Carrier route record
B6BOS→CHS
JetBlue Airways · Boston to Charleston
- Flights
- 670
- Period
- September 2025 to August 2026
- Share of route
- 58%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with JetBlue Airways.
JetBlue on BOS to CHS sits in the middle of the pack with a B. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 670 flights, with a median arrival 5 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate JetBlue on BOS to CHS from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
75.3%
Arrivals under 15 minutes late, of 651 completed flights
Avg delay
71 min
Across delayed arrivals only, not all flights
Cancelled
2.54%
National rate is 1.89%
Whole route
76.5%
Every carrier on BOS to CHS, 1,149 flights
These figures cover 670 flights between September 2025 and August 2026. Beyond the headline rate, 11.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
JetBlue against every carrier on BOS to CHS
JetBlue flew 670 of the 1,149 flights on BOS to CHS, most of the route. Its 75.3% on time is about level with the route as a whole at 76.5%. Ranked by on-time rate it is last of three carriers on the route, where the range runs from Republic at 85.0% to JetBlue at 75.3%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Republic Airwaysthin sample | 109 | 85.0% | 54 min | 1.83% | A |
| Delta Air Lines | 370 | 76.2% | 71 min | 3.24% | B− |
| JetBlue Airways (this page) | 670 | 75.3% | 71 min | 2.54% | B |
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When JetBlue runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 25 points, against half a point between the best and worst carrier.
- 5am–8am141 flights83.9%
- 8am–11am217 flights79.2%
- 11am–2pm78 flights83.3%
- 2pm–5pm161 flights65.6%
- 5pm–8pm73 flights58.6%
- 8pm–5am—
Scale runs 50% to 90%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 58.6% on time, against 83.9% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 8am–11am window is the busiest, with 217 flights scheduled in it.
Across the year
JetBlue on BOS to CHS through the year
December is the weak month at 58.1% on time, against 86.7% in October. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. May was the busiest month here, with 84 flights.
Across the week, Tuesday is the strongest day at 82.9% on time and Sunday the weakest at 71.4%, a spread of 12 points.
Arrival by arrival
How late JetBlue on BOS to CHS runs when it is late
JetBlue on BOS to CHS often beats the schedule: 209 of 651 completed flights, 32%, arrived 15 minutes or more early. The 161 late arrivals split 49 under half an hour, 40 between 30 and 60 minutes, and 72 an hour or more.
- 15+ min early209 flights32.1%
- Within 15 min281 flights43.2%
- 15–29 min late49 flights7.5%
- 30–59 min late40 flights6.1%
- 1–2 hours late47 flights7.2%
- 2+ hours late25 flights3.8%
Scale runs 0% to 100%.
Share of 651 completed flights by arrival against schedule.
26 of 147 late departures made up the time and arrived on time, 18% of them. In the other direction, 40 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at CHS.
The worst days
Worst days for JetBlue on BOS to CHS
The latest arrival of the period was on 6 September 2025, 6 hours 15 minutes behind schedule; most of its delay minutes were filed as extreme weather. On four of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 6 September 2025 | 6 hours 15 minutes | Extreme weather |
| 19 December 2025 | 4 hours 56 minutes | Late-arriving aircraft |
| 3 August 2026 | 4 hours 50 minutes | Late-arriving aircraft |
| 19 January 2026 | 4 hours 32 minutes | Late-arriving aircraft |
| 14 December 2025 | 4 hours 8 minutes | Late-arriving aircraft |
Delay causes
Why JetBlue runs late on this route
Late-arriving aircraft accounts for 44% of the 11,000 delay minutes carriers reported here, and the remaining four split what is left.
- 44%Late-arriving aircraft
- 28%Carrier
- 24%National Airspace System
- 3%Extreme weather
44% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 11,000 reported delay minutes here, that single category outweighs weather by 13 to one. The split is drawn from 11,415 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 83.9% on time here.
Cancellations run at 2.54%, against 1.89% nationally. That is about one flight in 40 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
11.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 818 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg is a different operation and performs like one: it runs 69.4% on time across 670 flights, 6 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 6 points of difference.
One caution: this is a thin sample. 670 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking JetBlue on BOS to CHS
Put together: treat all of this as provisional. 670 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 75.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 651 completed flights over 12 months sit behind that.
Related
Where to go next
- BOS to CHS, every carrier
- JetBlue on CHS to BOS, the return leg
- Republic Airways on BOS to CHS85.0%
- Delta Air Lines on BOS to CHS76.2%
- JetBlue Airways network-wide record
- Boston Logan International (BOS) delay statistics
- Charleston International (CHS) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.