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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 7/11. Fares are subject to change and may not be available on all flights or dates of travel.
DTT — ORD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$70
(Kiwi.com)

One-way from

$28
(FlightHub)

Popular in

June

Cheapest in

October

Average price

$321

Good round-trip deal

$296 or less

Good one-way deal

$160 or less
From Detroit (DTT) to Illinois
Search Deals
One-way flight from Detroit (DTT) to Illinois
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Highest demand for flights based on searches. 27% potential increase in price ($80 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 6/10. 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 6/305:47 pmDTW - STL
Nonstop1h 31mSpirit Airlines
Thu 7/1010:47 amSTL - DTW
Nonstop1h 29mSpirit Airlines
Deal found 6/10$70
This Southwest deal was found by Cheapflights users on 6/10. 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.
Mon 9/87:30 pmDTW - MDW
Nonstop1h 10mSouthwest
Wed 9/102:55 pmMDW - DTW
1 stop6h 20mSouthwest
Deal found 6/10$107
This Southwest deal was found by Cheapflights users on 6/10. 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.
Mon 9/85:40 amDTW - ORD
1 stop8h 05mSouthwest
Wed 9/101:50 pmORD - DTW
1 stop7h 25mSouthwest
Deal found 6/10$122
This Delta deal was found by Cheapflights users on 6/10. 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 9/2712:15 pmDTW - ORD
Nonstop1h 24mDelta
Mon 9/297:00 amORD - DTW
Nonstop1h 27mDelta
Deal found 6/10$124
This Delta deal was found by Cheapflights users on 6/10. 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 9/2712:15 pmDTW - MDW
Nonstop1h 17mDelta
Mon 9/291:00 pmMDW - DTW
Nonstop1h 13mDelta
Deal found 6/10$124
This Mytrip deal was found by Cheapflights users on 6/10. 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.
Tue 7/810:04 pmDTW - ORD
1 stop10h 00mSpirit Airlines
Tue 7/156:02 pmORD - DTW
1 stop15h 39mSpirit Airlines
Deal found 6/10$136
This Delta deal was found by Cheapflights users on 6/10. 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.
Wed 8/138:55 amDTW - STL
Nonstop1h 37mDelta
Mon 8/186:40 amSTL - DTW
Nonstop1h 33mDelta
Deal found 6/10$139
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/96:00 amDTW - ORD
Nonstop1h 30mUnited Airlines
Mon 10/139:05 pmORD - DTW
Nonstop1h 36mUnited Airlines
Deal found 6/10$157
This Mytrip deal was found by Cheapflights users on 6/9. 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.
Sun 7/1311:28 amDTW - STL
1 stop9h 03mMultiple Airlines
Mon 7/2110:47 amSTL - DTW
Nonstop1h 29mMultiple Airlines
Deal found 6/9$158
This Southwest deal was found by Cheapflights users on 6/10. 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.
Tue 8/126:15 amDTW - STL
1 stop4h 20mSouthwest
Tue 8/195:25 pmSTL - DTW
Nonstop1h 30mSouthwest
Deal found 6/10$167
This American Airlines deal was found by Cheapflights users on 6/12. 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 8/57:15 amDTW - ORD
1 stop8h 00mAmerican Airlines
Wed 8/66:45 amORD - DTW
Nonstop1h 27mAmerican Airlines
Deal found 6/12$174
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Fri 8/83:12 pmDTW - STL
1 stop6h 06mAmerican Airlines
Mon 8/118:40 amSTL - DTW
1 stop5h 49mAmerican Airlines
Deal found 6/11$182

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 June 12, 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

Mon 6/30

5:47 pm-6:18 pm

Nonstop1h 31m

Lambert-St Louis

Thu 7/10

10:47 am-1:16 pm

Nonstop1h 29m

$70

DetroitChicago

DTW - MDW

DTWMDW

Detroit Metropolitan Wayne County

Mon 9/8

7:30 pm-7:40 pm

Nonstop1h 10m

Chicago Midway

Wed 9/10

2:55 pm-10:15 pm

1 stop6h 20m

$107

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Mon 9/8

5:40 am-12:45 pm

1 stop8h 05m

Chicago O'Hare Intl

Wed 9/10

1:50 pm-10:15 pm

1 stop7h 25m

$122

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Sat 8/30

8:00 pm-8:23 pm

Nonstop1h 23m

Chicago O'Hare Intl

Mon 9/1

11:05 am-1:24 pm

Nonstop1h 19m

$124

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Tue 7/8

10:04 pm-7:04 am

1 stop10h 00m

Chicago O'Hare Intl

Tue 7/15

6:02 pm-10:41 am

1 stop15h 39m

$136

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Wed 8/13

8:55 am-9:32 am

Nonstop1h 37m

Lambert-St Louis

Mon 8/18

6:40 am-9:13 am

Nonstop1h 33m

$139

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Mon 8/11

7:14 am-7:42 am

Nonstop1h 28m

Chicago O'Hare Intl

Fri 8/15

9:25 pm-11:57 pm

Nonstop1h 32m

$155

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Sun 7/13

11:28 am-7:31 pm

1 stop9h 03m

Lambert-St Louis

Mon 7/21

10:47 am-1:16 pm

Nonstop1h 29m

$158

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Tue 8/12

6:15 am-9:35 am

1 stop4h 20m

Lambert-St Louis

Tue 8/19

5:25 pm-7:55 pm

Nonstop1h 30m

$167

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Tue 8/5

7:15 am-2:15 pm

1 stop8h 00m

Chicago O'Hare Intl

Wed 8/6

6:45 am-9:12 am

Nonstop1h 27m

$174

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 57 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 June 12, 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 June 12, 2025.

The most flights from DTT to USIL are scheduled on a Thursday (91 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (32 on average).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 June 12, 2025.
Read through reviews of airlines operating flights from Detroit to Illinois, such as Southwest, Delta and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Boarding

8.2

Comfort

8.0

Food

7.1

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Boarding

8.2

Comfort

8.0

Food

7.1

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,950 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Boarding

8.2

Comfort

8.0

Food

7.1

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,790 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Boarding

8.2

Comfort

8.0

Food

7.1

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
JetBlue
7.3
Good
2,925 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Boarding

8.2

Comfort

8.0

Food

7.1

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Boarding

8.2

Comfort

8.0

Food

7.1

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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 $49 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: Copa Airlines (98%), ANA (92%), SWISS( 90%).

  • What are the cheapest flights from Detroit to Illinois?

    On average you can expect to pay $2,109 for a flight from Detroit to Illinois. The cheapest flight overall is $105 while the most popular route, (Detroit Metropolitan Wayne County - Chicago O'Hare Intl) is currently priced at $97.

  • 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.

See more FAQs

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$38Average$81FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$97Average$389FlexibilityNo cancel feeOn-time69%
DeltaCheapest$97Average$250FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$97Average$425FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$108Average$237FlexibilityNo cancel feeOn-time63%

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