Route reliability record
CHS→JFK
Charleston to New York
- Flights
- 789
- Period
- September 2025 to August 2026
- Distance
- 636 mi
- Carriers
- 3
This route carries a cancellation problem, not just a delay problem: 6.5% of scheduled flights never operate, against 1.9% nationally. Of the ones that do fly, close to three flights in four arrive on time, worth a C− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 789 CHS to JFK flights, with a median arrival 5 minutes early.
Best time to fly CHS to JFK: a 5am–8am departure, ideally on a Tuesday. Flights in that window arrived on time 84.4% of the time and Tuesday flights 78.7%, against 73.5% for the route overall.
The US average over the same twelve months is 77.3%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
73.5%
Arrivals under 15 minutes late, of 737 completed flights
Avg delay
84 min
Across delayed arrivals only, not all flights
Cancelled
6.46%
National rate is 1.89%
Best carrier
JetBlue
72.5% on time across 637 flights
These figures cover 789 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
Which airline is most reliable on CHS to JFK
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 |
|---|---|---|---|---|---|
| Delta Air Linesthin sample | 2 | 100.0% | — | 0.00% | A+ |
| Republic Airwaysthin sample | 150 | 77.9% | 71 min | 9.33% | B− |
| JetBlue Airways | 637 | 72.5% | 87 min | 5.81% | C− |
Flight by flight
Flights on CHS to JFK
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
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.
Best ways to make this trip
The most reliable ways to fly Charleston to New York
Every airline on this route and on the routes between nearby airports, ranked by how often a scheduled flight actually operated and arrived on time. 3 of the top 4 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. CHS → EWRCharleston to Newark | United Airlines | 80.1% | 82.2% | 2.60% | 5am–8am, Sat | UA 1289 06:00 |
| 2. CHS → LGACharleston to New York | Republic Airways | 72.4% | 77.8% | 6.88% | 8am–11am, Sat | — |
| 3. CHS → JFKCharleston to New York | JetBlue Airways | 68.3% | 72.5% | 5.81% | 5am–8am, Fri | B6 2474 11:10 |
| 4. CHS → LGACharleston to New York | Delta Air Lines | 62.2% | 65.9% | 5.57% | 11am–2pm, Sat | — |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 35 points, against half a point between the best and worst carrier.
- 5am–8am100 flights84.4%
- 8am–11am95 flights84.4%
- 11am–2pm299 flights74.6%
- 2pm–5pm49 flights78.7%
- 5pm–8pm129 flights72.7%
- 8pm–5am117 flights49.0%
Scale runs 40% to 90%.
The 8pm–5am window is where this operation falls apart: 49.0% on time, against 84.4% 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 299 flights scheduled in it.
Explore
Filter CHS to JFK by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On CHS to JFK, the best departure window is 5am–8am at 84.4% on time and the worst is 8pm–5am at 49.0%, a wide gap of 35.4 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am84.4%
- 8–11am84.4%
- 11am–2pm74.6%
- 2–5pm78.7%
- 5–8pm72.7%
- 8pm–5am49.0%
best all US flightsScale 40% to 95%.
Across the year
When delays peak on this route
This route's year swings by 36 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
July is the worst month at 56.2% on time, 36 points below September, the best at 91.7%. 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. January was the busiest month here, with 83 flights.
Across the week, Tuesday is the strongest day at 78.7% on time and Sunday the weakest at 63.2%, a spread of 16 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 46% of the 16,000 delay minutes carriers reported here, and the remaining four split what is left.
- 46%Late-arriving aircraft
- 33%Carrier
- 20%National Airspace System
- 1%Extreme weather
46% 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 34 to one. The split is drawn from 16,418 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 84.4% on time here.
Cancellations run at 6.46%, against 1.89% nationally. That is about one flight in fifteen 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 actually 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 636 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 runs 74.3% on time across 791 flights, within about a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 789 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.
Work out the risk of missing a connection in JFK after this flight
What to do with this
Booking this route
Put together: the delay figures matter less here than the 6.46% cancellation rate. A late arrival costs you an hour and a half; 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. 737 completed flights over 12 months sit behind that.
Common questions
CHS to JFK questions
How often is CHS to JFK delayed?
About one flight in four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 26.5% of the 789 flights in this analysis, against 22.7% nationally. Delayed flights are late by an hour and a half on average.
How reliable is CHS to JFK compared with the rest of the country?
73.5% of flights arrive on time here against a national 77.3%, a difference of 4 points against it. That is worth a C− on this site's grading scale.
What time of day has the fewest delays on CHS to JFK?
The 5am–8am departure window is the strongest at 84.4% on time. The 8pm–5am window is the weakest at 49.0%, 35 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are July delays on CHS to JFK?
July is the weakest month at 56.2% on time, compared with 91.7% in September. Across the year that is 36 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- JFK to CHS — the return legseparate record
- Charleston International (CHS) delay statistics
- John F. Kennedy International (JFK) delay statistics
- Republic Airways on CHS to JFK77.9%
- JetBlue Airways on CHS to JFK72.5%
- CHS to ATL, a related route88.9%
- LAX to JFK, a related route77.5%
- CHS to CLT, a related route82.7%
- Delta Air Lines on-time record100.0%
- Republic Airways on-time record77.9%
- JetBlue Airways on-time record72.5%
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Direction matters. CHS to JFK and JFK to CHS are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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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.