Historical on-time performance
Baltimore to San Francisco
2,457 miData through May 2026Source: US DOT · BTS
Flights on BWI–SFO arrive on time 73% of the time over the last 12 months.
On-time rate73%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights
based on 1,059 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time79%Medianon timep9030 minCancel0.9%Flights752
- Southwest AirlinesOn-time61%Median5 minp9060 minCancel1.0%Flights307
Why flights run late
Delay causes
- Airline25%
- Weather8%
- Air traffic (NAS)33%
- Late aircraft35%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline40%
- Weather50%
- Air traffic (NAS)10%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 10 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 BWI → SFO
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 — 87% on time.
- Mornings87% on time · p90 15 min · 1,128 flights
- Middays74% on time · p90 40 min · 160 flights · limited
- Evenings68% on time · p90 50 min · 771 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 82% on time.
- Saturdays82% on time · p90 20 min · 294 flights
- Thursdays80% on time · p90 30 min · 334 flights
- Mondays78% on time · p90 35 min · 331 flights
- Tuesdays76% on time · p90 30 min · 280 flights
- Wednesdays76% on time · p90 40 min · 284 flights
- Sundays76% on time · p90 30 min · 325 flights
- Fridays75% on time · p90 40 min · 337 flights
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