Charleston (CHS) to Boston (BOS): On-Time Performance
Data through May 2026
Charleston (CHS) to Boston (BOS) effectively runs on two schedules. In October 2024, 92% of arrivals were on time; in September 2025 that fell to 51% — a 41-point seasonal swing. Across the full period the route averages 73% on-time against a national 78%. Morning departures also hold up better than evening ones (86% vs 67%), which matters most in the rough months.
- On-time
- 73%
- arrived <15 min late
- Avg delay
- 24 min
- completed flights
- Cancelled
- 2.1%
- Flights/day
- 3.1
- last 12 months
- Duration
- 2h 23m
- scheduled
- Distance
- 818 mi
Best airline from CHS to BOS
4 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 82% | 19 min | 0.7% | 147 |
| Spirit Airlines | 73% | 20 min | 3.2% | 158 |
| JetBlue Airways | 72% | 21 min | 1.8% | 1,359 |
| Delta Air Lines | 71% | 32 min | 2.6% | 773 |
Monthly on-time trend
Best time to fly from CHS to BOS
Aim for departures around 6 a.m. (92% on-time); avoid 1 p.m. departures (62%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 72% | 31 min |
| Tuesday | 78% | 19 min |
| Wednesdaybest | 79% | 19 min |
| Thursday | 70% | 27 min |
| Friday | 67% | 25 min |
| Saturday | 77% | 21 min |
| Sunday | 67% | 28 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft38%
- Airline operations31%
- National airspace system28%
- Weather3%
Frequently asked questions
- How often are flights from CHS to BOS delayed?
- 27% of CHS–BOS flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 24 minutes.
- Which airline is most reliable from CHS to BOS?
- Republic Airways has the best on-time record on this route at 82%, based on 147 flights. 4 airlines flew CHS–BOS frequently enough to compare in this period.
- What is the best time of day to fly from CHS to BOS?
- Departures around 6 a.m. have the best record (92% on-time), while departures around 1 p.m. have the worst (62%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from CHS to BOS?
- The scheduled CHS–BOS flight time averages 2h 23m over 818 miles. Actual arrival times vary — flights on this route land 15+ minutes late 27% of the time.
- How often are CHS to BOS flights cancelled?
- 2.1% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What is the worst month to fly from CHS to BOS?
- September 2025 was the roughest month in this dataset, with only 51% of arrivals on time. The best was October 2024 at 92%. If your dates are flexible, that 41-point gap is worth planning around.
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Based on 2,437 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.