Historical on-time performance
Dallas to St. Louis
546 miData through May 2026Source: US DOT · BTS
Flights on DAL–STL arrive on time 77% of the time over the last 12 months.
On-time rate77%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled1.4%of scheduled flights
based on 1,913 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time77%Medianon timep9040 minCancel1.4%Flights1,913
Why flights run late
Delay causes
- Airline27%
- Weather3%
- Air traffic (NAS)8%
- Late aircraft62%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline19%
- Weather77%
- Air traffic (NAS)4%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 26 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 DAL → STL
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 — 92% on time.
- Mornings92% on time · p90 5 min · 1,869 flights
- Middays82% on time · p90 25 min · 1,236 flights
- Afternoons74% on time · p90 45 min · 814 flights
- Evenings72% on time · p90 50 min · 1,284 flights
- Overnights62% on time · p90 75 min · 915 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 84% on time.
- Tuesdays84% on time · p90 25 min · 904 flights
- Wednesdays83% on time · p90 30 min · 895 flights
- Saturdays82% on time · p90 30 min · 652 flights
- Fridays78% on time · p90 40 min · 919 flights
- Mondays78% on time · p90 30 min · 918 flights
- Thursdays75% on time · p90 45 min · 914 flights
- Sundays74% on time · p90 45 min · 916 flights
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