Flight number record
YX 5718
Republic Airways · Boston to Newark
- Route
- BOS → EWR
- Departs
- 18:15
- Flights
- 295
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s YX 5718, 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 5718 draws a D−. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is about an hour behind schedule. Build slack into anything you connect to. That rests on 295 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.3%, so YX 5718 runs 16 points behind the country as a whole. Across a thousand flights that is about 162 extra late arrivals.
Key figures
On time
61.1%
Arrivals under 15 minutes late, of 265 completed flights
Avg delay
64 min
Across delayed arrivals only, not all flights
Cancelled
10.17%
National rate is 1.89%
1 hour+ late
17.0%
National rate is 8.3%
These figures cover 295 flights between September 2025 and August 2026. Beyond the headline rate, 17.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When YX 5718 flies
YX 5718 flies BOS to EWR without a single fixed slot. Its most common scheduled departure was 18:15, used on 73 of 295 flights, with 17:05 (31 flights) and 18:05 (31 flights) next.
- Departs 18:1573 flights24.7%
- Departs 17:0531 flights10.5%
- Departs 18:0531 flights10.5%
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 18:15 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and YX 5718 runs 7 points worse at 61.1%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
YX 5718 next to BOS to EWR
Every carrier on BOS to EWR combined arrived on time 75.7% of the time across 3,860 flights, so YX 5718 is 15 points behind it. Republic flew 1,165 flights on the same city pair under all its flight numbers, including this one, and those ran 75.3% on time. Across its whole network Republic Airways managed 78.1%, which this flight trails by 17 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 5718thin sample | 295 | 61.1% | 64 min | 10.17% | D− |
| All Republic Airways on BOS–EWR | 1,165 | 75.3% | 66 min | 6.78% | B− |
| All carriers on BOS–EWR | 3,860 | 75.7% | 82 min | 4.51% | B− |
| Republic Airways, whole network | 364,452 | 78.1% | 74 min | 4.55% | B− |
Across the year
YX 5718 quarter by quarter
YX 5718 did not run the same all year. Its best quarter was Jan–Mar 2026 at 78.8% on time and its weakest Oct–Dec 2025 at 43.3%, a swing of 36 points on roughly 74 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 202527 flights—
- Oct–Dec 202567 flights43.3%
- Jan–Mar 202671 flights78.8%
- Apr–Jun 202677 flights72.6%
- Jul–Sep 202653 flights52.4%
Scale runs 35% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, YX 5718 did best on Monday at 68.2% on time and worst on Friday at 53.2%. Each day rests on about 42 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late YX 5718 runs when it is late
The 103 late arrivals split 27 under half an hour, 31 between 30 and 60 minutes, and 45 an hour or more.
- 15+ min early65 flights24.5%
- Within 15 min97 flights36.6%
- 15–29 min late27 flights10.2%
- 30–59 min late31 flights11.7%
- 1–2 hours late34 flights12.8%
- 2+ hours late11 flights4.2%
Scale runs 0% to 100%.
Share of 265 completed flights by arrival against schedule.
17 of 109 late departures made up the time and arrived on time, 16% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for YX 5718
The latest arrival of the period was on 18 June 2026, 4 hours 55 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as national airspace system delay.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 June 2026 | 4 hours 55 minutes | Carrier |
| 27 July 2026 | 3 hours 39 minutes | National Airspace System |
| 3 July 2026 | 3 hours 33 minutes | National Airspace System |
| 12 June 2026 | 2 hours 59 minutes | National Airspace System |
| 14 October 2025 | 2 hours 40 minutes | Late-arriving aircraft |
Delay causes
Why YX 5718 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 6,606 reported delay minutes.
- 42%National Airspace System
- 41%Late-arriving aircraft
- 16%Carrier
- 1%Extreme weather
41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 6,606 reported delay minutes here, that single category outweighs weather by 36 to one. The split is drawn from 6,606 delay minutes reported on YX 5718.
Cancellations run at 10.17%, against 1.89% nationally. That is about one flight in ten 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
17.0% 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 5718 is not only a BOS to EWR flight. It also flew EWR to BOS (295 flights, 68.7% 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. 295 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 |
|---|---|---|---|---|---|
| EWR to BOSthin sample | 295 | 68.7% | 92 min | 11.19% | C− |
What to do with this
Booking YX 5718
For a booking, the cancellation rate is the figure to plan around on YX 5718: 10.17% of its 295 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 EWR, every carrier and departure
- EWR to BOS, the return direction
- United Airlines 1833 on the same route92.8%
- United Airlines 570 on the same route89.4%
- United Airlines 2394 on the same route87.1%
- Boston Logan International (BOS) delay statistics
- Newark Liberty International (EWR) 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.