Flight number record
YX 5718
Republic Airways · Boston to Newark
- Route
- BOS → EWR
- Departs
- 18:15
- Flights
- 303
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 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 303 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.6%, so YX 5718 runs 17 points behind the country as a whole. Across a thousand flights that is about 175 extra late arrivals.
Key figures
On time
60.1%
Arrivals under 15 minutes late, of 273 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
9.90%
National rate is 1.81%
1 hour+ late
16.5%
National rate is 8.1%
These figures cover 303 flights between July 2025 and June 2026. Beyond the headline rate, 16.5% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
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 46 of 303 flights, with 17:28 (31 flights) and 18:05 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 18:1546 flights15.2%
- Departs 17:2831 flights10.2%
- Departs 18:0531 flights10.2%
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 18:15 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and YX 5718 runs 8 points worse at 60.1%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Against the route
YX 5718 next to BOS to EWR
Every carrier on BOS to EWR combined arrived on time 74.9% of the time across 3,906 flights, so YX 5718 is 15 points behind it. Republic flew 1,187 flights on the same city pair under all its flight numbers, including this one, and those ran 73.7% on time. Across its whole network Republic Airways managed 78.5%, which this flight trails by 18 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 5718thin sample | 303 | 60.1% | 61 min | 9.90% | D− |
| All Republic Airways on BOS–EWR | 1,187 | 73.7% | 69 min | 6.32% | C− |
| All carriers on BOS–EWR | 3,906 | 74.9% | 79 min | 4.33% | C− |
| Republic Airways, whole network | 361,482 | 78.5% | 72 min | 4.08% | 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 76 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 202588 flights44.6%
- Oct–Dec 202567 flights43.3%
- Jan–Mar 202671 flights78.8%
- Apr–Jun 202677 flights72.6%
Scale runs 35% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, YX 5718 did best on Monday at 71.4% on time and worst on Friday at 54.3%. Each day rests on about 43 flights, so a gap of 17 points is worth noticing but could still narrow in another year.
Delay causes
Why YX 5718 runs late
One category carries most of the weight here. National Airspace System accounts for 49% of the 6,651 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.
- 49%National Airspace System
- 34%Late-arriving aircraft
- 15%Carrier
- 3%Extreme weather
49% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 3,238 minutes out of 6,651, against a national NAS share of 21%. The split is drawn from 6,651 delay minutes reported on YX 5718.
Cancellations run at 9.90%, against 1.81% 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
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 16.5% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum 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 (303 flights, 66.3% 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. 303 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 | 303 | 66.3% | 80 min | 10.89% | C− |
What to do with this
Booking YX 5718
For a booking, the cancellation rate is the figure to plan around on YX 5718: 9.90% of its 303 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 route94.4%
- United Airlines 570 on the same route89.4%
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.