Best Time to Fly CLE to STL: On-Time Stats by Hour & Airline
Cleveland-Hopkins International → St Louis Lambert International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 82.9% of Cleveland (CLE) to St. Louis (STL) flights arrived on time (698 scheduled flights). That is 5.3 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 (91% on time) and December the worst month (73%).
The cancellation rate was 0.1% (US average 1.8%).
CLE 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 | 82.9% | 59 min | 0.1% | 698 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly CLE to STL
On-time arrival % by scheduled departure hour (local time), 1,402 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 1 | |
| 6am–7am | 93.5% | 0.0% | 93 |
| 7am–8am | 88.2% | 0.0% | 136 |
| 8am–9am | 93.7% | 1.3% | 306 |
| 9am–10am | 91.8% | 2.0% | 101 |
| 10am–11am | 93.5% | 3.1% | 32 |
| 11am–12pm | Limited data | 1 | |
| 12pm–1pm | 88.2% | 0.0% | 68 |
| 1pm–2pm | 92.3% | 0.0% | 39 |
| 2pm–3pm | 86.7% | 3.2% | 31 |
| 3pm–4pm | Limited data | 28 | |
| 4pm–5pm | Limited data | 13 | |
| 5pm–6pm | 93.3% | 0.0% | 75 |
| 6pm–7pm | 75.9% | 0.0% | 83 |
| 7pm–8pm | 78.1% | 0.0% | 146 |
| 8pm–9pm | 71.8% | 0.6% | 178 |
| 9pm–10pm | 60.0% | 1.4% | 71 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on CLE 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 | 24 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 71.7% | -14.9 pts | 0.0% | 53 |
| Summer peak (Jun 15 - Aug 15) | 80.7% | -5.8 pts | 0.0% | 249 |
| All other days | 86.6% | — | 1.0% | 1,076 |
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).