Carrier route record
YXGRR→DTW
Republic Airways · Grand Rapids to Detroit
- 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 GRR to DTW earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 17 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 45 minutes. That rests on 144 flights, with a median arrival 16 minutes early.
Set against the rest of the country, Republic's GRR to DTW record is 17 points better than the US average of 77.3%. That gap is worth roughly 171 fewer late arrivals for every thousand flights.
Key figures
On time
94.4%
Arrivals under 15 minutes late, of 144 completed flights
Avg delay
46 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
Whole route
79.6%
Every carrier on GRR to DTW, 1,620 flights
These figures cover 144 flights between September 2025 and August 2026. The median arrival is 16 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 GRR to DTW
Republic flew 144 of the 1,620 flights on GRR to DTW, about 9% of it. Its 94.4% on time is 15 points better than the route as a whole, which runs 79.6%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Republic at 94.4% to Delta at 76.5%. 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 | 94.4% | 46 min | 0.00% | A+ |
| SkyWest Airlines | 1,459 | 78.1% | 106 min | 0.96% | B+ |
| Delta Air Linesthin sample | 17 | 76.5% | 98 min | 0.00% | B+ |
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–11am4 flights—
- 11am–2pm39 flights89.7%
- 2pm–5pm27 flights—
- 5pm–8pm50 flights94.0%
- 8pm–5am24 flights—
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is the strongest at 94.0% on time. The full set of windows spans 4 points.
Across the year
Republic on GRR to DTW through the year
- Jul–Sep 20252 flights—
- Oct–Dec 20254 flights—
- Apr–Jun 202652 flights90.4%
- Jul–Sep 202686 flights96.5%
Scale runs 80% 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 94.4% on time across 144 flights.
Split by quarter, Republic on GRR to DTW 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 94.4% annual figure is the one to use.
Arrival by arrival
How late Republic on GRR to DTW runs when it is late
Republic on GRR to DTW often beats the schedule: 82 of 144 completed flights, 57%, arrived 15 minutes or more early. The 8 late arrivals split 2 under half an hour, 5 between 30 and 60 minutes, and 1 an hour or more. Not one arrived two hours late.
- 15+ min early82 flights56.9%
- Within 15 min54 flights37.5%
- 15–29 min late2 flights1.4%
- 30–59 min late5 flights3.5%
- 1–2 hours late1 flights0.7%
- 2+ hours late0 flights0.0%
Scale runs 0% to 100%.
Share of 144 completed flights by arrival against schedule.
Only 9 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 GRR to DTW
The latest arrival of the period was on 4 July 2026, 1 hour 33 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 4 July 2026 | 1 hour 33 minutes | Carrier |
| 12 May 2026 | 54 minutes | Carrier |
| 21 May 2026 | 51 minutes | Carrier |
| 15 June 2026 | 48 minutes | Carrier |
| 23 July 2026 | 42 minutes | Carrier |
Delay causes
Why Republic runs late on this route
Carrier accounts for 78% of the 369 delay minutes carriers reported here, and the remaining four split what is left.
- 78%Carrier
- 18%Late-arriving aircraft
- 4%Extreme weather
- 1%National Airspace System
The largest share of delay minutes, 78%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 287 of the 369 delay minutes reported here. The split is drawn from 369 reported delay minutes.
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 0.7% 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 5pm–8pm window matters as much as it does.
The return leg runs 96.5% 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 GRR to DTW
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 94.4% 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
- GRR to DTW, every carrier
- Republic on DTW to GRR, the return leg
- SkyWest Airlines on GRR to DTW78.1%
- Republic Airways network-wide record
- Detroit Metropolitan Wayne County (DTW) delay statistics
- How to read this site: grades, sample sizes, and honest caveats
- The best time of day to fly, according to 7.05 million flight records
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.