CLT → BOS Flight Reliability

Right now

Origin · CLTNo disruption reported

Aviation weather is not currently a factor.

Updated 07:52 UTC

Charlotte airport profile →

Destination · BOSNo disruption reported

Aviation weather is not currently a factor.

Updated 07:54 UTC

Boston airport profile →

Route reliability

July 2023 – July 2026

Route Reliability Score

53/ 100Fair

Better than 20% of comparable major US routes (4,598 compared)

Calculated from 14,289 flights. How this is calculated

On-time arrivals

74.3%

10,408 of 14,017

Cancellation rate

1.80%

257 cancelled

Median arrival delay

-4 min

Average 10.9 min

Severe delays

10.2%

60+ minutes late

Delay when late

70 min

Average, when 15+ min late

Flights analyzed

14,289

4 carriers

CLT → BOS arrives on time 74.3% of the time; the return trip, BOS → CLT, arrives on time 81.3% of the time, a 7.1-point gap between the two directions of the same city pair.

CLT → BOS spends 30.0 minutes on the ground on a 728-mile trip: 21.4 minutes from pushback to wheels-up at CLT and 8.6 minutes from touchdown to gate at BOS.

Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026

What stands out

The airline matters unusually much on this route, a wider carrier-to-carrier gap than 96% of 2,692 comparable routes.

Republic Airways arrived on time 81.8% of the time, against 60.3% for Spirit Airlines, flying the exact same route.

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Ranked against every other route with the same kind of figure and at least 2,692 in the comparison.

Why CLT → BOS flights are cancelled

July 2023 – July 2026

CLT → BOS cancelled 257 of 14,289 scheduled flights — about 1 in every 56. The reason filed most often was extreme weather, 66.5% of the cancellations coded on this route — about 1 in every 84 scheduled flights.

Share of cancellations

Weather66.5%

Air traffic21.4%

Airline12.1%

Security0.0%

Of 257 cancelled departures carrying a reason code.

What each reason means

Extreme weather1 in 84

Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.

171 cancellations, 66.5% of the total.

The air traffic system1 in 260

Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.

55 cancellations, 21.4% of the total.

The airline1 in 461

Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.

31 cancellations, 12.1% of the total.

Security—

A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.

0 cancellations, 0.0% of the total.

Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.

257 coded cancellations were recorded on CLT → BOS; the section appears from 50.

When it goes wrong

July 2023 – July 2026

One arrival in ten is worse than

60 min late

against a median of 4 min early

Arrived an hour or more late10.2%

Typical delay when late70 min

Cancelled1.80%

Landed somewhere else0.10%

CLT → BOS has an average that understates its risk: a typical arrival is 4 min early, but the worst tenth are 64 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.

Percentiles over 14,289 operations; cancelled and diverted flights are counted separately.

Will your connection be tight enough?

Layovers at BOS after arriving from CLT.

Connection buffer and chance of missing by layover length, CLT → BOS arrivals
Connection time	Chance of missing	Reads as
30 min	41%	Likely to miss
45 min	25%	High risk
60 min	17%	High risk
90 min	10.0%	Some risk
120 min	5.8%	Some risk

This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 1.80% of the time and diverts 0.10% of the time, which a late arrival never shows up in.

Chance of missing is the share of 14,017 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.

The worst tenth of arrivals on this route land at least 60 minutes late (90th-percentile gate arrival delay), over 14,289 operations.

Any other layover length: connection checker.

Best time to fly

CLT → BOS flights departing 5–9 AM arrived on time 88.0% of the time, against 59.3% for 9 PM–5 AM departures, a gap of 28.7 percentage points.

By day and hour

On-time arrival rate for each weekday and scheduled departure hour, in local time at the departure airport (CLT).

Hour of departure matters more than day of the week: hourly averages sit a typical 10.9 points from the route-wide rate, weekday averages 3.3 points.

On-time arrival rate for CLT to BOS by weekday and scheduled departure hour, local time. Each button reads out one slot.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
6 AM–7 AM
7 AM–8 AM
8 AM–9 AM
9 AM–10 AM
10 AM–11 AM
11 AM–12 PM
12 PM–1 PM
1 PM–2 PM
2 PM–3 PM
3 PM–4 PM
4 PM–5 PM
5 PM–6 PM
6 PM–7 PM
7 PM–8 PM
8 PM–9 PM

On-time rate, % · stronger color, fewer on time

40–49
50–59
60–69
70–79
80–89
90–99

Fewer than 120 flights, not scored

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · On time is arrival within 15 minutes of schedule. Cells round to whole percentages; the table shows one decimal.

No slot is named best or worst: too few reach 500 flights. Departures before 6 AM and after 9 PM (783 flights) are not drawn: no slot in those hours has enough flights to score.

View as tableHide table

On-time arrival rate (%) with flights beneath, by scheduled departure hour and weekday for CLT to BOS. A dash means fewer than 120 flights, which are not scored.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
6 AM–7 AM	89.2% on time162 flights	93.1% on time149 flights	94.2% on time156 flights	93.8% on time146 flights	88.1% on time162 flights	71 flights, too few to score	95 flights, too few to score
7 AM–8 AM	86.1% on time156 flights	112 flights, too few to score	81.7% on time131 flights	85.2% on time182 flights	84.1% on time158 flights	90.4% on time179 flights	84.0% on time196 flights
8 AM–9 AM	100 flights, too few to score	85 flights, too few to score	86 flights, too few to score	92 flights, too few to score	98 flights, too few to score	98 flights, too few to score	99 flights, too few to score
9 AM–10 AM	79.8% on time132 flights	115 flights, too few to score	118 flights, too few to score	81.8% on time121 flights	79.6% on time137 flights	76 flights, too few to score	75.6% on time121 flights
10 AM–11 AM	84.0% on time156 flights	89.3% on time151 flights	90.9% on time143 flights	84.2% on time146 flights	87.1% on time150 flights	93 flights, too few to score	118 flights, too few to score
11 AM–12 PM	81.2% on time153 flights	91.6% on time132 flights	92.3% on time144 flights	79.3% on time164 flights	84.9% on time154 flights	87.0% on time124 flights	79.9% on time151 flights
12 PM–1 PM	32 flights, too few to score	64 flights, too few to score	46 flights, too few to score	26 flights, too few to score	33 flights, too few to score	44 flights, too few to score	25 flights, too few to score
1 PM–2 PM	71.4% on time172 flights	83.8% on time162 flights	74.4% on time166 flights	67.1% on time168 flights	67.3% on time162 flights	80.5% on time135 flights	72.5% on time164 flights
2 PM–3 PM	75.0% on time163 flights	72.5% on time153 flights	79.6% on time158 flights	67.1% on time165 flights	63.9% on time170 flights	82.4% on time136 flights	69.4% on time177 flights
3 PM–4 PM	104 flights, too few to score	85 flights, too few to score	84 flights, too few to score	99 flights, too few to score	104 flights, too few to score	90 flights, too few to score	99 flights, too few to score
4 PM–5 PM	61 flights, too few to score	67 flights, too few to score	63 flights, too few to score	59 flights, too few to score	63 flights, too few to score	75 flights, too few to score	56 flights, too few to score
5 PM–6 PM	64.7% on time210 flights	67.2% on time191 flights	64.6% on time199 flights	58.4% on time213 flights	66.5% on time207 flights	72.0% on time170 flights	63.7% on time208 flights
6 PM–7 PM	55.5% on time176 flights	62.6% on time166 flights	73.0% on time153 flights	59.9% on time168 flights	53.6% on time174 flights	115 flights, too few to score	45.8% on time173 flights
7 PM–8 PM	116 flights, too few to score	117 flights, too few to score	81.8% on time123 flights	114 flights, too few to score	62.9% on time122 flights	85 flights, too few to score	114 flights, too few to score
8 PM–9 PM	71.4% on time151 flights	64.7% on time142 flights	68.9% on time152 flights	61.1% on time150 flights	62.2% on time153 flights	68.3% on time145 flights	54.6% on time157 flights

By departure window

5–9 AM88.0%

9 AM–12 PM84.3%

12–3 PM73.8%

3–6 PM63.8%

6–9 PM64.6%

9 PM–5 AM59.3%

By departure hour

12 AM

3 AM

6 AM

9 AM

12 PM

3 PM

6 PM

9 PM

Why CLT → BOS runs late

July 2023 – July 2026

Late-arriving aircraft40.9%

the inbound aircraft was late, so this flight started late

The airline27.9%

crew, maintenance, boarding and fueling, all within the carrier’s control

Air traffic control24.4%

airspace and airport capacity, including weather-driven flow control

Weather6.6%

weather severe enough to stop this flight specifically

Security0.2%

screening or terminal security incidents

Share of the delay minutes US DOT attributed to each cause for CLT → BOS. Only delays of 15 minutes or more are attributed.

Late-arriving aircraft is the largest cause on CLT → BOS, at 40.9%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 88.0% of the time and 9 PM–5 AM departures 59.3%.

How this route holds up in bad weather

July 2023 – July 2026

Bad weather raises cancellations by a similar amount at both ends of CLT to BOS: 4.6 times the normal rate at CLT and 3.9 times at BOS. Cancelled in bad weather against normal hours: CLT 5.7% against 1.2%, BOS 5.3% against 1.4%. Flights that did leave BOS in bad weather arrived on time 65.1% of the time, against 79.7% in normal hours.

Bad weather and normal hours at the airports

Scheduled departures, July 2023 – July 2026

Departures from CLT and BOS in hours of bad weather and in normal hours
Departures from	CLT	BOS
Cancelled in bad weather	5.7%	5.3%
Cancelled in normal hours	1.2%	1.4%
Arrived on time, bad weather	63.5%	65.1%
Arrived on time, normal hours	75.9%	79.7%
Departures in bad weather	55,311	60,840

American Airlines (5.3% cancelled against 6.4% for the other carriers at CLT) cancelled fewer departures from CLT in bad weather than the other carriers there did in the same months. None of the route’s other carriers was clearly worse. One more carrier flies this route but has too few bad-weather departures from CLT to compare.

This route’s airlines in bad weather at CLT

All departures from CLT

Cancellation rates in bad weather at CLT for the airlines that fly CLT to BOS, against the other carriers at CLT in the same months
Airline	Bad-weather departures	Cancelled	Other carriers
Republic Airways	947	5.1%about level	6.3%
American Airlines	33,044	5.3%below the others	6.4%
Spirit Airlines	1,090	6.1%about level	5.7%

These are airport figures, not route figures: every scheduled departure from CLT and BOS, to any destination, in hours the weather report called bad. The airline rows count each carrier’s departures from CLT on every route.

Weather source and limits. In full: CLT (airlines), BOS, What Weather Costs Each Airport, Who Cancels More When the Weather Turns, Airports That Change Places When Weather Turns.

Airlines on this route

Carriers with at least 200 flights, by the airline that operated each one.

Airlines on this route
Carrier	Flights	On time	Cancelled	Median delay	Severe
American Airlines	8,616	71.4%	1.53%	-2 min	10.6%
Republic Airways	4,105	81.8%	1.88%	-9 min	8.1%
JetBlue	933	76.0%	2.14%	-6 min	11.6%
Spirit Airlines	480	60.3%	5.00%	5 min	17.8%

American Airlines flew 61.0% of the 14,134 flights listed. Spirit Airlines cancelled 5.00% of its flights here against 1.53% for American Airlines.

Republic Airways arrived on time 21.5 percentage points more often than Spirit Airlines on this route.

Flights on this route

Flight numbers with at least 600 operations here and still on the schedule.

Flights on this route
Flight	Scheduled	Operations	On time
AA1843 American Airlines	8:25 PM	1,098	64.3%

Weekly and seasonal patterns

By day of week

Mon73.5%

Tue77.9%

Wed78.4%

Thu71.1%

Fri71.4%

Sat78.2%

Sun70.3%

Wednesday is historically the most reliable day and Sunday the least, a gap of 8.1 percentage points.

By month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

July is historically the weakest month and November the strongest, a spread of 20.2 percentage points.

Reliability over time

July 2023 – July 2026

24

25

26

Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 76.6% against 75.3% in the 12 months before — broadly unchanged.

Data and methodology

Calculated by FlyerIntel from 14,289 CLT → BOS flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.

Full methodology · Data sources · Report a problem

Analysis last recomputed September 26, 2026

CLT airport BOS airport Return direction BOS → CLT

CLT→BOS

Right now

Route reliability

What stands out

Why CLT → BOS flights are cancelled

Share of cancellations

What each reason means

When it goes wrong

Will your connection be tight enough?

Best time to fly

By day and hour

By departure window

By departure hour

Why CLT → BOS runs late

How this route holds up in bad weather

Bad weather and normal hours at the airports

This route’s airlines in bad weather at CLT

Airlines on this route

Flights on this route

Weekly and seasonal patterns

By day of week

By month

Reliability over time

Data and methodology