Historical on-time performance
Dallas to St. Louis
546 miData through Dec 2025Source: US DOT · BTS
Flights on DAL–STL arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled2.0%of scheduled flights
based on 1,987 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time79%Medianon timep9035 minCancel2.0%Flights1,987
Why flights run late
Delay causes
- Airline32%
- Weather2%
- Air traffic (NAS)10%
- Late aircraft56%
- Security0%
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 DAL → STL
All airlines · rolling 36 months (2023-01 .. 2025-12).
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 · 1,969 flights
- Middays82% on time · p90 25 min · 1,142 flights
- Afternoons75% on time · p90 40 min · 805 flights
- Evenings71% on time · p90 50 min · 1,224 flights
- Overnights65% on time · p90 60 min · 1,047 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 84% on time.
- Saturdays84% on time · p90 25 min · 650 flights
- Tuesdays84% on time · p90 25 min · 928 flights
- Wednesdays82% on time · p90 25 min · 918 flights
- Mondays79% on time · p90 30 min · 929 flights
- Fridays78% on time · p90 35 min · 924 flights
- Sundays75% on time · p90 40 min · 923 flights
- Thursdays75% on time · p90 45 min · 915 flights
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