Grand Rapids (GRR) to Denver (DEN): On-Time Performance
Data through May 2026
Grand Rapids (GRR) to Denver (DEN) effectively runs on two schedules. In October 2024, 92% of arrivals were on time; in January 2026 that fell to 57% — a 34-point seasonal swing. Across the full period the route averages 80% on-time against a national 78%. Morning departures also hold up better than evening ones (86% vs 71%), which matters most in the rough months.
- On-time
- 80%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 0.3%
- Flights/day
- 3.4
- last 12 months
- Duration
- 2h 57m
- scheduled
- Distance
- 1,015 mi
Best airline from GRR to DEN
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 82% | 13 min | 0.3% | 1,461 |
| Southwest Airlines | 79% | 11 min | 0.1% | 770 |
| Frontier Airlines | 74% | 20 min | 0.7% | 286 |
Monthly on-time trend
Best time to fly from GRR to DEN
Aim for departures around 6 a.m. (92% on-time); avoid 4 p.m. departures (67%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 79% | 13 min |
| Tuesdaybest | 82% | 10 min |
| Wednesday | 80% | 11 min |
| Thursday | 81% | 16 min |
| Friday | 79% | 15 min |
| Saturday | 80% | 12 min |
| Sunday | 80% | 16 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft31%
- Airline operations30%
- National airspace system34%
- Weather6%
Frequently asked questions
- How often are flights from GRR to DEN delayed?
- 20% of GRR–DEN flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 13 minutes.
- Which airline is most reliable from GRR to DEN?
- United Airlines has the best on-time record on this route at 82%, based on 1,461 flights. 3 airlines flew GRR–DEN frequently enough to compare in this period.
- What is the best time of day to fly from GRR to DEN?
- Departures around 6 a.m. have the best record (92% on-time), while departures around 4 p.m. have the worst (67%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from GRR to DEN?
- The scheduled GRR–DEN flight time averages 2h 57m over 1,015 miles. Actual arrival times vary — flights on this route land 15+ minutes late 20% of the time.
- How often are GRR to DEN flights cancelled?
- 0.3% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from GRR to DEN?
- January 2026 was the roughest month in this dataset, with only 57% of arrivals on time. The best was October 2024 at 92%. If your dates are flexible, that 34-point gap is worth planning around.
Explore related pages
More routes from GRR
Based on 2,518 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.