Flight number record
YX 5727
Republic Airways · New York to Boston
- Route
- LGA → BOS
- Departs
- 15:00
- Flights
- 273
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s YX 5727, 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 5727 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 273 flights, with a median arrival 2 minutes late.
The national on-time rate over the same period is 77.6%, so YX 5727 runs 16 points behind the country as a whole. Across a thousand flights that is about 156 extra late arrivals.
Key figures
On time
62.0%
Arrivals under 15 minutes late, of 263 completed flights
Avg delay
67 min
Across delayed arrivals only, not all flights
Cancelled
3.66%
National rate is 1.81%
1 hour+ late
16.7%
National rate is 8.1%
These figures cover 273 flights between July 2025 and June 2026. Beyond the headline rate, 16.7% 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 5727 flies
YX 5727 is scheduled to leave New York (LGA) at 15:00 local time and reach Boston (BOS) at 16:22. That slot held for 231 of the 273 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.
- Departs 15:00231 flights84.6%
- Departs 14:5942 flights15.4%
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 15:00 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and YX 5727 runs 10 points worse at 62.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
YX 5727 next to LGA to BOS
Every carrier on LGA to BOS combined arrived on time 73.8% of the time across 7,255 flights, so YX 5727 is 12 points behind it. Republic flew 6,712 flights on the same city pair under all its flight numbers, including this one, and those ran 73.6% on time. Across its whole network Republic Airways managed 78.5%, which this flight trails by 17 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 5727thin sample | 273 | 62.0% | 67 min | 3.66% | D− |
| All Republic Airways on LGA–BOS | 6,712 | 73.6% | 68 min | 5.44% | C− |
| All carriers on LGA–BOS | 7,255 | 73.8% | 69 min | 5.32% | C− |
| Republic Airways, whole network | 361,482 | 78.5% | 72 min | 4.08% | B− |
Across the year
YX 5727 quarter by quarter
YX 5727 did not run the same all year. Its best quarter was Jan–Mar 2026 at 78.4% on time and its weakest Jul–Sep 2025 at 52.6%, a swing of 26 points on roughly 68 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 202579 flights52.6%
- Oct–Dec 202568 flights56.1%
- Jan–Mar 202642 flights78.4%
- Apr–Jun 202684 flights67.9%
Scale runs 45% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, YX 5727 ranged from 57.1% on Sunday to 68.2% on Tuesday. With about 39 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Delay causes
Why YX 5727 runs late
One category carries most of the weight here. National Airspace System accounts for 57% of the 6,671 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.
- 57%National Airspace System
- 21%Late-arriving aircraft
- 21%Carrier
- 0%Extreme weather
57% 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 3,830 minutes out of 6,671, against a national NAS share of 21%. The split is drawn from 6,671 delay minutes reported on YX 5727.
Cancellations run at 3.66%, against 1.81% 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
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 16.7% 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.
The same number turns up on two other city pairs in the data, including CHS to BOS (12) and BOS to RDU (2), but none flew often enough under YX 5727 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LGA to BOS only.
One caution: this is a thin sample. 273 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 5727
For a booking, the cancellation rate is the figure to plan around on YX 5727: 3.66% of its 273 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
- LGA to BOS, every carrier and departure
- BOS to LGA, the return direction
- Republic Airways 5725 on the same route68.5%
- Republic Airways 5761 on the same route81.4%
- Republic Airways 5746 on the same route53.5%
- Republic Airways 5745 on the same route80.5%
- Republic Airways 5819 on the same route55.4%
- LaGuardia (LGA) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.