Carrier route record
YXDTW→GRR
Republic Airways · Detroit to Grand Rapids
- Flights
- 144
- Period
- September 2025 to August 2026
- Share of route
- 9%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Republic Airways.
Republic on DTW to GRR earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 19 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 144 flights, with a median arrival 13 minutes early.
Set against the rest of the country, Republic's DTW to GRR record is 19 points better than the US average of 77.3%. That gap is worth roughly 192 fewer late arrivals for every thousand flights.
Key figures
On time
96.5%
Arrivals under 15 minutes late, of 144 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
Whole route
75.1%
Every carrier on DTW to GRR, 1,619 flights
These figures cover 144 flights between September 2025 and August 2026. The median arrival is 13 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
Republic against every carrier on DTW to GRR
Republic flew 144 of the 1,619 flights on DTW to GRR, about 9% of it. Its 96.5% on time is 21 points better than the route as a whole, which runs 75.1%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Republic at 96.5% to Delta at 31.2%. One 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 Airways (this page)thin sample | 144 | 96.5% | 58 min | 0.00% | A+ |
| SkyWest Airlines | 1,459 | 73.4% | 102 min | 0.96% | C+ |
| Delta Air Linesthin sample | 16 | 31.2% | 60 min | 0.00% | F+ |
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When Republic 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 144 flights.
- 5am–8am—
- 8am–11am43 flights97.7%
- 11am–2pm1 flights—
- 2pm–5pm33 flights97.0%
- 5pm–8pm67 flights95.5%
- 8pm–5am—
Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.
The 8am–11am window is the strongest at 97.7% on time. The full set of windows spans 2 points.
Across the year
Republic on DTW to GRR through the year
- Jul–Sep 20252 flights—
- Oct–Dec 20254 flights—
- Apr–Jun 202652 flights94.2%
- Jul–Sep 202686 flights97.7%
Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 96.5% on time across 144 flights.
Split by quarter, Republic on DTW to GRR logged 2 flights in Jul–Sep 2025, 4 flights in Oct–Dec 2025, 52 flights in Apr–Jun 2026 and 86 flights in Jul–Sep 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 96.5% annual figure is the one to use.
Arrival by arrival
How late Republic on DTW to GRR runs when it is late
Republic on DTW to GRR often beats the schedule: 62 of 144 completed flights, 43%, arrived 15 minutes or more early. When Republic on DTW to GRR is late it tends to be very late: 3 of its 5 late arrivals were an hour or more behind, and 0 were two hours or more. Not one arrived two hours late.
- 15+ min early62 flights43.1%
- Within 15 min77 flights53.5%
- 15–29 min late1 flights0.7%
- 30–59 min late1 flights0.7%
- 1–2 hours late3 flights2.1%
- 2+ hours late0 flights0.0%
Scale runs 0% to 100%.
Share of 144 completed flights by arrival against schedule.
Only 7 of 144 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for Republic on DTW to GRR
The latest arrival of the period was on 12 May 2026, 1 hour 21 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 12 May 2026 | 1 hour 21 minutes | Carrier |
| 23 July 2026 | 1 hour 17 minutes | Carrier |
| 14 June 2026 | 1 hour 2 minutes | Late-arriving aircraft |
| 10 August 2026 | 51 minutes | Late-arriving aircraft |
| 17 June 2026 | 20 minutes | Carrier |
Delay causes
Why Republic runs late on this route
Carrier accounts for 61% of the 291 delay minutes carriers reported here, and the remaining four split what is left.
- 61%Carrier
- 39%Late-arriving aircraft
39% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 291 reported delay minutes here, that single category outweighs weather by 39 to one. The split is drawn from 291 reported delay minutes.
The largest share of delay minutes, 61%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 178 of the 291 delay minutes reported here.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 2.1% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
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 8am–11am window matters as much as it does.
The return leg runs 94.4% on time across 144 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 144 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.
What to do with this
Booking Republic on DTW to GRR
Put together: treat all of this as provisional. 144 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 96.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 144 completed flights over 12 months sit behind that.
Related
Where to go next
- DTW to GRR, every carrier
- Republic on GRR to DTW, the return leg
- SkyWest Airlines on DTW to GRR73.4%
- Republic Airways network-wide record
- Detroit Metropolitan Wayne County (DTW) delay statistics
- Why the first flight of the morning is statistically safest
- How to read this site: grades, sample sizes, and honest caveats
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.