Best Time to Fly OKC to STL: On-Time Stats by Hour & Airline
Okc Will Rogers International → St Louis Lambert International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 90.2% of Oklahoma City (OKC) to St. Louis (STL) flights arrived on time (411 scheduled flights). That is 12.5 points above the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (93% on time) and April the worst month (73%).
The cancellation rate was 1.2% (US average 1.8%).
OKC to STL 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 | 90.1% | 50 min | 1.2% | 410 |
| Envoy Air | Limited data | 1 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly OKC to STL
On-time arrival % by scheduled departure hour (local time), 1,105 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 95.5% | 0.9% | 316 |
| 6am–7am | 95.0% | 1.4% | 221 |
| 7am–8am | Limited data | 2 | |
| 8am–9am | 97.2% | 2.7% | 37 |
| 9am–10am | Limited data | 5 | |
| 11am–12pm | Limited data | 1 | |
| 12pm–1pm | Limited data | 3 | |
| 1pm–2pm | Limited data | 1 | |
| 2pm–3pm | Limited data | 1 | |
| 3pm–4pm | 92.3% | 1.9% | 106 |
| 4pm–5pm | 87.9% | 0.8% | 125 |
| 5pm–6pm | 72.4% | 0.0% | 134 |
| 6pm–7pm | 75.5% | 1.3% | 153 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on OKC to STL
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) | Limited data | 28 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 91.7% | +1.8 pts | 0.0% | 60 |
| Summer peak (Jun 15 - Aug 15) | 81.9% | -8.0 pts | 1.3% | 151 |
| All other days | 89.8% | — | 1.0% | 866 |
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).