Best Time to Fly STL to DAL: On-Time Stats by Hour & Airline
St Louis Lambert International → Dallas Love Field
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 75.9% of St. Louis (STL) to Dallas (DAL) flights arrived on time (1,952 scheduled flights). That is 1.8 points below the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
January has been the best month (88% on time) and Sunday the weakest day of the week (72%).
1.5% of flights were cancelled, versus 1.8% nationally.
STL to DAL on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlines | 75.9% | 61 min | 1.5% | 1,952 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly STL to DAL
On-time arrival % by scheduled departure hour (local time), 4,020 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 93.2% | 2.0% | 395 |
| 6am–7am | 93.5% | 1.6% | 189 |
| 7am–8am | 93.1% | 2.8% | 253 |
| 8am–9am | 87.7% | 1.3% | 381 |
| 9am–10am | 89.3% | 2.9% | 136 |
| 10am–11am | 84.7% | 2.4% | 168 |
| 11am–12pm | 82.9% | 1.1% | 179 |
| 12pm–1pm | 84.9% | 2.7% | 259 |
| 1pm–2pm | 80.0% | 1.0% | 102 |
| 2pm–3pm | 75.3% | 1.7% | 409 |
| 3pm–4pm | 64.5% | 0.9% | 226 |
| 4pm–5pm | 69.3% | 1.3% | 152 |
| 5pm–6pm | 64.1% | 2.7% | 149 |
| 6pm–7pm | 68.1% | 1.1% | 282 |
| 7pm–8pm | 68.4% | 2.6% | 195 |
| 8pm–9pm | 69.7% | 0.9% | 231 |
| 9pm–10pm | 65.5% | 1.0% | 314 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on STL to DAL
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 72.7% | -8.3 pts | 1.3% | 78 |
| Christmas & New Year (Dec 20 - Jan 3) | 76.5% | -4.5 pts | 1.2% | 165 |
| Summer peak (Jun 15 - Aug 15) | 70.9% | -10.2 pts | 0.7% | 699 |
| All other days | 81.1% | — | 2.0% | 3,078 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).