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$55+ 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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
DTT — ORD
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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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 January 29, 2026.

This Expedia deal was found by Cheapflights users on 1/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/258:30 am
DTW
-
STL
1 stop8h 23m
Frontier
Wed 3/48:17 pm
STL
-
DTW
1 stop10h 50m
Frontier
Deal found 1/27$128
This Mytrip deal was found by Cheapflights users on 1/27. 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.
Sat 2/2110:59 pm
DTW
-
ORD
1 stop11h 23m
Spirit Airlines
Sat 2/286:51 pm
ORD
-
DTW
1 stop11h 58m
Spirit Airlines
Deal found 1/27$128
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Tue 2/2410:59 pm
DTW
-
ORD
2 stops21h 12m
Spirit Airlines
Tue 3/36:51 pm
ORD
-
DTW
1 stop11h 58m
Spirit Airlines
Deal found 1/27$129
This CheapOair deal was found by Cheapflights users on 1/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/1710:05 pm
DTW
-
ORD
1 stop12h 17m
Spirit Airlines
Wed 2/186:51 pm
ORD
-
DTW
1 stop11h 58m
Spirit Airlines
Deal found 1/27$132
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/255:09 am
DTW
-
ORD
1 stop20h 31m
Spirit Airlines
Wed 3/46:51 pm
ORD
-
DTW
1 stop11h 58m
Spirit Airlines
Deal found 1/28$135
This Mytrip deal was found by Cheapflights users on 1/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/2410:59 pm
DTW
-
ORD
2 stops21h 12m
Spirit Airlines
Sat 2/286:51 pm
ORD
-
DTW
1 stop11h 58m
Spirit Airlines
Deal found 1/28$136
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/1610:59 pm
DTW
-
ORD
1 stop26h 41m
Multiple Airlines
Fri 2/208:59 am
ORD
-
DTW
1 stop7h 21m
Multiple Airlines
Deal found 1/26$138
This CheapOair deal was found by Cheapflights users on 1/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/1710:05 pm
DTW
-
ORD
1 stop12h 17m
Spirit Airlines
Thu 2/196:51 pm
ORD
-
DTW
1 stop11h 58m
Spirit Airlines
Deal found 1/28$139
This CheapOair deal was found by Cheapflights users on 1/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2010:05 pm
DTW
-
ORD
1 stop12h 17m
Spirit Airlines
Tue 2/246:51 pm
ORD
-
DTW
1 stop11h 58m
Spirit Airlines
Deal found 1/28$141
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/85:09 am
DTW
-
MDW
1 stop8h 53m
Multiple Airlines
Thu 3/127:30 am
MDW
-
DTW
1 stop6h 54m
Multiple Airlines
Deal found 1/28$143
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 2/2210:10 am
DTW
-
STL
1 stop21h 41m
Multiple Airlines
Mon 2/238:22 pm
STL
-
DTW
1 stop18h 35m
Multiple Airlines
Deal found 1/27$144
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/410:59 pm
DTW
-
ORD
2 stops35h 07m
Multiple Airlines
Wed 3/117:18 pm
ORD
-
DTW
1 stop11h 49m
Multiple Airlines
Deal found 1/28$144

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$128
(Expedia)

One-way from

$55
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$242

Good round-trip deal

$301 or less

Good one-way deal

$209 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. 23% potential increase in price ($68 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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

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 January 29, 2026.
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

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Tue 2/24

9:49 am-3:52 pm

1 stop7h 03m

Chicago O'Hare Intl

Mon 3/2

12:01 pm-6:28 pm

1 stop5h 27m

$138

DetroitChicago

DTW - MDW

DTWMDW

Detroit Metropolitan Wayne County

Sun 3/8

5:09 am-1:02 pm

1 stop8h 53m

Chicago Midway

Thu 3/12

7:30 am-3:24 pm

1 stop6h 54m

$143

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Thu 2/26

10:59 pm-9:22 am

1 stop11h 23m

Chicago O'Hare Intl

Sat 3/7

5:30 am-3:57 pm

1 stop9h 27m

$158

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Thu 2/26

9:18 am-6:29 pm

1 stop10h 11m

Chicago O'Hare Intl

Sun 3/8

12:05 pm-7:49 am

1 stop18h 44m

$162

DetroitChicago

DTW - MDW

DTWMDW

Detroit Metropolitan Wayne County

Fri 2/27

10:00 pm-3:19 pm

2 stops18h 19m

Chicago Midway

Sun 3/8

7:30 am-7:49 am

1 stop23h 19m

$167

DetroitChicago

DTW - MDW

DTWMDW

Detroit Metropolitan Wayne County

Thu 2/26

2:35 pm-10:29 pm

1 stop8h 54m

Chicago Midway

Mon 3/2

2:19 pm-9:05 pm

1 stop5h 46m

$169

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Sat 2/21

6:25 pm-11:59 pm

1 stop6h 34m

Lambert-St Louis

Wed 2/25

8:17 pm-8:07 am

1 stop10h 50m

$175

DetroitChicago

DTW - MDW

DTWMDW

Detroit Metropolitan Wayne County

Sat 3/7

2:35 pm-10:24 pm

1 stop8h 49m

Chicago Midway

Sun 3/8

2:41 pm-8:07 am

1 stop16h 26m

$176

DetroitChicago

DTW - MDW

DTWMDW

Detroit Metropolitan Wayne County

Thu 2/26

2:35 pm-10:29 pm

1 stop8h 54m

Chicago Midway

Thu 3/5

7:30 am-3:57 pm

1 stop7h 27m

$182

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Sun 3/8

10:59 pm-9:22 am

1 stop11h 23m

Chicago O'Hare Intl

Thu 3/12

6:01 pm-11:12 am

2 stops16h 11m

$185

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 60 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, 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 February 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 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 January 29, 2026.

It’s typically best to fly out from Detroit to Illinois in the morning. Doing so could potentially save you 25% 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?

Use this chart to determine the cheapest time to fly round-trip from Detroit to Illinois. Price data was last updated on January 24, 2026.

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.

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 January 29, 2026.

The most flights from DTT to USIL are scheduled on a Thursday (69 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (35 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 January 29, 2026.
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
4,267 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

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
8.0
Very good
4,267 reviews
Southwest
8.0
Very good
4,267 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

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
8,128 reviews
Southwest
8.0
Very good
4,267 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

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
9,215 reviews
Southwest
8.0
Very good
4,267 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

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
11,205 reviews
Southwest
8.0
Very good
4,267 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

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

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.

  • How long is the flight from Detroit to Illinois?

    Airlines like Frontier, Spirit Airlines, and Delta fly from Detroit to Illinois in about 1h 29m. The time it takes to get you to your destination can typically vary by up to 9h 54m. Airlines will cover a distance of 234 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: Envoy Air (88%), GoJet (87%), Emirates( 77%).

  • What are the cheapest flights from Detroit to Illinois?

    On average you can expect to pay $943 for a flight from Detroit to Illinois. The cheapest flight overall is $147 while the most popular route, (Detroit Metropolitan Wayne County - Chicago O'Hare Intl) is currently priced at $122.

  • 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 February 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.

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 4 airlines flying from Detroit to Illinois

Discover the top 4 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$93Average$257FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$94Average$380FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$97Average$238FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$97Average$275FlexibilityNo cancel feeOn-time63%

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