Flight number record
YX 5665
Republic Airways · Boston to Richmond
- Route
- BOS → RIC
- Departs
- 16:10
- Flights
- 325
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s YX 5665, 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 5665 lands a B−, about a point worse than the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 325 flights, with a median arrival 11 minutes early.
Key figures
On time
76.5%
Arrivals under 15 minutes late, of 310 completed flights
Avg delay
62 min
Across delayed arrivals only, not all flights
Cancelled
3.69%
National rate is 1.89%
1 hour+ late
9.0%
National rate is 8.3%
These figures cover 325 flights between September 2025 and August 2026. Beyond the headline rate, 9.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When YX 5665 flies
YX 5665 flies BOS to RIC without a single fixed slot. Its most common scheduled departure was 16:10, used on 77 of 325 flights, with 16:07 (48 flights) and 16:06 (41 flights) next.
- Departs 16:1077 flights23.7%
- Departs 16:0748 flights14.8%
- Departs 16:0641 flights12.6%
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 16:10 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and YX 5665 runs 5 points better at 76.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
YX 5665 next to BOS to RIC
Every carrier on BOS to RIC combined arrived on time 76.7% of the time across 1,691 flights, so YX 5665 is about level with it. Republic flew 934 flights on the same city pair under all its flight numbers, including this one, and those ran 79.3% on time. Across its whole network Republic Airways managed 78.1%, which this flight trails by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 5665thin sample | 325 | 76.5% | 62 min | 3.69% | B− |
| All Republic Airways on BOS–RIC | 934 | 79.3% | 62 min | 3.43% | B− |
| All carriers on BOS–RIC | 1,691 | 76.7% | 63 min | 3.67% | B− |
| Republic Airways, whole network | 364,452 | 78.1% | 74 min | 4.55% | B− |
Across the year
YX 5665 quarter by quarter
YX 5665 did not run the same all year. Its best quarter was Apr–Jun 2026 at 87.4% on time and its weakest Oct–Dec 2025 at 68.4%, a swing of 19 points on roughly 81 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 202530 flights—
- Oct–Dec 202578 flights68.4%
- Jan–Mar 202673 flights75.8%
- Apr–Jun 202687 flights87.4%
- Jul–Sep 202657 flights71.2%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, YX 5665 did best on Saturday at 84.6% on time and worst on Sunday at 65.8%. Each day rests on about 46 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late YX 5665 runs when it is late
YX 5665 often beats the schedule: 127 of 310 completed flights, 41%, arrived 15 minutes or more early. The 73 late arrivals split 25 under half an hour, 20 between 30 and 60 minutes, and 28 an hour or more.
- 15+ min early127 flights41.0%
- Within 15 min110 flights35.5%
- 15–29 min late25 flights8.1%
- 30–59 min late20 flights6.5%
- 1–2 hours late18 flights5.8%
- 2+ hours late10 flights3.2%
Scale runs 0% to 100%.
Share of 310 completed flights by arrival against schedule.
20 of 83 late departures made up the time and arrived on time, 24% of them. 10 flights left on time and still arrived late.
The worst days
Worst days for YX 5665
The latest arrival of the period was on 10 November 2025, 4 hours behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 10 November 2025 | 4 hours | Late-arriving aircraft |
| 9 December 2025 | 3 hours 45 minutes | Carrier |
| 19 January 2026 | 3 hours 26 minutes | Carrier |
| 21 July 2026 | 3 hours 7 minutes | Late-arriving aircraft |
| 19 December 2025 | 2 hours 39 minutes | Carrier |
Delay causes
Why YX 5665 runs late
Carrier accounts for 46% of the 4,554 delay minutes carriers reported here, and the remaining four split what is left.
- 46%Carrier
- 38%Late-arriving aircraft
- 16%National Airspace System
38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,554 reported delay minutes here, that single category outweighs weather by 38 to one. The split is drawn from 4,554 delay minutes reported on YX 5665.
Cancellations run at 3.69%, against 1.89% nationally. That is roughly one flight in 25 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
9.0% 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.
YX 5665 is not only a BOS to RIC flight. It also flew RIC to BOS (284 flights, 61.7% 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. 325 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 |
|---|---|---|---|---|---|
| RIC to BOSthin sample | 284 | 61.7% | 75 min | 5.28% | D− |
What to do with this
Booking YX 5665
For a booking, the cancellation rate is the figure to plan around on YX 5665: 3.69% of its 325 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- BOS to RIC, every carrier and departure
- RIC to BOS, the return direction
- JetBlue Airways 1281 on the same route87.0%
- 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
- Why the first flight of the morning is statistically safest
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.