Charleston (CHS) to Boston (BOS): On-Time Performance
Data through July 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 72% on-time against a national 78%. Morning departures also hold up better than evening ones (87% vs 65%), which matters most in the rough months.
- On-time
- 72%
- arrived <15 min late
- Avg delay
- 27 min
- completed flights
- Cancelled
- 2.4%
- 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 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 82% | 18 min | 1.2% | 164 |
| Spirit Airlines | 73% | 20 min | 3.9% | 128 |
| JetBlue Airways | 72% | 23 min | 2.1% | 1,417 |
| Delta Air Lines | 70% | 36 min | 2.9% | 799 |
Monthly on-time trend
Best time to fly from CHS to BOS
Aim for departures around 6 a.m. (92% on-time); avoid 5 p.m. departures (57%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 70% | 33 min |
| Tuesday | 75% | 21 min |
| Wednesdaybest | 77% | 24 min |
| Thursday | 68% | 29 min |
| Friday | 69% | 26 min |
| Saturdaybest | 77% | 24 min |
| Sunday | 68% | 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 aircraft35%
- Airline operations34%
- National airspace system27%
- Weather3%
Frequently asked questions
- How often are flights from CHS to BOS delayed?
- 28% of CHS–BOS 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 27 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 164 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 5 p.m. have the worst (57%). 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 28% of the time.
- How often are CHS to BOS flights cancelled?
- 2.4% 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 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 2,508 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.