Flight number record
YX 5647
Republic Airways · Boston to Savannah
- Route
- BOS → SAV
- Departs
- 12:10
- Flights
- 262
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s YX 5647, 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 5647 lands a B, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about 50 minutes on average. That is a workable record, not a spotless one. That rests on 262 flights, with a median arrival 11 minutes early.
Key figures
On time
80.1%
Arrivals under 15 minutes late, of 256 completed flights
Avg delay
51 min
Across delayed arrivals only, not all flights
Cancelled
2.29%
National rate is 1.81%
1 hour+ late
6.6%
National rate is 8.1%
These figures cover 262 flights between July 2025 and June 2026. The median arrival is 11 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.
Schedule
When YX 5647 flies
YX 5647 flies BOS to SAV without a single fixed slot. Its most common scheduled departure was 12:10, used on 107 of 262 flights, with 11:05 (41 flights) and 12:23 (29 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 12:10107 flights40.8%
- Departs 11:0541 flights15.6%
- Departs 12:2329 flights11.1%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 12:10 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and YX 5647 runs level with that at 80.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
YX 5647 next to BOS to SAV
Every carrier on BOS to SAV combined arrived on time 80.0% of the time across 1,076 flights, so YX 5647 is about level with it. Republic flew 416 flights on the same city pair under all its flight numbers, including this one, and those ran 80.5% on time. Across its whole network Republic Airways managed 78.5%, which this flight beats by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 5647thin sample | 262 | 80.1% | 51 min | 2.29% | B |
| All Republic Airways on BOS–SAV | 416 | 80.5% | 44 min | 1.44% | B |
| All carriers on BOS–SAV | 1,076 | 80.0% | 57 min | 1.86% | B |
| Republic Airways, whole network | 361,482 | 78.5% | 72 min | 4.08% | B− |
Across the year
YX 5647 quarter by quarter
YX 5647 did not run the same all year. Its best quarter was Apr–Jun 2026 at 86.1% on time and its weakest Oct–Dec 2025 at 75.7%, a swing of 10 points on roughly 66 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202565 flights84.6%
- Oct–Dec 202575 flights75.7%
- Jan–Mar 202686 flights77.8%
- Apr–Jun 202636 flights86.1%
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, YX 5647 did best on Wednesday at 87.5% on time and worst on Sunday at 66.7%. Each day rests on about 37 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Delay causes
Why YX 5647 runs late
One category carries most of the weight here. Carrier accounts for 52% of the 2,603 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 52%Carrier
- 31%National Airspace System
- 15%Late-arriving aircraft
- 3%Extreme weather
The largest share of delay minutes, 52%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,350 of the 2,603 delay minutes reported here. The split is drawn from 2,603 delay minutes reported on YX 5647.
Cancellations sit at 2.29% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
6.6% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about 50 minutes, which a normal layover absorbs.
The 901 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
YX 5647 is not only a BOS to SAV flight. It also flew SAV to BOS (261 flights, 64.3% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 262 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SAV to BOSthin sample | 261 | 64.3% | 88 min | 4.60% | D− |
What to do with this
Booking YX 5647
For a booking, read YX 5647 as 80.1% on time with 2.29% cancelled over 262 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- BOS to SAV, every carrier and departure
- SAV to BOS, the return direction
- JetBlue Airways 249 on the same route82.6%
- 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
- Worst months to fly in the US, ranked by the data
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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.