Historical on-time performance
Baltimore to San Francisco
2,457 miData through Dec 2025Source: US DOT · BTS
Flights on BWI–SFO arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights
based on 845 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time82%Medianon timep9025 minCancel0.8%Flights661
- Southwest AirlinesOn-time64%Median5 minp9055 minCancel0.0%Flights184
Why flights run late
Delay causes
- Airline25%
- Weather9%
- Air traffic (NAS)26%
- Late aircraft39%
- 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 BWI → SFO
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 87% on time.
- Mornings87% on time · p90 15 min · 1,125 flights
- Middays72% on time · p90 50 min · 109 flights · limited
- Evenings71% on time · p90 40 min · 634 flights
- Afternoons66% on time · p90 95 min · 56 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 78% to 82% on time.
- Thursdays82% on time · p90 30 min · 291 flights
- Mondays82% on time · p90 20 min · 295 flights
- Saturdays82% on time · p90 20 min · 255 flights
- Sundays80% on time · p90 25 min · 285 flights
- Fridays79% on time · p90 35 min · 295 flights
- Wednesdays79% on time · p90 35 min · 250 flights
- Tuesdays78% on time · p90 25 min · 261 flights
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