Historical on-time performance
Baltimore to Grand Rapids
528 miData through Dec 2025Source: US DOT · BTS
Flights on BWI–GRR arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.3%of scheduled flights
based on 380 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time79%Medianon timep9040 minCancel0.3%Flights380
Why flights run late
Delay causes
- Airline31%
- Weather14%
- Air traffic (NAS)12%
- Late aircraft42%
- Security1%
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 BWI → GRR
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 73% to 86% on time.
- Mornings86% on time · p90 15 min · 154 flights · limited
- Middays84% on time · p90 20 min · 802 flights
- Evenings73% on time · p90 35 min · 60 flights · limited
- Afternoons73% on time · p90 40 min · 97 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 90% on time.
- Tuesdays90% on time · p90 10 min · 165 flights · limited
- Wednesdays86% on time · p90 25 min · 165 flights · limited
- Mondays83% on time · p90 25 min · 167 flights · limited
- Fridays80% on time · p90 25 min · 164 flights · limited
- Thursdays78% on time · p90 25 min · 165 flights · limited
- Sundays78% on time · p90 30 min · 165 flights · limited
- Saturdays76% on time · p90 35 min · 164 flights · limited
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