Best Time to Fly CHS to STL: On-Time Stats by Hour & Airline
Charleston AFB/International → St Louis Lambert International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 79.8% of Charleston (CHS) to St. Louis (STL) flights arrived on time (159 scheduled flights). That is 2.1 points above the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
April has been the best month (94% on time) and Thursday the weakest day of the week (69%).
0.6% of flights were cancelled, versus 1.8% nationally.
CHS 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 | 79.8% | 69 min | 0.6% | 159 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly CHS to STL
On-time arrival % by scheduled departure hour (local time), 297 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 10am–11am | Limited data | 13 | |
| 11am–12pm | 94.3% | 0.0% | 35 |
| 12pm–1pm | Limited data | 5 | |
| 1pm–2pm | 76.2% | 0.0% | 42 |
| 2pm–3pm | 80.8% | 2.1% | 48 |
| 3pm–4pm | Limited data | 24 | |
| 4pm–5pm | 63.9% | 0.0% | 61 |
| 5pm–6pm | 80.8% | 0.0% | 52 |
| 6pm–7pm | Limited data | 1 | |
| 7pm–8pm | Limited data | 16 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on CHS to STL
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Summer peak (Jun 15 - Aug 15) | 72.9% | -9.6 pts | 0.0% | 107 |
| All other days | 82.5% | — | 0.5% | 190 |
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).