Historical on-time performance
Grand Rapids to Denver
Flights on GRR–DEN arrive on time 80% of the time over the last 12 months.
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
Too close to call — no single carrier is clearly more on-time here.
- Southwest AirlinesOn-time83%Medianon timep9025 minCancel0.0%Flights306
- United AirlinesOn-time79%Medianon timep9035 minCancel0.4%Flights728
Why flights run late
Delay causes
- Airline40%
- Weather2%
- Air traffic (NAS)33%
- Late aircraft24%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather67%
- Air traffic (NAS)33%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 3 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 GRR → DEN
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 68% to 86% on time.
- Mornings86% on time · p90 20 min · 1,386 flights
- Middays83% on time · p90 20 min · 293 flights
- Afternoons76% on time · p90 35 min · 1,645 flights
- Overnights72% on time · p90 80 min · 315 flights
- Evenings68% on time · p90 55 min · 203 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 78% to 82% on time.
- Tuesdays82% on time · p90 30 min · 494 flights
- Wednesdays80% on time · p90 30 min · 512 flights
- Sundays80% on time · p90 35 min · 597 flights
- Thursdays79% on time · p90 35 min · 519 flights
- Mondays79% on time · p90 40 min · 556 flights
- Fridays78% on time · p90 40 min · 561 flights
- Saturdays78% on time · p90 35 min · 603 flights
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