Historical on-time performance
Baltimore to Seattle
Flights on BWI–SEA arrive on time 67% of the time over the last 12 months.
based on 663 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.
- Southwest AirlinesOn-time72%Medianon timep9055 minCancel0.0%Flights92
- Alaska AirlinesOn-time66%Medianon timep9045 minCancel0.9%Flights571
Why flights run late
Delay causes
- Airline17%
- Weather9%
- Air traffic (NAS)37%
- Late aircraft35%
- Security1%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline80%
- Weather20%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 5 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 → SEA
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 — 77% on time.
- Mornings77% on time · p90 40 min · 690 flights
- Evenings62% on time · p90 45 min · 1,059 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 61% to 73% on time.
- Tuesdays73% on time · p90 35 min · 238 flights
- Wednesdays70% on time · p90 45 min · 253 flights
- Thursdays68% on time · p90 40 min · 268 flights
- Saturdays68% on time · p90 45 min · 246 flights
- Sundays68% on time · p90 55 min · 270 flights
- Mondays66% on time · p90 45 min · 267 flights
- Fridays61% on time · p90 50 min · 269 flights
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