Carrier route record
B6CHS→BOS
JetBlue Airways · Charleston to Boston
- 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 CHS to BOS sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 8 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 national on-time rate over the same period is 77.3%, so JetBlue on CHS to BOS runs 8 points behind the country as a whole. Across a thousand flights that is about 79 extra late arrivals.
Key figures
On time
69.4%
Arrivals under 15 minutes late, of 650 completed flights
Avg delay
81 min
Across delayed arrivals only, not all flights
Cancelled
2.84%
National rate is 1.89%
Whole route
69.5%
Every carrier on CHS to BOS, 1,150 flights
These figures cover 670 flights between September 2025 and August 2026. Beyond the headline rate, 15.1% 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 CHS to BOS
JetBlue flew 670 of the 1,150 flights on CHS to BOS, most of the route. Its 69.4% on time is about level with the route as a whole at 69.5%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Republic at 84.1% to Delta at 65.4%. 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 | 110 | 84.1% | 88 min | 2.73% | B |
| JetBlue Airways (this page) | 670 | 69.4% | 81 min | 2.84% | C |
| Delta Air Lines | 370 | 65.4% | 112 min | 3.78% | C− |
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 32 points, against half a point between the best and worst carrier.
- 5am–8am58 flights91.4%
- 8am–11am131 flights87.6%
- 11am–2pm225 flights62.7%
- 2pm–5pm72 flights59.7%
- 5pm–8pm141 flights59.4%
- 8pm–5am43 flights65.9%
Scale runs 50% to 95%.
The 5pm–8pm window is where this operation falls apart: 59.4% on time, against 91.4% 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 11am–2pm window is the busiest, with 225 flights scheduled in it.
Across the year
JetBlue on CHS to BOS through the year
July is the worst month at 51.8% on time, 32 points below March, the best at 84.0%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. May was the busiest month here, with 85 flights.
Across the week, Saturday is the strongest day at 79.5% on time and Sunday the weakest at 60.0%, a spread of 20 points.
Arrival by arrival
How late JetBlue on CHS to BOS runs when it is late
The 199 late arrivals split 42 under half an hour, 59 between 30 and 60 minutes, and 98 an hour or more.
- 15+ min early159 flights24.5%
- Within 15 min292 flights44.9%
- 15–29 min late42 flights6.5%
- 30–59 min late59 flights9.1%
- 1–2 hours late66 flights10.2%
- 2+ hours late32 flights4.9%
Scale runs 0% to 100%.
Share of 650 completed flights by arrival against schedule.
30 of 214 late departures made up the time and arrived on time, 14% of them. 15 flights left on time and still arrived late.
The worst days
Worst days for JetBlue on CHS to BOS
The latest arrival of the period was on 10 June 2026, 15 hours 40 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 10 June 2026 | 15 hours 40 minutes | Carrier |
| 27 January 2026 | 6 hours 26 minutes | Carrier |
| 13 October 2025 | 6 hours 7 minutes | Carrier |
| 21 July 2026 | 5 hours 14 minutes | National Airspace System |
| 19 January 2026 | 4 hours 47 minutes | Late-arriving aircraft |
Delay causes
Why JetBlue runs late on this route
Late-arriving aircraft accounts for 45% of the 16,000 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Late-arriving aircraft
- 32%National Airspace System
- 22%Carrier
- 0%Extreme weather
45% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 16,000 reported delay minutes here, that single category outweighs weather by 45 to one. The split is drawn from 16,190 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 91.4% on time here.
Cancellations run at 2.84%, against 1.89% nationally. That is roughly 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
15.1% 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 75.3% on time across 670 flights, 6 points above 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 CHS to BOS
Put together: the delay figures matter less here than the 2.84% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 650 completed flights over 12 months sit behind that.
Related
Where to go next
- CHS to BOS, every carrier
- JetBlue on BOS to CHS, the return leg
- Republic Airways on CHS to BOS84.1%
- Delta Air Lines on CHS to BOS65.4%
- JetBlue Airways network-wide record
- Charleston International (CHS) delay statistics
- Boston Logan International (BOS) 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.