Carrier route record
OODTW→GRR
SkyWest Airlines · Detroit to Grand Rapids
- Flights
- 1,459
- Period
- September 2025 to August 2026
- Share of route
- 90%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on DTW to GRR sits in the middle of the pack with a C+. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.3%. The late ones land close to two hours behind schedule. That rests on 1,459 flights, with a median arrival 6 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate SkyWest on DTW to GRR from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
73.4%
Arrivals under 15 minutes late, of 1,444 completed flights
Avg delay
102 min
Across delayed arrivals only, not all flights
Cancelled
0.96%
National rate is 1.89%
Whole route
75.1%
Every carrier on DTW to GRR, 1,619 flights
These figures cover 1,459 flights between September 2025 and August 2026. Beyond the headline rate, 13.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
SkyWest against every carrier on DTW to GRR
SkyWest flew 1,459 of the 1,619 flights on DTW to GRR, most of the route. Its 73.4% on time is 2 points worse than the route as a whole, which runs 75.1%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Republic at 96.5% to Delta at 31.2%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
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 |
|---|---|---|---|---|---|
| Republic Airwaysthin sample | 144 | 96.5% | 58 min | 0.00% | A+ |
| SkyWest Airlines (this page) | 1,459 | 73.4% | 102 min | 0.96% | C+ |
| Delta Air Linesthin sample | 16 | 31.2% | 60 min | 0.00% | F+ |
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Departure window
When SkyWest runs best on this route
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 1,459 flights.
- 5am–8am—
- 8am–11am297 flights73.7%
- 11am–2pm206 flights71.8%
- 2pm–5pm384 flights74.6%
- 5pm–8pm230 flights74.4%
- 8pm–5am342 flights72.0%
Scale runs 65% to 80%. Rows with fewer than 30 flights show a dash.
The time of day barely matters here. The 2pm–5pm window tops the set at 74.6% and 11am–2pm sits at 71.8%, 3 points apart across 1,459 flights. Pick the departure that suits the trip: whatever is going wrong here is not accumulating over the course of the day. The 2pm–5pm window is the busiest, with 384 flights scheduled in it.
Across the year
SkyWest on DTW to GRR through the year
December is the weak month at 45.3% on time, against 89.5% in September. 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. November was the busiest month here, with 190 flights.
Across the week, Saturday is the strongest day at 79.3% on time and Sunday the weakest at 69.5%, a spread of 10 points.
Arrival by arrival
How late SkyWest on DTW to GRR runs when it is late
When SkyWest on DTW to GRR is late it tends to be very late: 201 of its 384 late arrivals were an hour or more behind, and 105 were two hours or more.
- 15+ min early306 flights21.2%
- Within 15 min754 flights52.2%
- 15–29 min late85 flights5.9%
- 30–59 min late98 flights6.8%
- 1–2 hours late96 flights6.6%
- 2+ hours late105 flights7.3%
Scale runs 0% to 100%.
Share of 1,444 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 380 departures that left 15 minutes late or more, only 42 made it up before arrival. 46 flights left on time and still arrived late.
The worst days
Worst days for SkyWest on DTW to GRR
The latest arrival of the period was on 24 January 2026, 18 hours 10 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in March 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 24 January 2026 | 18 hours 10 minutes | Carrier |
| 17 March 2026 | 13 hours 39 minutes | Carrier |
| 12 April 2026 | 13 hours 17 minutes | Carrier |
| 23 March 2026 | 12 hours 37 minutes | Carrier |
| 23 March 2026 | 12 hours 1 minute | Carrier |
Delay causes
Why SkyWest runs late on this route
Carrier accounts for 70% of the 39,000 delay minutes carriers reported here, and the remaining four split what is left.
- 70%Carrier
- 20%Extreme weather
- 9%National Airspace System
Extreme weather accounts for 20% 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 3.3 times the usual weather exposure. The split is drawn from 38,988 reported delay minutes.
The largest share of delay minutes, 70%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 27,000 of the 39,000 delay minutes reported here.
Cancellations sit at 0.96% against a national 1.89%, which is ordinary. Diversions add another 0.07%.
Connections and stage length
What a delay here costs
13.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 120 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 2pm–5pm window matters as much as it does.
The return leg is a different operation and performs like one: it runs 78.1% on time across 1,459 flights, 5 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 5 points of difference.
The sample behind these figures is 1,459 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking SkyWest on DTW to GRR
Put together: the calendar is the biggest lever here, not the carrier or the hour. September runs 89.5% on time and December 45.3%, a swing of 44 points. If the dates move at all, move them out of December before you think about anything else. 1,444 completed flights over 12 months sit behind that.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.