Best Time to Fly BWI to CHS: On-Time Stats by Hour & Airline
Baltimore/Washington International Thurgood Marshall → Charleston AFB/International
Data through July 2026 · Last updated October 18, 2026
1,234 flights were scheduled from Baltimore (BWI) to Charleston (CHS) in the last 12 months, and 80.2% of those that flew arrived on time, 2.6 points above the US 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 (85% on time) and July the worst month (67%).
The cancellation rate was 1.6% (US average 1.8%).
BWI to CHS 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 | 80.1% | 54 min | 1.6% | 1,230 |
| Spirit Airlines | Limited data | 4 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BWI to CHS
On-time arrival % by scheduled departure hour (local time), 2,511 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | Limited data | 10 | |
| 8am–9am | 87.7% | 1.2% | 650 |
| 9am–10am | 88.8% | 0.0% | 80 |
| 10am–11am | Limited data | 1 | |
| 11am–12pm | 81.1% | 0.4% | 228 |
| 12pm–1pm | 80.4% | 0.0% | 102 |
| 1pm–2pm | 88.1% | 1.6% | 128 |
| 2pm–3pm | 82.8% | 0.0% | 93 |
| 3pm–4pm | 77.0% | 1.8% | 164 |
| 4pm–5pm | 78.0% | 0.0% | 91 |
| 5pm–6pm | 68.4% | 1.6% | 252 |
| 6pm–7pm | 76.2% | 2.9% | 242 |
| 7pm–8pm | 73.5% | 1.7% | 173 |
| 8pm–9pm | 63.6% | 4.2% | 259 |
| 9pm–10pm | 54.5% | 0.0% | 33 |
| 10pm–11pm | Limited data | 5 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BWI to CHS
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) | 70.2% | -11.5 pts | 0.0% | 47 |
| Christmas & New Year (Dec 20 - Jan 3) | 69.2% | -12.5 pts | 2.1% | 97 |
| Summer peak (Jun 15 - Aug 15) | 68.5% | -13.2 pts | 3.8% | 453 |
| All other days | 81.7% | — | 1.0% | 1,914 |
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).