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$28+ Cheap flights from Detroit (DTT) 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 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
DTT — ORD
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheap flight deals from Detroit to Illinois

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

Round-trip from

$60
(Booking.com)

One-way from

$28
(FlightHub)

Popular in

December

Cheapest in

October

Average price

$275

Good round-trip deal

$240 or less

Good one-way deal

$176 or less
From Detroit (DTT) to Illinois
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One-way flight from Detroit (DTT) to Illinois
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Highest demand for flights based on searches. 17% potential increase in price ($44 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Detroit (DTT) to Illinois.
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Price to beat on a one-way flight from Detroit (DTT) to Illinois.
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Find flight deals from Detroit to Illinois

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

This Booking.com deal was found by Cheapflights users on 7/29. 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 8/291:00 pmDTW - STL
Nonstop1h 32mSpirit Airlines
Sun 8/312:30 pmSTL - DTW
Nonstop1h 30mSpirit Airlines
Deal found 7/29$60
This Southwest deal was found by Cheapflights users on 7/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/277:10 amDTW - MDW
Nonstop1h 10mSouthwest
Wed 8/272:55 pmMDW - DTW
1 stop6h 20mSouthwest
Deal found 7/29$101
This Delta deal was found by Cheapflights users on 7/29. 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.
Thu 8/288:55 amDTW - STL
Nonstop1h 37mDelta
Thu 8/286:00 pmSTL - DTW
Nonstop1h 30mDelta
Deal found 7/29$119
This Delta deal was found by Cheapflights users on 7/29. 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.
Sat 8/238:00 pmDTW - ORD
Nonstop1h 23mDelta
Sun 8/249:10 amORD - DTW
Nonstop1h 20mDelta
Deal found 7/29$121
This SmartFares deal was found by Cheapflights users on 7/27. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/112:53 pmDTW - ORD
1 stop8h 05mSpirit Airlines
Thu 9/1811:13 amORD - DTW
1 stop6h 42mSpirit Airlines
Deal found 7/27$140
This Southwest deal was found by Cheapflights users on 7/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/35:50 amDTW - ORD
1 stop7h 00mSouthwest
Tue 9/161:50 pmORD - DTW
1 stop7h 25mSouthwest
Deal found 7/28$141
This Trip.com deal was found by Cheapflights users on 7/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/281:00 pmDTW - STL
Nonstop1h 32mMultiple Airlines
Sun 8/3110:17 amSTL - DTW
1 stop6h 43mMultiple Airlines
Deal found 7/28$142
This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1612:15 pmDTW - MDW
Nonstop1h 13mDelta
Sat 9/209:35 amMDW - DTW
Nonstop1h 10mDelta
Deal found 7/28$144
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Thu 9/117:00 amDTW - ORD
Nonstop1h 42mAmerican Airlines
Thu 9/184:22 pmORD - DTW
Nonstop1h 26mAmerican Airlines
Deal found 7/28$150
This Southwest deal was found by Cheapflights users on 7/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2812:30 pmDTW - STL
1 stop4h 15mSouthwest
Sun 8/319:55 amSTL - DTW
Nonstop1h 30mSouthwest
Deal found 7/29$167
This Mytrip deal was found by Cheapflights users on 7/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/59:46 amDTW - RFD
1 stop5h 39mMultiple Airlines
Mon 9/810:37 amRFD - DTW
1 stop7h 14mMultiple Airlines
Deal found 7/27$168
This American Airlines deal was found by Cheapflights users on 7/26. 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.
Tue 10/281:07 pmDTW - STL
1 stop8h 19mAmerican Airlines
Wed 10/297:16 amSTL - DTW
1 stop11h 03mAmerican Airlines
Deal found 7/26$171

Cheapflights Fare Finder

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

Fly from

Detroit

Fly to

Illinois

Route

Depart

Return

Price

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Fri 8/29

1:00 pm-1:32 pm

Nonstop1h 32m

Lambert-St Louis

Sun 8/31

2:30 pm-5:00 pm

Nonstop1h 30m

$60

DetroitChicago

DTW - MDW

DTWMDW

Detroit Metropolitan Wayne County

Wed 9/10

2:30 pm-2:40 pm

Nonstop1h 10m

Chicago Midway

Wed 9/10

4:30 pm-9:25 pm

1 stop3h 55m

$101

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Thu 8/28

8:55 am-9:32 am

Nonstop1h 37m

Lambert-St Louis

Thu 8/28

6:00 pm-8:30 pm

Nonstop1h 30m

$119

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Sat 8/23

3:50 pm-4:13 pm

Nonstop1h 23m

Chicago O'Hare Intl

Sun 8/24

7:15 am-9:30 am

Nonstop1h 15m

$121

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Thu 9/11

2:53 pm-9:58 pm

1 stop8h 05m

Chicago O'Hare Intl

Thu 9/18

11:13 am-6:55 pm

1 stop6h 42m

$140

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Wed 9/3

5:50 am-11:50 am

1 stop7h 00m

Chicago O'Hare Intl

Tue 9/16

1:50 pm-10:15 pm

1 stop7h 25m

$141

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Thu 8/28

1:00 pm-1:32 pm

Nonstop1h 32m

Lambert-St Louis

Sun 8/31

10:17 am-6:00 pm

1 stop6h 43m

$142

DetroitChicago

DTW - MDW

DTWMDW

Detroit Metropolitan Wayne County

Tue 9/16

12:15 pm-12:28 pm

Nonstop1h 13m

Chicago Midway

Sat 9/20

9:35 am-11:45 am

Nonstop1h 10m

$144

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Thu 8/28

12:30 pm-3:45 pm

1 stop4h 15m

Lambert-St Louis

Sun 8/31

9:55 am-12:25 pm

Nonstop1h 30m

$167

DetroitChicago

DTW - RFD

DTWRFD

Detroit Metropolitan Wayne County

Fri 9/5

9:46 am-2:25 pm

1 stop5h 39m

Chicago Greater Rockford

Mon 9/8

10:37 am-6:51 pm

1 stop7h 14m

$168

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 48 results
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Best time to book a flight from Detroit to Illinois

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

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

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

Find hourly flight availability from Detroit 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 July 29, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Detroit to Illinois as you normally would.

Weekly flight availability from Detroit to Illinois

Explore weekly flight availability from Detroit 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 July 29, 2025.

The most flights from DTT to USIL are scheduled on a Tuesday (88 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (36 on average).

How much does it cost to fly round-trip from Detroit 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 July 29, 2025.
Read through reviews of airlines operating flights from Detroit to Illinois, such as Southwest, Delta, and United 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
4,238 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,977 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,899 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Spirit Airlines
6.3
Okay
8,040 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

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

    Detroit All airports (DTT), located 0.6 mi from the city center, is the airport you fly out of when you book flights from Detroit to Illinois.

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

    To fly one-way, consider booking your trip with Spirit Airlines, which is currently one of the cheapest options available, starting at $28. Delta flights start at $49 while deals on Southwest start at $56 one-way.

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

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

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

    Before booking your flight to Illinois from Detroit, check out the most reliable airlines to get you to your destination on time: GoJet (98%), SWISS (90%), Copa Airlines( 88%).

  • What are the cheapest flights from Detroit to Illinois?

    On average you can expect to pay $1,559 for a flight from Detroit to Illinois. The cheapest flight overall is $81 while the most popular route, (Detroit Metropolitan Wayne County - Chicago O'Hare Intl) is currently priced at $91.

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

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

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

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

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

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

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

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Detroit to Illinois

Discover the top 5 airlines that operate flights from Detroit 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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$38Average$93FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$88Average$392FlexibilityNo cancel feeOn-time69%
DeltaCheapest$95Average$252FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$97Average$414FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$127Average$250FlexibilityNo cancel feeOn-time63%

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