Historical on-time performance
Seattle to Dallas
1,670 miData through Dec 2025Source: US DOT · BTS
Flights on SEA–DAL arrive on time 51% of the time over the last 12 months.
On-time rate51%arrived within 15 min
p90 delay55 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights
based on 127 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time51%Median10 minp9055 minCancel0.0%Flights127
Why flights run late
Delay causes
- Airline33%
- Weather0%
- Air traffic (NAS)17%
- Late aircraft49%
- Security1%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SEA → DAL
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 69% to 84% on time.
- Mornings84% on time · p90 20 min · 544 flights
- Evenings82% on time · p90 25 min · 83 flights · limited
- Middays69% on time · p90 45 min · 400 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 83% on time.
- Wednesdays83% on time · p90 25 min · 152 flights · limited
- Tuesdays81% on time · p90 20 min · 131 flights · limited
- Sundays77% on time · p90 30 min · 170 flights · limited
- Thursdays76% on time · p90 30 min · 150 flights · limited
- Mondays76% on time · p90 30 min · 153 flights · limited
- Fridays74% on time · p90 30 min · 152 flights · limited
- Saturdays70% on time · p90 50 min · 163 flights · limited
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