Route reliability record
BOS→CLT
Boston to Charlotte
- Flights
- 4,009
- Period
- September 2025 to August 2026
- Distance
- 728 mi
- Carriers
- 4
This route lands a B, 5 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 4,009 BOS to CLT flights, of which American Airlines flew 2,728 at 83.3% on time.
Best time to fly BOS to CLT: a 5am–8am departure, ideally on a Wednesday. Flights in that window arrived on time 93.7% of the time and Wednesday flights 85.7%, against 82.0% for the route overall.
Set against the rest of the country, this route's record is 5 points better than the US average of 77.3%. That gap is worth roughly 47 fewer late arrivals for every thousand flights.
Key figures
On time
82.0%
Arrivals under 15 minutes late, of 3,897 completed flights
Avg delay
81 min
Across delayed arrivals only, not all flights
Cancelled
2.64%
National rate is 1.89%
Best carrier
American
83.3% on time across 2,728 flights
These figures cover 4,009 flights between September 2025 and August 2026. The median arrival is 13 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
Which airline is most reliable on BOS to CLT
The two carriers here are closely matched: 4 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Airthin sample | 5 | 100.0% | — | 20.00% | A− |
| American Airlines | 2,728 | 83.3% | 88 min | 2.20% | B |
| Republic Airways | 1,214 | 79.7% | 68 min | 3.54% | B− |
| Spirit Airlinesthin sample | 62 | 66.7% | 88 min | 3.23% | C− |
Republic Airways cancels 3.5% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Flight by flight
Flights on BOS to CLT
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.
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Best ways to make this trip
The most reliable ways to fly Boston to Charlotte
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. 2 of the top 4 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. BOS → CLTBoston to Charlotte | American Airlines | 81.5% | 83.3% | 2.20% | 5am–8am, Wed | — |
| 2. PVD → CLTProvidence to Charlotte | American Airlines | 80.0% | 81.8% | 2.21% | 5am–8am, Wed | — |
| 3. BOS → CLTBoston to Charlotte | Republic Airways | 76.9% | 79.7% | 3.54% | 5am–8am, Sat | YX 5626 06:25 |
| 4. MHT → CLTManchester to Charlotte | PSA Airlines | 75.4% | 78.2% | 3.60% | 5am–8am, Thu | — |
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 32 points, against 4 points between the best and worst carrier.
- 5am–8am832 flights93.7%
- 8am–11am818 flights85.2%
- 11am–2pm714 flights84.9%
- 2pm–5pm759 flights76.4%
- 5pm–8pm843 flights70.7%
- 8pm–5am43 flights61.9%
Scale runs 55% to 100%.
The 8pm–5am window is where this operation falls apart: 61.9% on time, against 93.7% 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 5pm–8pm window is the busiest, with 843 flights scheduled in it.
Explore
Filter BOS to CLT 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 BOS to CLT, the best departure window is 5am–8am at 93.7% on time and the worst is 8pm–5am at 61.9%, a wide gap of 31.8 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am93.7%
- 8–11am85.2%
- 11am–2pm84.9%
- 2–5pm76.4%
- 5–8pm70.7%
- 8pm–5am61.9%
best all US flightsScale 55% to 100%.
Across the year
When delays peak on this route
This route's year swings by 19 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.
April is the best month on the calendar at 90.6% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. October was the busiest month here, with 370 flights.
Across the week, Wednesday is the strongest day at 85.7% on time and Sunday the weakest at 77.8%, a spread of 8 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 46% of the 57,000 delay minutes carriers reported here, and the remaining four split what is left.
- 46%Late-arriving aircraft
- 32%Carrier
- 18%National Airspace System
- 4%Extreme weather
- 0%Security
46% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 57,000 reported delay minutes here, that single category outweighs weather by 11 to one. The split is drawn from 56,724 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 93.7% on time here.
Cancellations run at 2.64%, 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 actually costs
7.3% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
The 728 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 76.0% on time across 4,006 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.
The sample behind these figures is 4,009 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Work out the risk of missing a connection in CLT after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. April runs 90.6% on time and September 71.8%, a swing of 19 points. If the dates move at all, move them out of September before you think about anything else. 3,897 completed flights over 12 months sit behind that.
Common questions
BOS to CLT questions
How often is BOS to CLT delayed?
About one flight in six arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 18.0% of the 4,009 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on BOS to CLT?
American Airlines leads at 83.3% on time across 2,728 flights. Republic Airways is at the other end on 79.7%, a gap of 4 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on BOS to CLT?
The 5am–8am departure window is the strongest at 93.7% on time. The 8pm–5am window is the weakest at 61.9%, 32 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 September delays on BOS to CLT?
September is the weakest month at 71.8% on time, compared with 90.6% in April. Across the year that is 19 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
- CLT to BOS — the return legseparate record
- Boston Logan International (BOS) delay statistics
- Charlotte Douglas International (CLT) delay statistics
- American Airlines on BOS to CLT83.3%
- Republic Airways on BOS to CLT79.7%
- BOS to DCA, a related route72.6%
- MCO to CLT, a related route78.6%
- BOS to ORD, a related route71.9%
- Envoy Air on-time record100.0%
- American Airlines on-time record83.3%
- Republic Airways on-time record79.7%
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Direction matters. BOS to CLT and CLT to BOS 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.