BOS to CHS flight delays
Boston, MA (BOS) Charleston, SC (CHS) · 818 miles
1,130 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
77.24%
Arrived on time
Within 15 minutes of schedule
1.77%
Cancelled
Share of scheduled flights
68 min
When late, late by
Average across delayed arrivals
16 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In May it ran 23.9 points more punctual than in December — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The two directions do not behave alike. CHS to BOS arrives on time 6 points less often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
The 2 airlines here are separated by under 3 points — close enough to call a tie. Choose on price and departure time.
The Boston to Charleston route sits close to the middle of the record — neither notably punctual nor notably late.
Which airline should you fly on this route?
Over January 2025 – August 2026, Delta Air Lines arrived on time most often on BOS to CHS. JetBlue Airways was late most often. Flights ran closest to schedule in May and worst in December.
Every airline on BOS to CHS
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| JetBlue Airways | 651 | 75.82% | 1.69% | 66 min | C |
| Delta Air Lines | 390 | 77.95% | 2.31% | 73 min | C |
| Republic Airways | 89 | 84.27% | 0% | 58 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
CHS to BOS Charleston back to Boston 71.27% on time DOther routes from Boston
Common questions
Are flights from Boston to Charleston usually delayed?
77.24% of flights on the BOS to CHS route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is about the same as the average route in this record.
Which airline is most on time from Boston to Charleston?
Delta Air Lines, at 77.95% on time across 390 flights. The least punctual on the route was JetBlue Airways at 75.82%.
How often are BOS to CHS flights cancelled?
1.77% of scheduled flights did not operate — about 18 in every thousand. That is in the normal range.
What is the best month to fly Boston to Charleston?
May, when 85.5% of flights arrived on time. The worst was December at 61.6%.
When BOS to CHS flights are late, how late are they?
About 68 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on BOS to CHS during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →