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Mesa

$37+ Cheap flights from Illinois to Mesa, AZ

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 1/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PHX
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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Cheap flight deals from Illinois to Mesa

Keep the following information in mind while searching for Illinois to Mesa flight deals. Data was last updated November 6, 2025.

Round-trip from

$159
(Kiwi.com)

One-way from

$37
(Kiwi.com)

Popular in

March

Cheapest in

August

Average price

$303
From Illinois to Mesa
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One-way flight from Illinois to Mesa
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Highest demand for flights based on searches. 5% potential increase in price ($15 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Illinois to Mesa

Cheapest flights from Illinois to Mesa
Explore the most affordable flight options available from Illinois to Mesa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 6, 2025.

This Trip.com deal was found by Cheapflights users on 11/4. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/154:51 pmSTL - PHX
1 stop7h 38mFrontier
Fri 11/2111:14 amPHX - STL
Nonstop2h 54mFrontier
Deal found 11/4$159
This CheapOair deal was found by Cheapflights users on 11/5. 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.
Mon 11/179:07 pmSTL - PHX
1 stop26h 17mFrontier
Fri 11/2111:14 amPHX - STL
Nonstop2h 54mFrontier
Deal found 11/5$160
This Kiwi.com deal was found by Cheapflights users on 11/5. 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.
Sat 12/207:43 pmSTL - PHX
1 stop6h 01mFrontier
Tue 12/2310:26 pmPHX - STL
1 stop16h 58mFrontier
Deal found 11/5$162
This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
Thu 12/255:19 pmSTL - PHX
1 stop16h 29mFrontier
Mon 12/294:10 pmPHX - STL
Nonstop2h 57mFrontier
Deal found 11/6$163
This CheapOair deal was found by Cheapflights users on 11/6. 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.
Sun 12/147:24 pmMDW - PHX
Nonstop4h 05mFrontier
Wed 12/1712:59 amPHX - MDW
1 stop19h 59mFrontier
Deal found 11/6$164
This Kiwi.com deal was found by Cheapflights users on 11/5. 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 12/1210:05 pmORD - PHX
Nonstop3h 54mMultiple Airlines
Sat 12/2012:59 amPHX - ORD
1 stop16h 51mMultiple Airlines
Deal found 11/5$164
This Kiwi.com deal was found by Cheapflights users on 11/5. 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 12/810:47 amSTL - PHX
2 stops14h 34mFrontier
Fri 12/127:25 amPHX - STL
Nonstop2h 57mFrontier
Deal found 11/5$164
This Kiwi.com deal was found by Cheapflights users on 11/5. 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 12/32:49 pmMDW - PHX
2 stops32h 29mFrontier
Mon 12/810:29 amPHX - MDW
Nonstop3h 23mFrontier
Deal found 11/5$165
This American Airlines deal was found by Cheapflights users on 11/4. 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 12/175:00 amORD - PHX
Nonstop3h 50mAmerican Airlines
Sun 1/412:58 amPHX - ORD
Nonstop3h 36mAmerican Airlines
Deal found 11/4$165
This CheapOair deal was found by Cheapflights users on 11/6. 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.
Fri 12/512:07 pmSTL - PHX
Nonstop3h 31mFrontier
Sat 12/67:43 pmPHX - STL
1 stop15h 29mFrontier
Deal found 11/6$165
This CheapOair deal was found by Cheapflights users on 11/4. 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.
Mon 11/178:30 amMDW - PHX
Nonstop3h 53mFrontier
Mon 11/244:58 pmPHX - MDW
1 stop28h 19mFrontier
Deal found 11/4$166
This Frontier deal was found by Cheapflights users on 11/3. 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.
Mon 11/173:30 pmORD - PHX
Nonstop4h 04mFrontier
Fri 11/212:50 pmPHX - ORD
1 stop8h 18mFrontier
Deal found 11/3$166

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Mesa 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 November 6, 2025.
Use the filters below to find and compare flights from Illinois to Mesa that are best for you.

Fly from

Illinois

Fly to

Mesa

Route

Depart

Return

Price

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Mon 1/12

8:45 am-11:36 pm

2 stops15h 51m

Phoenix Sky Harbor Intl

Tue 1/20

5:12 pm-10:02 am

1 stop15h 50m

$170

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Mon 2/2

7:43 pm-4:04 pm

1 stop21h 21m

Phoenix Sky Harbor Intl

Sat 2/7

6:54 pm-9:47 am

2 stops13h 53m

$174

ChicagoPhoenix

ORD - PHX

ORDPHX

Chicago O'Hare Intl

Thu 1/1

8:39 am-3:51 pm

1 stop8h 12m

Phoenix Sky Harbor Intl

Mon 1/5

8:36 pm-2:37 pm

1 stop17h 01m

$185

ChicagoPhoenix

ORD - PHX

ORDPHX

Chicago O'Hare Intl

Mon 1/5

8:39 am-3:59 pm

1 stop8h 20m

Phoenix Sky Harbor Intl

Fri 1/9

11:41 am-11:37 pm

1 stop10h 56m

$185

St. LouisPhoenix

STL - PHX

STLPHX

Lambert-St Louis

Mon 1/12

8:45 am-11:36 pm

2 stops15h 51m

Phoenix Sky Harbor Intl

Sun 1/18

10:31 pm-10:04 am

1 stop10h 33m

$188

ChicagoPhoenix

MDW - PHX

MDWPHX

Chicago Midway

Thu 1/8

5:05 am-8:15 am

Nonstop4h 10m

Phoenix Sky Harbor Intl

Mon 1/12

6:35 pm-10:50 pm

Nonstop3h 15m

$201

ChicagoPhoenix

ORD - PHX

ORDPHX

Chicago O'Hare Intl

Sat 12/6

8:00 am-5:49 pm

1 stop10h 49m

Phoenix Sky Harbor Intl

Wed 12/10

6:02 am-2:09 pm

1 stop7h 07m

$201

ChicagoPhoenix

MDW - PHX

MDWPHX

Chicago Midway

Tue 1/6

8:15 am-2:25 pm

2 stops7h 10m

Phoenix Sky Harbor Intl

Sat 1/10

10:20 pm-5:05 am

1 stop5h 45m

$204

ChicagoPhoenix

ORD - PHX

ORDPHX

Chicago O'Hare Intl

Wed 12/3

3:05 pm-11:59 pm

1 stop9h 54m

Phoenix Sky Harbor Intl

Tue 12/9

10:22 am-7:54 pm

1 stop8h 32m

$205

ChicagoPhoenix

ORD - PHX

ORDPHX

Chicago O'Hare Intl

Wed 12/10

3:05 pm-11:59 pm

1 stop9h 54m

Phoenix Sky Harbor Intl

Tue 12/16

6:02 am-2:09 pm

1 stop7h 07m

$205

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Mesa

Have a flexible travel schedule? Discover the best time to fly to Mesa from Illinois 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 Illinois to Mesa

What is the cheapest month to book a flight from Illinois to Mesa?

Currently, April is the cheapest month in which you can book a flight from Illinois to Mesa (average of $59). Flying from Illinois to Mesa in March is currently the most expensive (average of $137). 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 IL to MS9?

Find hourly flight availability from Illinois to Mesa. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 6, 2025.

One of the essential ways to save on airfare from Illinois to Mesa is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 34% on airfare.

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

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

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

Weekly flight availability from Illinois to Mesa

Explore weekly flight availability from Illinois to Mesa. 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 November 6, 2025.

The most flights from USIL to MS9 are scheduled on a Thursday (43 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (26 on average).

Related info for your journey

Find useful and relevant information for your journey from Illinois to Mesa. 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 Illinois to Mesa?

    There are many flights that can get you from Illinois to Mesa in 4h 10m. Fly via Frontier, Alaska Airlines, or Southwest to get the fastest option. The distance from Illinois to Mesa is about 1440 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Illinois to Mesa one-way?

    For one-way options, check prices for Southwest. According to our data, you can fly for as low as $70. Users have also found prices from $79 and $98 on Frontier and Alaska Airlines, respectively.

  • What are the most popular routes from Illinois to Mesa?

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

  • What are the most reliable airlines from Illinois to Mesa?

    Before booking your flight to Mesa from Illinois, check out the most reliable airlines to get you to your destination on time: United Airlines (85%), Air Canada (80%), Cathay Pacific( 80%).

  • What are the cheapest flights from Illinois to Mesa?

    On average you can expect to pay $743 for a flight from Illinois to Mesa. The cheapest flight overall is $55 while the most popular route, (Chicago O'Hare Intl - Phoenix Sky Harbor Intl) is currently priced at $85.

  • Can I find deals for flights from Illinois to Mesa that include hotel bookings?

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

  • How can I find direct flights from Illinois to Mesa?

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

  • Can I find deals for business class flights from Illinois to Mesa?

    Yes. Cheapflights offers flight deals from Illinois to Mesa 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 Illinois to Mesa?

    Currently, April is the cheapest month in which you can book a flight from Illinois to Mesa (average of $59). Flying from Illinois to Mesa in March is currently the most expensive (average of $137). 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 Illinois to Mesa

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Top 8 airlines flying from Illinois to Mesa

Discover the top 8 airlines that operate flights from Illinois to Mesa. 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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$69Average$205FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$98Average$221FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$116Average$265FlexibilityNo cancel feeOn-time88%
Alaska AirlinesCheapest$154Average$231FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$183Average$389FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$191Average$451FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$206Average$363FlexibilityNo cancel feeOn-time63%
DeltaCheapest$236Average$341FlexibilityNo cancel feeOn-timeN/A

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