Historical on-time performance
San Francisco to Baltimore
2,457 miData through May 2026Source: US DOT · BTS
Flights on SFO–BWI arrive on time 81% of the time over the last 12 months.
On-time rate81%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights
based on 1,058 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time86%Medianon timep9015 minCancel0.5%Flights751
- Southwest AirlinesOn-time68%Medianon timep9040 minCancel1.0%Flights307
Why flights run late
Delay causes
- Airline28%
- Weather1%
- Air traffic (NAS)13%
- Late aircraft57%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline14%
- Weather86%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 7 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 SFO → BWI
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 · 812 flights
- Overnights81% on time · p90 25 min · 1,336 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 81% to 87% on time.
- Saturdays87% on time · p90 20 min · 297 flights
- Tuesdays85% on time · p90 25 min · 261 flights
- Mondays84% on time · p90 20 min · 331 flights
- Wednesdays83% on time · p90 20 min · 303 flights
- Thursdays82% on time · p90 20 min · 336 flights
- Fridays81% on time · p90 25 min · 328 flights
- Sundays81% on time · p90 30 min · 329 flights
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