Historical on-time performance
Seattle to Baltimore
2,335 miData through Dec 2025Source: US DOT · BTS
Flights on SEA–BWI arrive on time 75% of the time over the last 12 months.
On-time rate75%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights
based on 626 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- Alaska AirlinesOn-time76%Medianon timep9025 minCancel0.2%Flights534
- Southwest AirlinesOn-time71%Medianon timep9040 minCancel0.0%Flights92
Why flights run late
Delay causes
- Airline41%
- Weather0%
- Air traffic (NAS)24%
- Late aircraft35%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SEA → BWI
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 74% to 79% on time.
- Overnights79% on time · p90 30 min · 693 flights
- Mornings76% on time · p90 25 min · 771 flights
- Middays74% on time · p90 30 min · 308 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 69% to 85% on time.
- Tuesdays85% on time · p90 20 min · 233 flights
- Wednesdays81% on time · p90 25 min · 253 flights
- Saturdays78% on time · p90 30 min · 241 flights
- Fridays77% on time · p90 35 min · 260 flights
- Thursdays75% on time · p90 25 min · 261 flights
- Mondays74% on time · p90 30 min · 262 flights
- Sundays69% on time · p90 45 min · 262 flights
Advertisement
Keep exploring