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Cheap flights from Illinois to Arizona from $49

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Arizona departing on 10/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Illinois to Arizona

Cheap round-trip flights

Frontier Logo
4:51 pm - 6:30 pmSTL-LAS
3h 39mnonstop
Frontier Logo
10:30 am - 3:56 pmLAS-STL
3h 26mnonstop
$135Frontier
Find Deal
Sat, Oct 25 - Sat, Nov 1
Frontier Logo
2:38 pm - 4:16 pmSTL-LAS
3h 38mnonstop
Frontier Logo
6:20 am - 11:43 amLAS-STL
3h 23mnonstop
$136Frontier
Find Deal
Sun, Oct 5 - Fri, Oct 10
Allegiant Air Logo
8:04 pm - 10:34 pmRFD-AZA
3h 30mnonstop
Allegiant Air Logo
1:45 pm - 5:50 pmAZA-RFD
3h 05mnonstop
$150Allegiant Air
Find Deal
Wed, Nov 5 - Fri, Nov 7
Allegiant Air Logo
9:25 pm - 10:56 pmRFD-AZA
3h 31mnonstop
Allegiant Air Logo
1:45 pm - 5:50 pmAZA-RFD
3h 05mnonstop
$151Allegiant Air
Find Deal
Fri, Oct 31 - Fri, Nov 7
United Airlines Logo
7:37 pm - 9:49 pmORD-LAS
4h 12mnonstop
United Airlines Logo
11:59 pm - 5:33 amLAS-ORD
3h 34mnonstop
$159United Airlines
Find Deal
Sat, Nov 8 - Tue, Nov 11
Southwest Logo
9:50 pm - 11:40 pmMDW-LAS
3h 50mnonstop
Southwest Logo
5:40 am - 11:10 amLAS-MDW
3h 30mnonstop
$159Southwest
Find Deal
Sun, Oct 26 - Wed, Oct 29
Southwest Logo
7:10 am - 9:05 amMDW-LAS
3h 55mnonstop
Southwest Logo
5:40 am - 11:10 amLAS-MDW
3h 30mnonstop
$169Southwest
Find Deal
Wed, Oct 22 - Wed, Oct 29
United Airlines Logo
4:15 pm - 6:13 pmORD-LAS
3h 58mnonstop
United Airlines Logo
11:59 pm - 5:33 amLAS-ORD
3h 34mnonstop
$183United Airlines
Find Deal
Sat, Oct 25 - Mon, Oct 27
American Airlines Logo
5:00 am - 7:50 amORD-PHX
3h 50mnonstop
American Airlines Logo
7:00 am - 11:32 amPHX-ORD
3h 32mnonstop
$189American Airlines
Find Deal
Wed, Dec 17 - Wed, Dec 24
American Airlines Logo
8:50 pm - 11:52 pmORD-PHX
4h 02mnonstop
American Airlines Logo
5:00 am - 9:27 amPHX-ORD
3h 27mnonstop
$190American Airlines
Find Deal
Wed, Nov 5 - Sat, Nov 8

Frontier flights from Illinois to Arizona

Our best Frontier deals on Illinois to Arizona flight tickets
Frontier
Oct 25
STL4:51 pmLambert-St Louis
3h 39m
LAS6:30 pmLas Vegas Harry Reid Intl
Nov 1
LAS10:30 amLas Vegas Harry Reid Intl
3h 26m
STL3:56 pmLambert-St Louis
$135
Find similar
Frontier
Oct 5
STL2:38 pmLambert-St Louis
3h 38m
LAS4:16 pmLas Vegas Harry Reid Intl
Oct 10
LAS6:20 amLas Vegas Harry Reid Intl
3h 23m
STL11:43 amLambert-St Louis
$136
Find similar
Frontier
Oct 5
STL2:38 pmLambert-St Louis
3h 38m
LAS4:16 pmLas Vegas Harry Reid Intl
Oct 7
LAS12:59 amLas Vegas Harry Reid Intl
6h 08m
1 stop
STL9:07 amLambert-St Louis
$138
Find similar

Spirit Airlines flights from Illinois to Arizona

Our best Spirit Airlines deals on Illinois to Arizona flight tickets
Spirit Airlines
Dec 4
ORD8:30 pmChicago O'Hare Intl
4h 05m
LAS10:35 pmLas Vegas Harry Reid Intl
Dec 6
LAS12:50 amLas Vegas Harry Reid Intl
3h 35m
ORD6:25 amChicago O'Hare Intl
$156
Find similar
Spirit Airlines
Oct 1
ORD11:15 amChicago O'Hare Intl
4h 01m
LAS1:16 pmLas Vegas Harry Reid Intl
Oct 3
LAS11:19 amLas Vegas Harry Reid Intl
3h 40m
ORD4:59 pmChicago O'Hare Intl
$158
Find similar
Spirit Airlines
Oct 3
ORD7:09 pmChicago O'Hare Intl
14h 31m
1 stop
LAS7:40 amLas Vegas Harry Reid Intl
Oct 11
LAS6:30 pmLas Vegas Harry Reid Intl
3h 47m
ORD12:17 amChicago O'Hare Intl
$161
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Arizona 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 September 25, 2025.
Use the filters below to find and compare flights from Illinois to Arizona that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sat 10/25

4:51 pm-6:30 pm

Nonstop3h 39m

Las Vegas Harry Reid Intl

Sat 11/1

10:30 am-3:56 pm

Nonstop3h 26m

$135

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sun 10/5

2:38 pm-4:16 pm

Nonstop3h 38m

Las Vegas Harry Reid Intl

Fri 10/10

6:20 am-11:43 am

Nonstop3h 23m

$136

ChicagoPhoenix

RFD - AZA

RFDAZA

Chicago Greater Rockford

Wed 11/5

8:04 pm-10:34 pm

Nonstop3h 30m

Phoenix-Mesa Gateway

Fri 11/7

1:45 pm-5:50 pm

Nonstop3h 05m

$150

ChicagoPhoenix

RFD - AZA

RFDAZA

Chicago Greater Rockford

Fri 10/31

9:25 pm-10:56 pm

Nonstop3h 31m

Phoenix-Mesa Gateway

Fri 11/7

1:45 pm-5:50 pm

Nonstop3h 05m

$151

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Sat 11/8

7:37 pm-9:49 pm

Nonstop4h 12m

Las Vegas Harry Reid Intl

Tue 11/11

11:59 pm-5:33 am

Nonstop3h 34m

$159

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Sun 10/26

9:50 pm-11:40 pm

Nonstop3h 50m

Las Vegas Harry Reid Intl

Wed 10/29

5:40 am-11:10 am

Nonstop3h 30m

$159

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Wed 10/22

7:10 am-9:05 am

Nonstop3h 55m

Las Vegas Harry Reid Intl

Wed 10/29

5:40 am-11:10 am

Nonstop3h 30m

$169

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Sat 10/25

4:15 pm-6:13 pm

Nonstop3h 58m

Las Vegas Harry Reid Intl

Mon 10/27

11:59 pm-5:33 am

Nonstop3h 34m

$183

ChicagoPhoenix

ORD - PHX

ORDPHX

Chicago O'Hare Intl

Wed 12/17

5:00 am-7:50 am

Nonstop3h 50m

Phoenix Sky Harbor Intl

Wed 12/24

7:00 am-11:32 am

Nonstop3h 32m

$189

ChicagoPhoenix

ORD - PHX

ORDPHX

Chicago O'Hare Intl

Wed 11/5

8:50 pm-11:52 pm

Nonstop4h 02m

Phoenix Sky Harbor Intl

Sat 11/8

5:00 am-9:27 am

Nonstop3h 27m

$190

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 Arizona from

How to get the cheapest flight ticket from Illinois to Arizona

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 Arizona?

The month of September is, on average, the cheapest month to fly to Arizona from Illinois, with most prices found around $227. If you aren’t able to travel to Arizona during the month of September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $229.

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

On average, the least expensive day to fly to Arizona from Illinois is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $304. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Arizona is Sunday, with ticket prices averaging around $404.

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

Our most recent data shows that the best time of day to fly to Arizona is in the afternoon. Flights from Illinois to Arizona during this time can be as low as $287. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $376 on average. Flights to Arizona from Illinois in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Illinois to Arizona flight route?

Fly from Chicago Greater Rockford to Phoenix-Mesa Gateway for the best Illinois - Arizona flight prices

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

You are more likely to see cheaper flights to Arizona from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Arizona for around $293 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Arizona from Illinois for as low as $255 on momondo.

What cabin class options are available on Illinois to Arizona flights?

There are 4 cabin classes available to choose from on Illinois to Arizona 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 Illinois to Arizona flights?

No. A direct flight is the cheapest option for a flight between Illinois to Arizona.

Cheap Illinois to Arizona flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Arizona

Best Price Found

$122

Fastest flight time

3h 20m

Direct flights

Every day

Airports in Arizona

2 airports
The best one-way flight to Arizona from Illinois in the past 72 hours is $122. The best round-trip flight deal from Illinois to Arizona found on momondo in the last 72 hours is $153.
The fastest flight from Illinois to Arizona takes 3h 20m
Direct flights go from Illinois to Arizona every day.
There are 2 airports near Arizona: Phoenix Sky Harbor Intl (PHX), Phoenix-Mesa Gateway (AZA)
Search flight deals

  • When did momondo last update prices for flights from Illinois to Arizona?

    Prices for flights from Illinois to Arizona were last updated today.

  • How many operators does momondo search for flights from Illinois to Arizona?

  • How old do you have to be to fly from Illinois to Arizona?

    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 Illinois to Arizona.

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

    The travel and health documents you'll need for your trip to Arizona may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Arizona. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Illinois to Arizona?

Best airlines flying from Illinois to Arizona

Compare and see reviews for airlines that fly from Illinois to Arizona with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $69Free CancellationRating
5.8
3,162 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $98Free CancellationRating
6.3
8,045 reviews
Search Spirit Airlines flights
Allegiant AirPriceFrom $114Free CancellationRating
7.2
699 reviews
Search Allegiant Air flights
Alaska AirlinesPriceFrom $154Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $180Free CancellationRating
7.4
8,928 reviews
Search United Airlines flights
American AirlinesPriceFrom $188Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $206Free CancellationRating
8.0
4,246 reviews
Search Southwest flights
DeltaPriceFrom $216Free CancellationRating
7.9
7,973 reviews
Search Delta flights

Why use momondo?

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

It is quick and easy to find Illinois to Arizona 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 Arizona that suits you.

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

Flights from Illinois to Arizona with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo provides multiple filters to help you find the best flight to Arizona from Illinois. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes momondo offers price alerts on flights to Arizona from Illinois. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Arizona trip

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