Flight number record
YX 5648
Republic Airways · Charlotte to Boston
- Route
- CLT → BOS
- Departs
- 06:00
- Flights
- 255
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s YX 5648, check with Republic Airways. Republic Airways flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
YX 5648 earns an A−. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 14 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 255 flights, with a median arrival 13 minutes early.
Set against the rest of the country, YX 5648's record is 14 points better than the US average of 77.3%. That gap is worth roughly 138 fewer late arrivals for every thousand flights.
Key figures
On time
91.1%
Arrivals under 15 minutes late, of 247 completed flights
Avg delay
88 min
Across delayed arrivals only, not all flights
Cancelled
3.14%
National rate is 1.89%
1 hour+ late
4.0%
National rate is 8.3%
These figures cover 255 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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Schedule
When YX 5648 flies
YX 5648 flies CLT to BOS without a single fixed slot. Its most common scheduled departure was 06:00, used on 86 of 255 flights, with 06:05 (78 flights) and 06:10 (31 flights) next.
- Departs 06:0086 flights33.7%
- Departs 06:0578 flights30.6%
- Departs 06:1031 flights12.2%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and YX 5648 runs level with that at 91.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
YX 5648 next to CLT to BOS
Every carrier on CLT to BOS combined arrived on time 76.0% of the time across 4,006 flights, so YX 5648 is 15 points ahead of it. Republic flew 1,214 flights on the same city pair under all its flight numbers, including this one, and those ran 80.8% on time. Across its whole network Republic Airways managed 78.1%, which this flight beats by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 5648thin sample | 255 | 91.1% | 88 min | 3.14% | A− |
| All Republic Airways on CLT–BOS | 1,214 | 80.8% | 76 min | 3.13% | B− |
| All carriers on CLT–BOS | 4,006 | 76.0% | 69 min | 2.47% | B |
| Republic Airways, whole network | 364,452 | 78.1% | 74 min | 4.55% | B− |
Across the year
YX 5648 quarter by quarter
Quarter by quarter YX 5648 held fairly steady: 88.2% in Jan–Mar 2026, 94.5% in Apr–Jun 2026 and 89.8% in Jul–Sep 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Oct–Dec 202512 flights—
- Jan–Mar 202690 flights88.2%
- Apr–Jun 202691 flights94.5%
- Jul–Sep 202662 flights89.8%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, YX 5648 did best on Thursday at 97.2% on time and worst on Sunday at 80.0%. Each day rests on about 36 flights, so a gap of 17 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late YX 5648 runs when it is late
YX 5648 often beats the schedule: 106 of 247 completed flights, 43%, arrived 15 minutes or more early. The 22 late arrivals split 7 under half an hour, 5 between 30 and 60 minutes, and 10 an hour or more.
- 15+ min early106 flights42.9%
- Within 15 min119 flights48.2%
- 15–29 min late7 flights2.8%
- 30–59 min late5 flights2.0%
- 1–2 hours late6 flights2.4%
- 2+ hours late4 flights1.6%
Scale runs 0% to 100%.
Share of 247 completed flights by arrival against schedule.
5 of 22 late departures made up the time and arrived on time, 23% of them. 5 flights left on time and still arrived late.
The worst days
Worst days for YX 5648
The latest arrival of the period was on 21 June 2026, 6 hours 56 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in August 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 June 2026 | 6 hours 56 minutes | Carrier |
| 8 August 2026 | 5 hours 17 minutes | National Airspace System |
| 9 August 2026 | 2 hours 58 minutes | Carrier |
| 19 August 2026 | 2 hours 40 minutes | Carrier |
| 5 July 2026 | 1 hour 44 minutes | Carrier |
Delay causes
Why YX 5648 runs late
Carrier accounts for 80% of the 1,925 delay minutes carriers reported here, and the remaining four split what is left.
- 80%Carrier
- 20%National Airspace System
The largest share of delay minutes, 80%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,543 of the 1,925 delay minutes reported here. The split is drawn from 1,925 delay minutes reported on YX 5648.
Cancellations run at 3.14%, against 1.89% nationally. That is about one flight in 30 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 routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.0% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
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 same number turns up on one other city pair in the data, including BOS to JFK (109), but none flew often enough under YX 5648 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to CLT to BOS only.
One caution: this is a thin sample. 255 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 YX 5648
For a booking, the cancellation rate is the figure to plan around on YX 5648: 3.14% of its 255 scheduled flights did not operate. A late arrival costs an hour and a half, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- CLT to BOS, every carrier and departure
- BOS to CLT, the return direction
- American Airlines 1843 on the same route70.8%
- Republic Airways 5630 on the same route71.8%
- Charlotte Douglas International (CLT) delay statistics
- Boston Logan International (BOS) delay statistics
- Republic Airways on-time record
- Every Republic Airways flight number with a record
- The most and least reliable flight numbers in the US
- What a cancellation rate actually tells you (and what it hides)
A flight number here means Republic Airways’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
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.