Historical on-time performance
Boston to Baltimore
369 miData through May 2026Source: US DOT · BTS
Flights on BOS–BWI arrive on time 76% of the time over the last 12 months.
On-time rate76%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled2.7%of scheduled flights
based on 3,560 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Republic AirwaysbestOn-time79%Medianon timep9040 minCancel3.2%Flights1,083
- Southwest AirlinesOn-time75%Medianon timep9050 minCancel2.4%Flights2,376
- Spirit AirlinesOn-time61%Medianon timep9090 minCancel5.0%Flights101
Why flights run late
Delay causes
- Airline24%
- Weather4%
- Air traffic (NAS)19%
- Late aircraft53%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline18%
- Weather53%
- Air traffic (NAS)30%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 97 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 BOS → 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 — 91% on time.
- Mornings91% on time · p90 10 min · 4,154 flights
- Middays86% on time · p90 20 min · 2,494 flights
- Afternoons73% on time · p90 50 min · 1,637 flights
- Evenings64% on time · p90 80 min · 2,391 flights
- Overnights56% on time · p90 100 min · 1,128 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 83% on time.
- Wednesdays83% on time · p90 25 min · 1,674 flights
- Tuesdays83% on time · p90 30 min · 1,696 flights
- Saturdays81% on time · p90 30 min · 1,311 flights
- Thursdays78% on time · p90 45 min · 1,802 flights
- Mondays76% on time · p90 50 min · 1,815 flights
- Fridays75% on time · p90 50 min · 1,826 flights
- Sundays73% on time · p90 55 min · 1,680 flights
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