Boston (BOS) to Charleston (CHS): On-Time Performance
Data through July 2026
Boston (BOS) to Charleston (CHS) effectively runs on two schedules. In May 2026, 86% of arrivals were on time; in December 2025 that fell to 62% — a 24-point seasonal swing. Across the full period the route averages 76% on-time against a national 78%. Morning departures also hold up better than evening ones (81% vs 60%), which matters most in the rough months.
- On-time
- 76%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 2.1%
- Flights/day
- 3.1
- last 12 months
- Duration
- 2h 35m
- scheduled
- Distance
- 818 mi
Best airline from BOS to CHS
4 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 84% | 10 min | 0.6% | 163 |
| Delta Air Lines | 79% | 15 min | 2.6% | 799 |
| JetBlue Airways | 73% | 18 min | 1.8% | 1,416 |
| Spirit Airlines | 72% | 19 min | 3.1% | 128 |
Monthly on-time trend
Best time to fly from BOS to CHS
Aim for departures around 6 a.m. (90% on-time); avoid 5 p.m. departures (55%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 17 min |
| Tuesday | 81% | 13 min |
| Wednesdaybest | 82% | 11 min |
| Thursday | 70% | 21 min |
| Friday | 72% | 20 min |
| Saturday | 76% | 18 min |
| Sunday | 74% | 16 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft36%
- Airline operations36%
- National airspace system26%
- Weather3%
Frequently asked questions
- How often are flights from BOS to CHS delayed?
- 25% of BOS–CHS flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 17 minutes.
- Which airline is most reliable from BOS to CHS?
- Republic Airways has the best on-time record on this route at 84%, based on 163 flights. 4 airlines flew BOS–CHS frequently enough to compare in this period.
- What is the best time of day to fly from BOS to CHS?
- Departures around 6 a.m. have the best record (90% on-time), while departures around 5 p.m. have the worst (55%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BOS to CHS?
- The scheduled BOS–CHS flight time averages 2h 35m over 818 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are BOS to CHS flights cancelled?
- 2.1% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from BOS to CHS?
- December 2025 was the roughest month in this dataset, with only 62% of arrivals on time. The best was May 2026 at 86%. If your dates are flexible, that 24-point gap is worth planning around.
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Based on 2,506 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.