Route reliability record
DTW→ORD
Detroit to Chicago
- Flights
- 61,292
- Period
- June 2025 to May 2026
- Distance
- 234 mi
- Carriers
- 1
This route carries a cancellation problem, not just a delay problem: 3.5% of scheduled flights never operate, against 2.2% nationally. Of the ones that do fly, close to three flights in four arrive on time, worth a B− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 61,292 flights, with a median arrival 0 minutes early.
The US average over the same twelve months is 75.9%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
77.1%
Arrivals under 15 minutes late, of 58,947 completed flights
Avg delay
49 min
Across delayed arrivals only, not all flights
Cancelled
3.50%
National rate is 2.23%
Best carrier
American
77.1% on time across 61,292 flights
These figures cover 61,000 flights between June 2025 and May 2026. Beyond the headline rate, 9.2% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
Which airline is most reliable on DTW to ORD
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| American Airlines | 61,292 | 77.1% | 51 min | 3.50% | B− |
Departure window
The best time of day to leave
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 61,000 flights.
- 5am–8am9,500 flights81.1%
- 8am–11am12,565 flights79.1%
- 11am–2pm11,339 flights77.4%
- 2pm–5pm10,726 flights75.3%
- 5pm–8pm11,033 flights73.5%
- 8pm–5am6,129 flights76.1%
Scale runs 65% to 85%. Rows with fewer than 30 flights show a dash.
The early departures do better, though not dramatically: 81.1% on time for the 5am–8am window against 73.5% for 5pm–8pm. Worth taking if the schedule allows, not worth an extra connection.
Across the year
When delays peak on this route
Twelve months, one bar each, drawn from the same 61,292 flights. The strip shows how much of this route's record is set by the calendar rather than by the operation.
January is the weak month at 70.1% on time, against 81.1% in May. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days.
Across the week, Tuesday is the strongest day at 78.9% on time and Saturday the weakest at 74.5%. 4 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 661,000 reported delay minutes.
- 41%Late-arriving aircraft
- 27%Carrier
- 24%National Airspace System
- 8%Extreme weather
- 0%Security
41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 661,000 reported delay minutes here, that single category outweighs weather by 5 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 81.1% on time here.
Cancellations run at 3.50%, against 2.23% nationally. That is about one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here actually costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.2% of arrivals land a full hour or more behind schedule, against 8.6% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
At 234 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5am–8am window matters as much as it does.
The return leg runs 78.5% on time across 10,825 flights, within about a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
61,292 flights sit behind these numbers, which is a large enough sample that the headline rate is not moving on noise. Where a sub-group falls below 30 flights the site shows a dash instead of a percentage.
What to do with this
Booking this route
Put together: the delay figures matter less here than the 3.50% cancellation rate. A late arrival costs you roughly 50 minutes; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic.
Common questions
DTW to ORD questions
How often is DTW to ORD delayed?
Roughly one flight in four arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 22.9% of the 61,292 flights in this analysis, against 24.1% nationally. Delayed flights are late by roughly 50 minutes on average.
How reliable is DTW to ORD compared with the rest of the country?
77.1% of flights arrive on time here against a national 75.9%, a difference of about a point in its favour. That is worth a B− on this site's grading scale.
What time of day has the fewest delays on DTW to ORD?
The 5am–8am departure window is the strongest at 81.1% on time. The 5pm–8pm window is the weakest at 73.5%, 8 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are January delays on DTW to ORD?
January is the weakest month at 70.1% on time, compared with 81.1% in May. Across the year that is 11 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- ORD to DTW — the return legseparate record
- Detroit Metropolitan Wayne County (DTW) delay statistics
- Chicago O'Hare International (ORD) delay statistics
- American Airlines on-time record77.1%
- Why the first flight of the morning is statistically safest
- What a cancellation rate actually tells you (and what it hides)
Direction matters. DTW to ORD and ORD to DTW are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, June 2025 to May 2026. Updated monthly. How this data is collected.