Flight number record

YX 4725

Republic Airways · Boston to Indianapolis

Route: BOS → IND
Departs: 07:00
Flights: 313
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s YX 4725, 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 4725 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 13 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 50 minutes. That rests on 313 flights, with a median arrival 17 minutes early.

Set against the rest of the country, YX 4725's record is 13 points better than the US average of 77.6%. That gap is worth roughly 125 fewer late arrivals for every thousand flights.

On time

90.1%

Arrivals under 15 minutes late, of 304 completed flights

Avg delay

52 min

Across delayed arrivals only, not all flights

Cancelled

2.88%

National rate is 1.81%

1 hour+ late

3.0%

National rate is 8.1%

These figures cover 313 flights between July 2025 and June 2026. The median arrival is 17 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 4725 flies

YX 4725 flies BOS to IND without a single fixed slot. Its most common scheduled departure was 07:00, used on 172 of 313 flights, with 08:25 (54 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:00172 flights55.0%
Departs 08:2554 flights17.3%

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 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and YX 4725 runs level with that at 90.1%. 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 4725 next to BOS to IND

Every carrier on BOS to IND combined arrived on time 81.6% of the time across 2,017 flights, so YX 4725 is 9 points ahead of it. Republic flew 1,962 flights on the same city pair under all its flight numbers, including this one, and those ran 81.9% on time. Across its whole network Republic Airways managed 78.5%, which this flight beats by 12 points.

YX 4725 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 4725thin sample	313	90.1%	52 min	2.88%	A
All Republic Airways on BOS–IND	1,962	81.9%	68 min	2.24%	B
All carriers on BOS–IND	2,017	81.6%	68 min	2.23%	B
Republic Airways, whole network	361,482	78.5%	72 min	4.08%	B−

Across the year

YX 4725 quarter by quarter

Quarter by quarter YX 4725 held fairly steady: 92.8% in Jul–Sep 2025, 92.1% in Oct–Dec 2025, 85.4% in Jan–Mar 2026 and 90.0% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202587 flights92.8%
Oct–Dec 202589 flights92.1%
Jan–Mar 202687 flights85.4%
Apr–Jun 202650 flights90.0%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, YX 4725 did best on Friday at 95.6% on time and worst on Monday at 79.5%. Each day rests on about 45 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Delay causes

Why YX 4725 runs late

One category carries most of the weight here. Carrier accounts for 58% of the 1,566 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
58%
Late-arriving aircraft
27%
National Airspace System
16%

The largest share of delay minutes, 58%, 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 907 of the 1,566 delay minutes reported here. The split is drawn from 1,566 delay minutes reported on YX 4725.

Cancellations run at 2.88%, against 1.81% nationally. That is roughly one flight in 30 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

Badly late arrivals are rare here: only 3.0% 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.

The 818 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The same number turns up on four other city pairs in the data, including MIA to EYW (6), EYW to MIA (6) and ORD to RDU (2), but none flew often enough under YX 4725 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BOS to IND only.

One caution: this is a thin sample. 313 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 4725

For a booking, the cancellation rate is the figure to plan around on YX 4725: 2.88% of its 313 scheduled flights did not operate. A late arrival costs roughly 50 minutes, 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures