STL (St. Louis) to DAL (Dallas) flights arrive on time 80% of the time. The most reliable airline on this route is Southwest Airlines at 80%. The average delay is 58 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated May 2026.STL → DAL
STL (St. Louis) to DAL (Dallas)
STL → DAL on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
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This route is on time most of the time. About 80% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Accurate?
Good to know
Departing from STL
81% on timeTSA is currently ~24 min. Best time: 4 AM (about 5 min).
Arriving at DAL
78% on timeWhen flights into DAL are late, the average delay is 55 minutes. Build buffer if you have ground plans.
If connecting at DAL: TSA is ~21 min right now. Allow at least 60 minutes for a domestic connection.
DAL has a 2.1% cancellation rate — keep the airline app handy for rebooking.
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Data last updated May 2026. Source: Bureau of Transportation Statistics.