Route reliability record
DTW→GRB
Detroit to Green Bay
- Flights
- 812
- Period
- July 2025 to June 2026
- Distance
- 287 mi
- Carriers
- 2
This route sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 812 DTW to GRB flights, with a median arrival 7 minutes early.
Best time to fly DTW to GRB: a 8am–11am departure, ideally on a Thursday. Flights in that window arrived on time 76.6% of the time and Thursday flights 82.3%, against 72.3% for the route overall.
The national on-time rate over the same period is 77.6%, so this route runs 5 points behind the country as a whole. Across a thousand flights that is about 53 extra late arrivals.
Key figures
On time
72.3%
Arrivals under 15 minutes late, of 791 completed flights
Avg delay
96 min
Across delayed arrivals only, not all flights
Cancelled
2.22%
National rate is 1.81%
Best carrier
SkyWest
73.7% on time across 626 flights
These figures cover 812 flights between July 2025 and June 2026. Beyond the headline rate, 14.3% 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 GRB
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 |
|---|---|---|---|---|---|
| SkyWest Airlines | 626 | 73.7% | 110 min | 2.40% | C |
| Delta Air Linesthin sample | 186 | 67.8% | 58 min | 1.61% | C |
Best ways to make this trip
The most reliable ways to fly Detroit to Green Bay
Every airline on this route and on the routes between nearby airports, ranked by how often a scheduled flight actually operated and arrived on time. 1 of the top 2 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. DTW → ATWDetroit to Appleton | SkyWest Airlines | 73.6% | 74.7% | 1.51% | 2pm–5pm, Sat (route) | — |
| 2. DTW → GRBDetroit to Green Bay | SkyWest Airlines | 71.9% | 73.7% | 2.40% | 8am–11am, Thu | — |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
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 812 flights.
- 5am–8am—
- 8am–11am267 flights76.6%
- 11am–2pm—
- 2pm–5pm252 flights69.4%
- 5pm–8pm27 flights—
- 8pm–5am266 flights70.0%
Scale runs 60% to 80%. Rows with fewer than 30 flights show a dash.
The early departures do better, though not dramatically: 76.6% on time for the 8am–11am window against 69.4% for 2pm–5pm. Worth taking if the schedule allows, not worth an extra connection. The 8am–11am window is the busiest, with 267 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 37 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
December is the weak month at 54.0% on time, against 91.2% in June. 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. May was the busiest month here, with 93 flights.
Across the week, Thursday is the strongest day at 82.3% on time and Friday the weakest at 62.8%. 20 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
One category carries most of the weight here. Carrier accounts for 69% of the 21,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 69%Carrier
- 18%Extreme weather
- 8%National Airspace System
- 4%Late-arriving aircraft
Extreme weather accounts for 18% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 3.0 times the usual weather exposure. The split is drawn from 21,026 reported delay minutes.
The largest share of delay minutes, 69%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 14,000 of the 21,000 delay minutes reported here.
Cancellations sit at 2.22% against a national 1.81%, which is ordinary. Diversions add another 0.37%.
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. 14.3% of arrivals land a full hour or more behind schedule, against 8.1% 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 287 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 8am–11am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 80.2% on time across 812 flights, 8 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 8 points of difference.
One caution: this is a thin sample. 812 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
Work out the risk of missing a connection in GRB after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 812 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 72.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 791 completed flights over 12 months sit behind that.
Common questions
DTW to GRB questions
How often is DTW to GRB delayed?
Roughly one flight in four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 27.7% of the 812 flights in this analysis, against 22.4% nationally. Delayed flights are late by an hour and a half on average.
How reliable is DTW to GRB compared with the rest of the country?
72.3% of flights arrive on time here against a national 77.6%, a difference of 5 points against it. That is worth a C on this site's grading scale.
What time of day has the fewest delays on DTW to GRB?
The 8am–11am departure window is the strongest at 76.6% on time. The 2pm–5pm window is the weakest at 69.4%, 7 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 December delays on DTW to GRB?
December is the weakest month at 54.0% on time, compared with 91.2% in June. Across the year that is 37 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
- GRB to DTW — the return legseparate record
- Detroit Metropolitan Wayne County (DTW) delay statistics
- SkyWest Airlines on DTW to GRB73.7%
- Delta Air Lines on DTW to GRB67.8%
- DTW to ORD, a related route72.0%
- ORD to GRB, a related route68.8%
- DTW to ATL, a related route79.0%
- SkyWest Airlines on-time record73.7%
- Delta Air Lines on-time record67.8%
- How often a connection fails at the major US hubs
- Worst months to fly in the US, ranked by the data
Direction matters. DTW to GRB and GRB to DTW are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Embed DTW to GRB’s on-time badge on your site
Paste this into a web page. The badge shows the current on-time rate, cancellation rate and grade, and updates every month. Preview it, or build a badge for another route or airport.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.