Historical on-time performance
St. Louis to Dallas
546 miData through May 2026Source: US DOT · BTS
Flights on STL–DAL arrive on time 76% of the time over the last 12 months.
On-time rate76%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled1.6%of scheduled flights
based on 1,916 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time76%Medianon timep9040 minCancel1.6%Flights1,916
Why flights run late
Delay causes
- Airline32%
- Weather5%
- Air traffic (NAS)19%
- Late aircraft44%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline27%
- Weather73%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 30 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 STL → 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 — 90% on time.
- Mornings90% on time · p90 10 min · 2,009 flights
- Middays81% on time · p90 25 min · 1,133 flights
- Afternoons69% on time · p90 45 min · 1,166 flights
- Evenings68% on time · p90 55 min · 1,023 flights
- Overnights65% on time · p90 75 min · 797 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 82% on time.
- Tuesdays82% on time · p90 30 min · 903 flights
- Wednesdays82% on time · p90 30 min · 904 flights
- Fridays79% on time · p90 30 min · 928 flights
- Thursdays77% on time · p90 30 min · 918 flights
- Saturdays75% on time · p90 40 min · 642 flights
- Mondays75% on time · p90 40 min · 923 flights
- Sundays70% on time · p90 50 min · 910 flights
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