Historical on-time performance
Denver to Grand Rapids
1,015 miData through May 2026Source: US DOT · BTS
Flights on DEN–GRR arrive on time 72% of the time over the last 12 months.
On-time rate72%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights
based on 1,034 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time75%Medianon timep9045 minCancel0.3%Flights728
- Southwest AirlinesOn-time65%Medianon timep9060 minCancel0.0%Flights306
Why flights run late
Delay causes
- Airline28%
- Weather1%
- Air traffic (NAS)20%
- Late aircraft50%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather100%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 2 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly DEN → GRR
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 85% on time.
- Mornings85% on time · p90 20 min · 652 flights
- Middays81% on time · p90 25 min · 1,354 flights
- Afternoons76% on time · p90 40 min · 462 flights
- Evenings62% on time · p90 70 min · 1,358 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 78% on time.
- Wednesdays78% on time · p90 35 min · 513 flights
- Tuesdays78% on time · p90 45 min · 494 flights
- Saturdays75% on time · p90 40 min · 603 flights
- Fridays75% on time · p90 45 min · 561 flights
- Mondays74% on time · p90 45 min · 557 flights
- Thursdays71% on time · p90 45 min · 519 flights
- Sundays70% on time · p90 45 min · 597 flights
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