Denver (DEN) to Grand Rapids (GRR): On-Time Performance
Data through May 2026
The calendar drives reliability on DEN–GRR. October 2024 flights landed on schedule 91% of the time, but May 2025 dropped to 54% — a gap of 37 points. Across the full period the route averages 76% on-time against a national 78%. Morning departures also hold up better than evening ones (85% vs 63%), which matters most in the rough months.
- On-time
- 76%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 0.2%
- Flights/day
- 3.4
- last 12 months
- Duration
- 2h 32m
- scheduled
- Distance
- 1,015 mi
Best airline from DEN to GRR
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Frontier Airlinesmost reliable | 80% | 14 min | 0.3% | 287 |
| United Airlines | 77% | 15 min | 0.1% | 1,461 |
| Southwest Airlines | 72% | 16 min | 0.3% | 771 |
Monthly on-time trend
Best time to fly from DEN to GRR
Aim for departures around 10 a.m. (87% on-time); avoid 7 p.m. departures (51%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 15 min |
| Tuesdaybest | 81% | 14 min |
| Wednesday | 76% | 15 min |
| Thursday | 72% | 17 min |
| Friday | 76% | 17 min |
| Saturday | 79% | 10 min |
| Sunday | 70% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft46%
- Airline operations34%
- National airspace system18%
- Weather2%
Frequently asked questions
- How often are flights from DEN to GRR delayed?
- 24% of DEN–GRR 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 15 minutes.
- Which airline is most reliable from DEN to GRR?
- Frontier Airlines has the best on-time record on this route at 80%, based on 287 flights. 3 airlines flew DEN–GRR frequently enough to compare in this period.
- What is the best time of day to fly from DEN to GRR?
- Departures around 10 a.m. have the best record (87% on-time), while departures around 7 p.m. have the worst (51%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from DEN to GRR?
- The scheduled DEN–GRR flight time averages 2h 32m over 1,015 miles. Actual arrival times vary — flights on this route land 15+ minutes late 24% of the time.
- How often are DEN to GRR flights cancelled?
- 0.2% 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 DEN to GRR?
- May 2025 was the roughest month in this dataset, with only 54% of arrivals on time. The best was October 2024 at 91%. If your dates are flexible, that 37-point gap is worth planning around.
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Based on 2,520 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.