Historical on-time performance
Seattle to Dallas
1,670 miData through May 2026Source: US DOT · BTS
Flights on SEA–DAL arrive on time 48% of the time over the last 12 months.
On-time rate48%arrived within 15 min
p90 delay65 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights
based on 188 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time48%Median15 minp9065 minCancel0.0%Flights188
Why flights run late
Delay causes
- Airline34%
- Weather0%
- Air traffic (NAS)29%
- Late aircraft36%
- Security1%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline67%
- Weather25%
- Air traffic (NAS)8%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 12 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 SEA → DAL
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 — 85% on time.
- Mornings85% on time · p90 20 min · 530 flights
- Middays64% on time · p90 50 min · 288 flights
- Afternoons39% on time · p90 75 min · 116 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 68% to 81% on time.
- Wednesdays81% on time · p90 30 min · 142 flights · limited
- Tuesdays76% on time · p90 35 min · 121 flights · limited
- Sundays74% on time · p90 40 min · 161 flights · limited
- Mondays73% on time · p90 30 min · 143 flights · limited
- Thursdays71% on time · p90 30 min · 142 flights · limited
- Fridays71% on time · p90 35 min · 144 flights · limited
- Saturdays68% on time · p90 50 min · 164 flights · limited
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