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$72+ Cheap flights from Tucson (TUS) 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 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
TUS — ORD
Oct 29 — Nov 51
Wed 10/29
Wed 11/5
1 adult, Economy
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Cheap flight deals from Tucson to Illinois

Keep the following information in mind while searching for Tucson to Illinois flight deals. Data was last updated September 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$156
(Booking.com)

One-way from

$72
(Priceline)

Popular in

February

Cheapest in

August

Average price

$424

Good round-trip deal

$351 or less

Good one-way deal

$240 or less
Provider with most accurate pricing for Tucson-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Tucson-Chicago (CHI) flights.
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From Tucson to Illinois
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One-way flight from Tucson to Illinois
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High demand for flights, 2% potential price rise
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Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Tucson to Illinois.
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Price to beat on a one-way flight from Tucson to Illinois.
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Find flight deals from Tucson to Illinois

Cheapest flights from Tucson to Illinois
Explore the most affordable flight options available from Tucson to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 29, 2025.

This Priceline deal was found by Cheapflights users on 9/29. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/308:21 amTUS - STL
1 stop7h 06mFrontier
Sun 11/212:20 pmSTL - TUS
1 stop5h 30mFrontier
Deal found 9/29$144
This Frontier deal was found by Cheapflights users on 9/29. 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.
Fri 10/2412:24 pmTUS - ORD
1 stop6h 30mFrontier
Sun 10/266:50 amORD - TUS
1 stop6h 07mFrontier
Deal found 9/29$155
This Booking.com deal was found by Cheapflights users on 9/28. 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.
Sun 10/2611:42 amTUS - STL
1 stop19h 25mFrontier
Sun 11/212:20 pmSTL - TUS
1 stop5h 30mFrontier
Deal found 9/28$156
This Booking.com deal was found by Cheapflights users on 9/29. 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.
Fri 10/1712:24 pmTUS - ORD
1 stop6h 30mFrontier
Sun 10/199:54 pmORD - TUS
1 stop15h 45mFrontier
Deal found 9/29$201
This Frontier deal was found by Cheapflights users on 9/29. 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.
Thu 10/911:42 amTUS - ORD
1 stop10h 11mFrontier
Sun 10/126:50 amORD - TUS
1 stop6h 07mFrontier
Deal found 9/29$254
This Delta deal was found by Cheapflights users on 9/29. 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.
Tue 11/412:15 pmTUS - STL
1 stop5h 30mDelta
Sat 11/83:59 pmSTL - TUS
1 stop8h 31mDelta
Deal found 9/29$275
This Kiwi.com deal was found by Cheapflights users on 9/27. 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.
Sun 11/92:20 pmTUS - ORD
2 stops31h 40mFrontier
Sun 11/1610:43 pmORD - TUS
1 stop15h 52mFrontier
Deal found 9/27$281
This Orbitz deal was found by Cheapflights users on 9/29. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/308:21 amTUS - STL
1 stop7h 06mMultiple Airlines
Mon 11/34:14 pmSTL - TUS
1 stop8h 40mMultiple Airlines
Deal found 9/29$285
This American Airlines deal was found by Cheapflights users on 9/26. 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 10/2512:58 pmTUS - STL
1 stop7h 08mAmerican Airlines
Sat 11/15:20 amSTL - TUS
1 stop5h 34mAmerican Airlines
Deal found 9/26$287
This American Airlines deal was found by Cheapflights users on 9/29. 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 11/41:45 pmTUS - ORD
Nonstop3h 36mAmerican Airlines
Sat 11/89:50 amORD - TUS
Nonstop4h 02mAmerican Airlines
Deal found 9/29$291
This American Airlines deal was found by Cheapflights users on 9/28. 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 11/42:38 pmTUS - STL
2 stops7h 20mAmerican Airlines
Sat 11/83:59 pmSTL - TUS
1 stop6h 18mAmerican Airlines
Deal found 9/28$292
This American Airlines deal was found by Cheapflights users on 9/28. 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 11/121:45 pmTUS - ORD
Nonstop3h 36mAmerican Airlines
Wed 11/199:50 amORD - TUS
Nonstop4h 02mAmerican Airlines
Deal found 9/28$292

Cheapflights Fare Finder

 
Customize your flight search to find flights from Tucson 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 September 29, 2025.
Use the filters below to find and compare flights from Tucson to Illinois that are best for you.

Fly from

Tucson

Fly to

Illinois

Route

Depart

Return

Price

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Wed 11/5

7:00 am-2:43 pm

1 stop6h 43m

Lambert-St Louis

Sat 11/8

5:15 pm-11:30 pm

1 stop7h 15m

$275

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Tue 11/4

7:00 am-4:10 pm

1 stop8h 10m

Lambert-St Louis

Sat 11/8

5:30 pm-10:25 pm

1 stop5h 55m

$275

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Sat 10/25

12:58 pm-10:06 pm

1 stop7h 08m

Lambert-St Louis

Sat 11/1

5:20 am-8:54 am

1 stop5h 34m

$287

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Wed 1/28

1:40 pm-11:40 pm

1 stop9h 00m

Lambert-St Louis

Wed 2/4

6:00 am-12:24 pm

1 stop7h 24m

$287

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Sat 10/25

7:15 am-4:54 pm

1 stop7h 39m

Lambert-St Louis

Sat 11/1

1:35 pm-8:59 pm

2 stops9h 24m

$292

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Wed 1/28

8:00 am-4:14 pm

2 stops7h 14m

Lambert-St Louis

Wed 2/4

11:55 am-6:13 pm

1 stop7h 18m

$292

TucsonSt. Louis

TUS - STL

TUSSTL

Tucson

Tue 11/4

2:38 pm-10:58 pm

2 stops7h 20m

Lambert-St Louis

Sat 11/8

3:59 pm-9:17 pm

1 stop6h 18m

$292

TucsonChicago

TUS - ORD

TUSORD

Tucson

Tue 10/21

11:35 am-5:05 pm

Nonstop3h 30m

Chicago O'Hare Intl

Tue 10/28

9:07 am-11:30 am

Nonstop4h 23m

$311

TucsonChicago

TUS - MDW

TUSMDW

Tucson

Wed 11/12

1:50 pm-11:40 pm

1 stop8h 50m

Chicago Midway

Wed 11/19

5:34 pm-11:59 pm

1 stop7h 25m

$311

TucsonChicago

TUS - ORD

TUSORD

Tucson

Tue 11/4

12:15 pm-9:43 pm

1 stop8h 28m

Chicago O'Hare Intl

Wed 11/5

1:25 pm-11:30 pm

2 stops11h 05m

$316

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/28

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

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

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

Currently, August is the cheapest month in which you can book a flight from Tucson to Illinois (average of $245). Flying from Tucson 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 TUS to IL?

Find hourly flight availability from Tucson 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 September 29, 2025.

When flying from Tucson 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 Tucson to Illinois

Explore weekly flight availability from Tucson 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 September 29, 2025.

The most flights from TUS to USIL are scheduled on a Monday (7 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (5 on average).

How much does it cost to fly round-trip from Tucson to Illinois?

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 September 29, 2025.
Read through reviews of airlines operating flights from Tucson to Illinois, such as Southwest, United Airlines, and American Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,924 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,157 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Tucson to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Tucson to Illinois?

    For a flight from Tucson to Illinois, you will be flying from Tucson. Tucson (TUS) is just 7.5 mi from the center of the city.

  • How long is the flight from Tucson to Illinois?

    Delta, United Airlines, and American Airlines can get you from Tucson to Illinois in just under 3h 30m. Your travel time can differ by up to 3h 26m. The distance from Tucson to Illinois is about 1434 mi. This flight may include one or multiple stops.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $72. Users have also found prices from $146 and $146 on Southwest and United Airlines, respectively.

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

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

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

    Before booking your flight to Illinois from Tucson, check out the most reliable airlines to get you to your destination on time: SkyWest Airlines (72%), Emirates (72%), United Airlines( 72%).

  • What are the cheapest flights from Tucson to Illinois?

    The cheapest flight price from Tucson to Illinois is $159. On average you can expect to pay $1,050. The most popular route, (Tucson - Chicago O'Hare Intl), can usually be booked for $244.

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

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

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

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

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

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

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

See more FAQs

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See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Tucson to Illinois

Discover the top 4 airlines that operate flights from Tucson 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 September 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$110Average$216FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$237Average$478FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$256Average$466FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$300Average$471FlexibilityNo cancel feeOn-time63%

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