Airport to Illinois?

  • How old do you have to be to fly from Phoenix Sky Harbor Intl Airport to Illinois?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Phoenix Sky Harbor Intl Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Phoenix Sky Harbor Intl Airport to Illinois?

Best airlines flying from Phoenix Sky Harbor Intl Airport to Illinois

Compare and see reviews for airlines that fly from Phoenix Sky Harbor Intl Airport to Illinois with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $65Free CancellationRating
5.7
3,010 reviews
Search Frontier flights
DeltaPriceFrom $118Free CancellationRating
7.9
8,359 reviews
Search Delta flights
United AirlinesPriceFrom $149Free CancellationRating
7.4
9,510 reviews
Search United Airlines flights
SouthwestPriceFrom $187Free CancellationRating
8.0
4,331 reviews
Search Southwest flights
American AirlinesPriceFrom $197Free CancellationRating
7.1
11,524 reviews
Search American Airlines flights
Alaska AirlinesPriceFrom $210Free CancellationRating
7.9
12,137 reviews
Search Alaska Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Phoenix to Illinois?

It is quick and easy to find Phoenix to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.

Can I find flights from Phoenix to Illinois with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Illinois from Phoenix with this policy.

How can momondo help me find flights from Phoenix to Illinois?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Phoenix.

I’m not ready to book a flight from Phoenix to Illinois right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Phoenix to Illinois flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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