Best Time to Fly STL to CLE: On-Time Stats by Hour & Airline
St Louis Lambert International → Cleveland-Hopkins International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 82.2% of St. Louis (STL) to Cleveland (CLE) flights arrived on time (698 scheduled flights). That is 4.6 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 (89% on time) and July the worst month (73%).
The cancellation rate was 0.3% (US average 1.8%).
STL to CLE 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 | 82.2% | 55 min | 0.3% | 698 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly STL to CLE
On-time arrival % by scheduled departure hour (local time), 1,400 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 92.1% | 0.0% | 191 |
| 8am–9am | 92.8% | 0.8% | 239 |
| 9am–10am | 94.6% | 3.5% | 58 |
| 10am–11am | 88.2% | 0.0% | 85 |
| 11am–12pm | 97.1% | 0.0% | 34 |
| 12pm–1pm | 67.7% | 0.0% | 31 |
| 1pm–2pm | 89.7% | 0.0% | 39 |
| 2pm–3pm | 87.7% | 0.0% | 65 |
| 3pm–4pm | Limited data | 14 | |
| 4pm–5pm | Limited data | 6 | |
| 5pm–6pm | 85.7% | 0.0% | 36 |
| 6pm–7pm | 82.2% | 0.5% | 204 |
| 7pm–8pm | 71.0% | 0.0% | 162 |
| 8pm–9pm | 67.4% | 0.5% | 219 |
| 9pm–10pm | Limited data | 17 | |
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 CLE
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 | 24 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 81.1% | -3.5 pts | 0.0% | 53 |
| Summer peak (Jun 15 - Aug 15) | 75.5% | -9.1 pts | 0.0% | 249 |
| All other days | 84.6% | — | 0.6% | 1,074 |
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).