Dallas (DAL) to St. Louis (STL): On-Time Performance
Data through July 2026
When you fly DAL to STL matters as much as anything else about the booking: the route swung from 90% on-time in December 2025 to just 54% in June 2026. Across the full period the route averages 79% on-time against a national 78%. Morning departures also hold up better than evening ones (89% vs 68%), which matters most in the rough months.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 1.5%
- Flights/day
- 5.3
- last 12 months
- Duration
- 1h 42m
- scheduled
- Distance
- 546 mi
Monthly on-time trend
Best time to fly from DAL to STL
Aim for departures around 6 a.m. (95% on-time); avoid 9 p.m. departures (53%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 12 min |
| Tuesdaybest | 86% | 10 min |
| Wednesday | 84% | 10 min |
| Thursday | 76% | 14 min |
| Friday | 76% | 16 min |
| Saturday | 80% | 13 min |
| Sunday | 72% | 18 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft60%
- Airline operations29%
- National airspace system8%
- Weather3%
Frequently asked questions
- How often are flights from DAL to STL delayed?
- 21% of DAL–STL flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 13 minutes.
- What is the best time of day to fly from DAL to STL?
- Departures around 6 a.m. have the best record (95% on-time), while departures around 9 p.m. have the worst (53%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from DAL to STL?
- The scheduled DAL–STL flight time averages 1h 42m over 546 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are DAL to STL flights cancelled?
- 1.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from DAL to STL?
- June 2026 was the roughest month in this dataset, with only 54% of arrivals on time. The best was December 2025 at 90%. If your dates are flexible, that 36-point gap is worth planning around.
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Based on 4,179 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.