Flight number record

YX 4726

Republic Airways · Indianapolis to Boston

Route: IND → BOS
Departs: 18:55
Flights: 265
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s YX 4726, 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 4726 sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 10 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 265 flights, with a median arrival 5 minutes early.

The national on-time rate over the same period is 77.6%, so YX 4726 runs 10 points behind the country as a whole. Across a thousand flights that is about 95 extra late arrivals.

On time

68.1%

Arrivals under 15 minutes late, of 251 completed flights

Avg delay

75 min

Across delayed arrivals only, not all flights

Cancelled

5.28%

National rate is 1.81%

1 hour+ late

15.5%

National rate is 8.1%

These figures cover 265 flights between July 2025 and June 2026. Beyond the headline rate, 15.5% 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 4726 flies

YX 4726 flies IND to BOS without a single fixed slot. Its most common scheduled departure was 18:55, used on 54 of 265 flights, with 18:43 (38 flights) and 19:30 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 18:5554 flights20.4%
Departs 18:4338 flights14.3%
Departs 19:3037 flights14.0%

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 18:55 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and YX 4726 runs level with that at 68.1%. 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 4726 next to IND to BOS

Every carrier on IND to BOS combined arrived on time 78.2% of the time across 2,016 flights, so YX 4726 is 10 points behind it. Republic flew 1,961 flights on the same city pair under all its flight numbers, including this one, and those ran 78.2% on time. Across its whole network Republic Airways managed 78.5%, which this flight trails by 10 points.

YX 4726 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 4726thin sample	265	68.1%	75 min	5.28%	C−
All Republic Airways on IND–BOS	1,961	78.2%	67 min	2.60%	B
All carriers on IND–BOS	2,016	78.2%	67 min	2.58%	B
Republic Airways, whole network	361,482	78.5%	72 min	4.08%	B−

Across the year

YX 4726 quarter by quarter

YX 4726 did not run the same all year. Its best quarter was Jan–Mar 2026 at 74.2% on time and its weakest Jul–Sep 2025 at 59.2%, a swing of 15 points on roughly 66 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 202554 flights59.2%
Oct–Dec 202562 flights65.0%
Jan–Mar 202672 flights74.2%
Apr–Jun 202677 flights71.1%

Scale runs 50% to 80%. Rows with fewer than 30 flights show a dash.

By weekday, YX 4726 ranged from 64.1% on Monday to 74.4% on Friday. With about 38 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why YX 4726 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 54% of the 6,027 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.

Late-arriving aircraft
54%
National Airspace System
29%
Carrier
16%
Extreme weather
1%

54% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 6,027 reported delay minutes here, that single category outweighs weather by 38 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 6,027 delay minutes reported on YX 4726.

Cancellations run at 5.28%, against 1.81% nationally. That is about one flight in twenty 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. 15.5% 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.

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 three other city pairs in the data, including BOS to IND (63), BUF to DCA (16) and DCA to ROC (5), but none flew often enough under YX 4726 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IND to BOS only.

One caution: this is a thin sample. 265 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 4726

For a booking, the cancellation rate is the figure to plan around on YX 4726: 5.28% of its 265 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures