How long is the flight from Detroit to Illinois?

Airlines like United Airlines, Delta, and American Airlines fly from Detroit to Illinois in about 1h 23m. The time it takes to get you to your destination can typically vary by up to 5h 06m. Airlines will cover a distance of 227 mi. This flight may include one or multiple stops.

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

To fly one-way, consider booking your trip with Southwest, which is currently one of the cheapest options available, starting at $38. Delta flights start at $46 while deals on American Airlines start at $48 one-way.

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.

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).

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 cheapest flights from Detroit to Illinois?

On average you can expect to pay $871 for a flight from Detroit to Illinois. The cheapest flight overall is $119 while the most popular route, (Detroit Metropolitan Wayne County - Chicago O'Hare Intl) is currently priced at $136.

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: Air France (90%), Royal Jordanian (84%), Envoy Air( 84%).

What are the most popular airlines that fly from Detroit to Illinois?

When booking a flight from Detroit to Illinois, you may want to consider flying on Delta, United Airlines or American Airlines as they are the most popular for this route.

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.

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.

$64+ Flights from Detroit to Illinois

Q: How much does it cost to fly round-trip from Detroit to Illinois?

Airfare is below average for this route at the moment. Detroit to Illinois flights typically cost between $469 and $707 in January. The cheapest round-trip price found within the last 3 days was $137 on Multiple Airlines (Jan 12-Feb 11).

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Cheap 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 December 16, 2025.

Thu 12/251:56 pmDTW - ORD

Nonstop1h 43mUnited Airlines

Thu 12/257:55 pmORD - DTW

Nonstop1h 35mUnited Airlines

Deal found 12/16

$175

Thu 12/258:25 amDTW - MDW

Nonstop1h 24mDelta

Thu 12/256:08 pmMDW - DTW

Nonstop1h 20mDelta

Deal found 12/16

$175

Thu 12/2512:15 pmDTW - ORD

1 stop23h 45mFrontier

Tue 12/305:35 amORD - DTW

1 stop26h 37mFrontier

Deal found 12/13

$187

Thu 12/2512:15 pmDTW - ORD

1 stop23h 45mFrontier

Thu 1/15:25 amORD - DTW

1 stop4h 55mFrontier

Deal found 12/13

$188

Thu 12/256:10 amDTW - MDW

Nonstop1h 30mSouthwest

Thu 1/111:25 amMDW - DTW

1 stop8h 15mSouthwest

Deal found 12/13

$191

Wed 12/2412:20 pmDTW - ORD

1 stop12h 52mFrontier

Thu 1/15:25 amORD - DTW

1 stop4h 55mFrontier

Deal found 12/16

$214

Wed 12/243:32 pmDTW - ORD

1 stop4h 50mAmerican Airlines

Thu 1/19:42 amORD - DTW

Nonstop1h 30mAmerican Airlines

Deal found 12/16

$215

Wed 12/246:00 pmDTW - ORD

Nonstop1h 41mUnited Airlines

Thu 1/17:55 pmORD - DTW

Nonstop1h 35mUnited Airlines

Deal found 12/16

$235

Wed 12/247:00 pmDTW - MDW

Nonstop1h 10mSouthwest

Wed 12/318:30 pmMDW - DTW

Nonstop1h 10mSouthwest

Deal found 12/15

$235

Wed 12/317:00 amDTW - MDW

Nonstop1h 25mSouthwest

Thu 1/111:25 amMDW - DTW

1 stop8h 15mSouthwest

Deal found 12/15

$242

Thu 12/256:00 amDTW - ORD

Nonstop1h 25mAmerican Airlines

Thu 12/2510:29 amORD - DTW

1 stop5h 00mAmerican Airlines

Deal found 12/16

$245

Thu 12/257:15 amDTW - ORD

Nonstop1h 43mUnited Airlines

Sat 1/36:10 pmORD - DTW

Nonstop1h 48mUnited Airlines

Deal found 12/13

$248

Best flights from Detroit to Illinois
Discover carefully curated flight deals from Detroit to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 16, 2025.

Tue 1/137:15 amDTW - ORD

Nonstop1h 43mUnited Airlines

Tue 1/202:23 pmORD - DTW

Nonstop1h 40mUnited Airlines

Deal found 12/16

$153

Tue 1/1312:25 pmDTW - MDW

Nonstop1h 23mDelta

Tue 1/206:35 pmMDW - DTW

Nonstop1h 10mDelta

Deal found 12/16

$153

Sat 1/175:15 amDTW - STL

1 stop18h 19mMultiple Airlines

Wed 1/218:22 pmSTL - DTW

2 stops15h 49mMultiple Airlines

Deal found 12/16

$194

Sat 1/178:50 amDTW - STL

Nonstop1h 55mSouthwest

Wed 1/215:55 pmSTL - DTW

Nonstop1h 30mSouthwest

Deal found 12/16

$222

Fri 1/911:30 amDTW - PIA

1 stop6h 29mAmerican Airlines

Fri 1/166:00 amPIA - DTW

1 stop7h 01mAmerican Airlines

Deal found 12/14

$249

Mon 1/124:59 pmDTW - ORD

Nonstop1h 27mDelta

Wed 2/116:00 pmORD - DTW

Nonstop1h 28mDelta

Deal found 12/14

$171

Thu 1/159:00 amDTW - ORD

Nonstop1h 31mUnited Airlines

Thu 2/52:23 pmORD - DTW

Nonstop1h 40mUnited Airlines

Deal found 12/14

$171

Mon 1/124:59 pmDTW - ORD

Nonstop1h 27mDelta

Mon 1/1910:35 amORD - DTW

Nonstop1h 21mDelta

Deal found 12/15

$171

Mon 1/1211:05 amDTW - ORD

Nonstop1h 43mUnited Airlines

Wed 1/147:35 pmORD - DTW

Nonstop1h 35mUnited Airlines

Deal found 12/13

$171

Tue 1/612:40 pmDTW - ORD

Nonstop1h 28mDelta

Wed 1/711:05 amORD - DTW

Nonstop1h 22mDelta

Deal found 12/14

$171

Wed 3/49:35 amDTW - STL

1 stop7h 18mMultiple Airlines

Sun 3/84:51 pmSTL - DTW

2 stops37h 50mMultiple Airlines

Deal found 12/15

$211

Thu 1/298:38 pmDTW - ORD

Nonstop1h 27mDelta

Tue 2/310:35 amORD - DTW

Nonstop1h 21mDelta

Deal found 12/14

$171

Thu 1/226:00 amDTW - STL

1 stop5h 41mUnited Airlines

Mon 1/263:11 pmSTL - DTW

1 stop4h 15mUnited Airlines

Deal found 12/14

$191

Tue 1/135:50 amDTW - STL

Nonstop2h 00mSouthwest

Sat 1/175:45 pmSTL - DTW

Nonstop1h 30mSouthwest

Deal found 12/13

$237

Fri 1/95:05 amDTW - STL

1 stop10h 43mMultiple Airlines

Sun 1/115:11 pmSTL - DTW

2 stops16h 09mMultiple Airlines

Deal found 12/15

$218

Sat 1/1712:40 pmDTW - ORD

Nonstop1h 28mDelta

Sat 1/246:50 amORD - DTW

Nonstop1h 32mDelta

Deal found 12/14

$171

Mon 1/126:35 amDTW - BMI

1 stop13h 33mMultiple Airlines

Mon 1/197:58 pmBMI - DTW

1 stop16h 08mMultiple Airlines

Deal found 12/13

$219

Wed 1/74:05 pmDTW - STL

1 stop6h 50mSouthwest

Sat 1/315:45 pmSTL - DTW

Nonstop1h 30mSouthwest

Deal found 12/14

$247

Thu 1/812:40 pmDTW - ORD

Nonstop1h 28mDelta

Mon 1/126:15 pmORD - DTW

Nonstop1h 28mDelta

Deal found 12/16

$171

Thu 1/294:10 pmDTW - ORD

Nonstop1h 28mDelta

Sat 1/311:55 pmORD - DTW

Nonstop1h 18mDelta

Deal found 12/15

$171

Wed 1/1411:05 amDTW - MLI

1 stop5h 04mUnited Airlines

Wed 1/213:45 pmMLI - DTW

1 stop5h 25mUnited Airlines

Deal found 12/15

$249

Mon 1/125:09 pmDTW - MDW

Nonstop1h 25mDelta

Wed 1/149:32 amMDW - DTW

Nonstop1h 11mDelta

Deal found 12/13

$171

Tue 12/306:39 pmDTW - MLI

1 stop6h 01mAmerican Airlines

Sat 1/35:43 pmMLI - DTW

1 stop6h 01mAmerican Airlines

Deal found 12/15

$353

Tue 1/135:09 pmDTW - MDW

Nonstop1h 25mDelta

Thu 1/229:32 amMDW - DTW

Nonstop1h 11mDelta

Deal found 12/14

$171

Thu 1/85:30 amDTW - STL

1 stop6h 32mUnited Airlines

Mon 1/123:11 pmSTL - DTW

1 stop4h 15mUnited Airlines

Deal found 12/14

$251

Thu 1/2912:25 pmDTW - MDW

Nonstop1h 21mDelta

Thu 2/59:33 amMDW - DTW

Nonstop1h 11mDelta

Deal found 12/15

$171

Wed 12/3112:48 pmDTW - EVV

1 stop4h 33mAmerican Airlines

Sun 1/44:51 pmEVV - DTW

1 stop6h 04mAmerican Airlines

Deal found 12/16

$392

Wed 1/75:09 pmDTW - MDW

Nonstop1h 25mDelta

Wed 1/141:28 pmMDW - DTW

Nonstop1h 10mDelta

Deal found 12/14

$171

Thu 1/1512:25 pmDTW - MDW

Nonstop1h 23mDelta

Thu 2/51:26 pmMDW - DTW

Nonstop1h 07mDelta

Deal found 12/14

$171

Tue 12/306:00 amDTW - EVV

1 stop5h 41mAmerican Airlines

Sat 1/311:07 amEVV - DTW

1 stop7h 01mAmerican Airlines

Deal found 12/15

$407

Last-minute flights from Detroit to Illinois
Discover last-minute flight deals from Detroit to Illinois. Data last updated December 16, 2025 and is based on user searches.

Fri 1/910:07 pmDTW - ORD

1 stop12h 05mSpirit Airlines

Sat 1/104:38 pmORD - DTW

1 stop6h 41mSpirit Airlines

Deal found 12/15

$155

Mon 1/127:07 pmDTW - ORD

1 stop14h 11mMultiple Airlines

Wed 2/118:10 amORD - DTW

1 stop9h 06mMultiple Airlines

Deal found 12/14

$137

Mon 1/127:07 pmDTW - ORD

1 stop14h 11mMultiple Airlines

Mon 1/1912:44 pmORD - DTW

1 stop21h 10mMultiple Airlines

Deal found 12/14

$148

Mon 1/125:15 pmDTW - STL

1 stop30h 19mMultiple Airlines

Mon 1/195:11 pmSTL - DTW

1 stop16h 43mMultiple Airlines

Deal found 12/15

$156

Mon 1/1211:28 amDTW - ORD

1 stop9h 13mMultiple Airlines

Sat 1/174:38 pmORD - DTW

1 stop6h 41mMultiple Airlines

Deal found 12/14

$156

Tue 1/1310:07 pmDTW - ORD

1 stop21h 17mMultiple Airlines

Tue 1/202:53 pmORD - DTW

1 stop6h 15mMultiple Airlines

Deal found 12/16

$145

Tue 1/137:15 amDTW - ORD

Nonstop1h 43mUnited Airlines

Tue 1/209:09 pmORD - DTW

Nonstop1h 35mUnited Airlines

Deal found 12/16

$153

Tue 1/1312:25 pmDTW - MDW

Nonstop1h 23mDelta

Tue 1/206:35 pmMDW - DTW

Nonstop1h 10mDelta

Deal found 12/16

$153

Tue 1/132:36 pmDTW - STL

1 stop17h 15mMultiple Airlines

Sat 1/178:32 pmSTL - DTW

1 stop16h 45mMultiple Airlines

Deal found 12/13

$154

Thu 1/2910:54 amDTW - ORD

1 stop12h 42mMultiple Airlines

Wed 2/45:32 pmORD - DTW

1 stop18h 39mMultiple Airlines

Deal found 12/14

$149

Thu 1/2910:54 amDTW - ORD

1 stop12h 42mMultiple Airlines

Sat 1/316:03 amORD - DTW

1 stop6h 27mMultiple Airlines

Deal found 12/15

$150

Thu 1/2910:54 amDTW - ORD

1 stop12h 42mMultiple Airlines

Sun 2/14:43 pmORD - DTW

1 stop16h 03mMultiple Airlines

Deal found 12/14

$154

One-way flights from Detroit to Illinois
Search for one-way flight options from Detroit to Illinois. Find affordable one-way fares based on user searches. Data last updated December 16, 2025.

Wed 2/119:35 amDTW - STL

1 stop7h 18mFrontier

Deal found 12/15

$64

Wed 2/258:48 pmDTW - STL

1 stop28h 11mFrontier

Deal found 12/14

$68

Wed 1/79:46 amDTW - ORD

1 stop7h 14mSpirit Airlines

Deal found 12/15

$68

Tue 2/108:48 pmDTW - STL

1 stop26h 39mFrontier

Deal found 12/15

$70

Tue 1/2010:07 pmDTW - ORD

1 stop12h 05mSpirit Airlines

Deal found 12/16

$72

Mon 1/125:15 amDTW - ORD

1 stop13h 37mSpirit Airlines

Deal found 12/14

$73

Sat 1/1710:07 pmDTW - ORD

1 stop12h 05mSpirit Airlines

Deal found 12/15

$74

Wed 2/258:48 pmDTW - MDW

1 stop18h 38mFrontier

Deal found 12/15

$74

Tue 1/1311:00 amDTW - STL

1 stop20h 51mMultiple Airlines

Deal found 12/16

$76

Wed 1/1411:00 amDTW - ORD

1 stop6h 52mMultiple Airlines

Deal found 12/16

$76

Thu 1/810:27 amDTW - MDW

1 stop28h 39mMultiple Airlines

Deal found 12/15

$76

Tue 1/612:40 pmDTW - ORD

Nonstop1h 28mDelta

Deal found 12/15

$77

Find flight deals from Detroit to Illinois

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$137 (Kiwi.com)
One-way from	$64 (Expedia)
Popular in	December
Cheapest in	April
Average price	$340
Good round-trip deal	$291 or less
Good one-way deal	$185 or less

Provider with most accurate pricing for Detroit (DTT)-Chicago (CHI) flight deals.

Search Deals

Provider most trusted by Cheapflights users for Detroit (DTT)-Chicago (CHI) flights.

Search Deals

From Detroit (DTT) to Illinois

Search Deals

One-way flight from Detroit (DTT) to Illinois

Search Deals

Highest demand for flights based on searches. 15% potential increase in price ($43 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($10 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Price to beat on a round-trip flight from Detroit (DTT) to Illinois.

Search Deals

Price to beat on a one-way flight from Detroit (DTT) to Illinois.

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Tue 1/13

7:15 am-7:58 am

Nonstop1h 43m

Chicago O'Hare Intl

Tue 1/20

2:23 pm-5:03 pm

Nonstop1h 40m

$153

DetroitChicago

DTW - MDW

DTWMDW

Detroit Metropolitan Wayne County

Tue 1/13

12:25 pm-12:48 pm

Nonstop1h 23m

Chicago Midway

Tue 1/20

6:35 pm-8:45 pm

Nonstop1h 10m

$153

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Mon 1/12

4:59 pm-5:26 pm

Nonstop1h 27m

Chicago O'Hare Intl

Wed 2/11

6:00 pm-8:28 pm

Nonstop1h 28m

$171

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Thu 1/15

9:00 am-9:31 am

Nonstop1h 31m

Chicago O'Hare Intl

Thu 2/5

2:23 pm-5:03 pm

Nonstop1h 40m

$171

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Mon 1/12

4:59 pm-5:26 pm

Nonstop1h 27m

Chicago O'Hare Intl

Mon 1/19

10:35 am-12:56 pm

Nonstop1h 21m

$171

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Mon 1/12

11:05 am-11:48 am

Nonstop1h 43m

Chicago O'Hare Intl

Wed 1/14

7:35 pm-10:10 pm

Nonstop1h 35m

$171

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Tue 1/6

12:40 pm-1:08 pm

Nonstop1h 28m

Chicago O'Hare Intl

Wed 1/7

11:05 am-1:27 pm

Nonstop1h 22m

$171

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Thu 1/29

8:38 pm-9:05 pm

Nonstop1h 27m

Chicago O'Hare Intl

Tue 2/3

10:35 am-12:56 pm

Nonstop1h 21m

$171

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Sat 1/17

12:40 pm-1:08 pm

Nonstop1h 28m

Chicago O'Hare Intl

Sat 1/24

6:50 am-9:22 am

Nonstop1h 32m

$171

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Thu 1/8

12:40 pm-1:08 pm

Nonstop1h 28m

Chicago O'Hare Intl

Mon 1/12

6:15 pm-8:43 pm

Nonstop1h 28m

$171

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 60 results

...

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, November is the cheapest month in which you can book a flight from Detroit to Illinois (average of $53). Flying from Detroit to Illinois in July is currently the most expensive (average of $121). 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?

It’s typically best to fly out from Detroit to Illinois in the afternoon. Doing so could potentially save you 35% on the flight price compared to flying at noon, which is usually more expensive.

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

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

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

Reviews of airlines servicing Illinois

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

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Southwest

7.9

Good

4,250 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Delta

7.9

Good

8,008 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

United Airlines

7.4

Good

9,092 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

American Airlines

7.2

Good

11,049 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

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.
How long is the flight from Detroit to Illinois?
Airlines like United Airlines, Delta, and American Airlines fly from Detroit to Illinois in about 1h 23m. The time it takes to get you to your destination can typically vary by up to 5h 06m. Airlines will cover a distance of 227 mi. This flight may include one or multiple stops.
What are the cheapest airlines to fly from Detroit to Illinois one-way?
To fly one-way, consider booking your trip with Southwest, which is currently one of the cheapest options available, starting at $38. Delta flights start at $46 while deals on American Airlines start at $48 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: Air France (90%), Royal Jordanian (84%), Envoy Air( 84%).
What are the cheapest flights from Detroit to Illinois?
On average you can expect to pay $871 for a flight from Detroit to Illinois. The cheapest flight overall is $119 while the most popular route, (Detroit Metropolitan Wayne County - Chicago O'Hare Intl) is currently priced at $136.
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, November is the cheapest month in which you can book a flight from Detroit to Illinois (average of $53). Flying from Detroit to Illinois in July is currently the most expensive (average of $121). 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

Browse thousands of different options on Cheapflights for your next trip

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Complete your trip

Illinois car rentals

Chicago O'Hare Intl Airport car rentals

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Top 4 airlines flying from Detroit to Illinois

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$97	Average$229	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$97	Average$413	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$97	Average$257	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$97	Average$275	FlexibilityNo cancel fee	On-time63%

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$64+ 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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from Detroit to Illinois

Cheapest flights from Detroit to IllinoisExplore 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 December 16, 2025.

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 December 16, 2025.

Find flight deals from Detroit to Illinois

Keep the following information in mind while searching for Detroit to Illinois flight deals. Data was last updated December 16, 2025.

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Best time to book a flight from Detroit to Illinois

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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?

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 December 16, 2025.

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

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

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

Reviews of airlines servicing Illinois

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.

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.

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Top 4 airlines flying from Detroit to Illinois

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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 December 16, 2025.