Route
DEN → GRR
Denver International Airport Gerald R. Ford International Airport
How punctual is this route?
- On-time arrivals
- 76.5%
- Less than 15 minutes late
- Cancelled
- 0.2%
- Of scheduled flights
- Average delay when late
- 58 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,235
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 50%
- Airline (crew, maintenance, cleaning) 28%
- Air traffic control & airport 21%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 78.3% | 115 |
| October 2025 | 77.5% | 111 |
| November 2025 | 78.4% | 102 |
| December 2025 | 63.7% | 102 |
| January 2026 | 77.9% | 97 |
| February 2026 | 81.9% | 84 |
| March 2026 | 81.2% | 70 |
| April 2026 | 85.3% | 95 |
| May 2026 | 82.1% | 106 |
| June 2026 | 70.2% | 114 |
| July 2026 | 74.1% | 118 |
| August 2026 | 72.5% | 121 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| United Airlines | 727 | 78.3% | 0.3% | 61 min |
| Southwest Airlines | 359 | 69.5% | 0.3% | 50 min |
| Frontier Airlines | 148 | 85.1% | 0.0% | 77 min |
| SkyWest Airlines | 1 | 100.0% | 0.0% | — |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA2637
12% late · 340 flights
-
UA2121
32% late · 237 flights
-
F91248
15% late · 148 flights
-
WN1918
21% late · 58 flights
-
UA1770
29% late · 55 flights
-
WN1539
42% late · 52 flights
-
WN636
39% late · 46 flights
-
WN1860
10% late · 42 flights
-
UA788
36% late · 36 flights
-
WN1476
35% late · 31 flights
-
WN1581
29% late · 31 flights
-
UA1120
4% late · 24 flights
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