Flight number record

YX 5720

Republic Airways · Boston to New York

Route: BOS → JFK
Departs: 09:59
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s YX 5720, 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 5720 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 10 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 50 minutes. That rests on 364 flights, with a median arrival 9 minutes early.

Set against the rest of the country, YX 5720's record is 10 points better than the US average of 77.6%. That gap is worth roughly 95 fewer late arrivals for every thousand flights.

On time

87.1%

Arrivals under 15 minutes late, of 357 completed flights

Avg delay

50 min

Across delayed arrivals only, not all flights

Cancelled

1.92%

National rate is 1.81%

1 hour+ late

2.8%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 2026. The median arrival is 9 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Schedule

When YX 5720 flies

YX 5720 flies BOS to JFK without a single fixed slot. Its most common scheduled departure was 09:59, used on 129 of 364 flights, with 09:05 (111 flights) and 10:00 (41 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 09:59129 flights35.4%
Departs 09:05111 flights30.5%
Departs 10:0041 flights11.3%

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 09:59 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and YX 5720 runs 3 points better at 87.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

YX 5720 next to BOS to JFK

Every carrier on BOS to JFK combined arrived on time 75.5% of the time across 5,738 flights, so YX 5720 is 12 points ahead of it. Republic flew 2,915 flights on the same city pair under all its flight numbers, including this one, and those ran 75.1% on time. Across its whole network Republic Airways managed 78.5%, which this flight beats by 9 points.

YX 5720 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 5720thin sample	364	87.1%	50 min	1.92%	A
All Republic Airways on BOS–JFK	2,915	75.1%	66 min	5.01%	B−
All carriers on BOS–JFK	5,738	75.5%	73 min	4.55%	B−
Republic Airways, whole network	361,482	78.5%	72 min	4.08%	B−

Across the year

YX 5720 quarter by quarter

YX 5720 did not run the same all year. Its best quarter was Jul–Sep 2025 at 92.4% on time and its weakest Jan–Mar 2026 at 77.6%, a swing of 15 points on roughly 91 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 202592 flights92.4%
Oct–Dec 202591 flights86.7%
Jan–Mar 202690 flights77.6%
Apr–Jun 202691 flights91.1%

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, YX 5720 did best on Wednesday at 94.2% on time and worst on Tuesday at 80.4%. Each day rests on about 52 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Delay causes

Why YX 5720 runs late

One category carries most of the weight here. Carrier accounts for 47% of the 2,308 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.

Carrier
47%
National Airspace System
32%
Late-arriving aircraft
19%
Extreme weather
3%

The largest share of delay minutes, 47%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,079 of the 2,308 delay minutes reported here. The split is drawn from 2,308 delay minutes reported on YX 5720.

Cancellations sit at 1.92% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 2.8% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

Every one of the 364 flights under YX 5720 in the data flew BOS to JFK. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 364 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 5720

For a booking, read YX 5720 as 87.1% on time with 1.92% cancelled over 364 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures