St. Louis (STL) to Dallas (DAL): On-Time Performance
Data through May 2026
St. Louis (STL) to Dallas (DAL) effectively runs on two schedules. In October 2024, 93% of arrivals were on time; in June 2025 that fell to 69% — a 24-point seasonal swing. Across the full period the route averages 80% on-time against a national 78%. Morning departures also hold up better than evening ones (90% vs 70%), which matters most in the rough months.
- On-time
- 80%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 1.7%
- Flights/day
- 5.2
- last 12 months
- Duration
- 1h 45m
- scheduled
- Distance
- 546 mi
Monthly on-time trend
Best time to fly from STL to DAL
Aim for departures around 6 a.m. (95% on-time); avoid 3 p.m. departures (64%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 15 min |
| Tuesday | 84% | 11 min |
| Wednesdaybest | 85% | 10 min |
| Thursday | 80% | 11 min |
| Friday | 81% | 11 min |
| Saturday | 77% | 12 min |
| Sunday | 73% | 20 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft46%
- Airline operations29%
- National airspace system20%
- Weather5%
Frequently asked questions
- How often are flights from STL to DAL delayed?
- 20% of STL–DAL flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 13 minutes.
- What is the best time of day to fly from STL to DAL?
- Departures around 6 a.m. have the best record (95% on-time), while departures around 3 p.m. have the worst (64%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from STL to DAL?
- The scheduled STL–DAL flight time averages 1h 45m over 546 miles. Actual arrival times vary — flights on this route land 15+ minutes late 20% of the time.
- How often are STL to DAL flights cancelled?
- 1.7% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What is the worst month to fly from STL to DAL?
- June 2025 was the roughest month in this dataset, with only 69% of arrivals on time. The best was October 2024 at 93%. If your dates are flexible, that 24-point gap is worth planning around.
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Based on 4,004 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.