Historical on-time performance
Grand Rapids to Baltimore
528 miData through Dec 2025Source: US DOT · BTS
Flights on GRR–BWI arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.8%of scheduled flights
based on 379 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time78%Medianon timep9040 minCancel0.8%Flights379
Why flights run late
Delay causes
- Airline28%
- Weather1%
- Air traffic (NAS)27%
- Late aircraft44%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly GRR → BWI
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 68% to 92% on time.
- Mornings92% on time · p90 10 min · 60 flights · limited
- Middays84% on time · p90 25 min · 496 flights
- Afternoons75% on time · p90 30 min · 493 flights
- Evenings68% on time · p90 50 min · 105 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 85% on time.
- Tuesdays85% on time · p90 25 min · 165 flights · limited
- Wednesdays82% on time · p90 20 min · 165 flights · limited
- Saturdays82% on time · p90 30 min · 164 flights · limited
- Mondays79% on time · p90 30 min · 166 flights · limited
- Fridays79% on time · p90 25 min · 164 flights · limited
- Thursdays75% on time · p90 35 min · 165 flights · limited
- Sundays74% on time · p90 40 min · 165 flights · limited
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