Flight number record

YX 5727

Republic Airways · New York to Boston

Route: LGA → BOS
Departs: 15:00
Flights: 282
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 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 a little over an hour behind schedule. Build slack into anything you connect to. That rests on 282 flights, with a median arrival 2 minutes late.

The national on-time rate over the same period is 77.3%, so YX 5727 runs 16 points behind the country as a whole. Across a thousand flights that is about 158 extra late arrivals.

On time

61.5%

Arrivals under 15 minutes late, of 270 completed flights

Avg delay

70 min

Across delayed arrivals only, not all flights

Cancelled

4.26%

National rate is 1.89%

1 hour+ late

17.4%

National rate is 8.3%

These figures cover 282 flights between September 2025 and August 2026. Beyond the headline rate, 17.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

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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 240 of the 282 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.

Departs 15:00240 flights85.1%
Departs 14:5942 flights14.9%

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 15:00 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and YX 5727 runs 10 points worse at 61.5%. 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 5727 next to LGA to BOS

Every carrier on LGA to BOS combined arrived on time 73.1% of the time across 7,443 flights, so YX 5727 is 12 points behind it. Republic flew 6,974 flights on the same city pair under all its flight numbers, including this one, and those ran 73.1% on time. Across its whole network Republic Airways managed 78.1%, which this flight trails by 17 points.

YX 5727 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 5727thin sample	282	61.5%	70 min	4.26%	D−
All Republic Airways on LGA–BOS	6,974	73.1%	70 min	6.28%	C−
All carriers on LGA–BOS	7,443	73.1%	70 min	6.17%	C−
Republic Airways, whole network	364,452	78.1%	74 min	4.55%	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 Oct–Dec 2025 at 56.1%, a swing of 22 points on roughly 71 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 202526 flights—
Oct–Dec 202568 flights56.1%
Jan–Mar 202642 flights78.4%
Apr–Jun 202684 flights67.9%
Jul–Sep 202662 flights57.9%

Scale runs 50% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, YX 5727 did best on Tuesday at 70.7% on time and worst on Thursday at 53.7%. Each day rests on about 40 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late YX 5727 runs when it is late

The 104 late arrivals split 11 under half an hour, 46 between 30 and 60 minutes, and 47 an hour or more.

15+ min early67 flights24.8%
Within 15 min99 flights36.7%
15–29 min late11 flights4.1%
30–59 min late46 flights17.0%
1–2 hours late35 flights13.0%
2+ hours late12 flights4.4%

Scale runs 0% to 100%.

Share of 270 completed flights by arrival against schedule.

Time lost at the gate mostly stays lost. Of 97 departures that left 15 minutes late or more, only 9 made it up before arrival. In the other direction, 16 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at BOS.

The worst days

Worst days for YX 5727

The latest arrival of the period was on 10 November 2025, 5 hours 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.

The latest arrivals of YX 5727 in the period
Date	Arrived late by	Largest filed cause
10 November 2025	5 hours	Carrier
13 October 2025	4 hours 40 minutes	National Airspace System
22 July 2026	3 hours 33 minutes	National Airspace System
10 August 2026	2 hours 48 minutes	Late-arriving aircraft
11 March 2026	2 hours 26 minutes	National Airspace System

Delay causes

Why YX 5727 runs late

National Airspace System accounts for 58% of the 7,265 delay minutes carriers reported here, and the remaining four split what is left.

National Airspace System
58%
Late-arriving aircraft
21%
Carrier
20%
Extreme weather
0%

58% 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 4,234 minutes out of 7,265, against a national NAS share of 21%. The split is drawn from 7,265 delay minutes reported on YX 5727.

Cancellations run at 4.26%, against 1.89% nationally. That is about 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

17.4% 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.

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. 282 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: 4.26% of its 282 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.

Where to go next

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 22 October 2026; recomputed monthly. How this data is collected.

Key figures