Flight number record

YX 3543

Republic Airways · Washington to Indianapolis

Route: IAD → IND
Departs: 12:45
Flights: 315
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s YX 3543, 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 3543 lands a B+, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 315 flights, with a median arrival 10 minutes early.

Set against the rest of the country, YX 3543's record is 5 points better than the US average of 77.6%. That gap is worth roughly 51 fewer late arrivals for every thousand flights.

On time

82.7%

Arrivals under 15 minutes late, of 313 completed flights

Avg delay

60 min

Across delayed arrivals only, not all flights

Cancelled

0.32%

National rate is 1.81%

1 hour+ late

4.5%

National rate is 8.1%

These figures cover 315 flights between July 2025 and June 2026. The median arrival is 10 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 3543 flies

YX 3543 flies IAD to IND without a single fixed slot. Its most common scheduled departure was 12:45, used on 159 of 315 flights, with 12:35 (88 flights) and 12:47 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 12:45159 flights50.5%
Departs 12:3588 flights27.9%
Departs 12:4735 flights11.1%

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 12:45 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and YX 3543 runs 4 points better at 82.7%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

YX 3543 next to IAD to IND

Every carrier on IAD to IND combined arrived on time 83.8% of the time across 992 flights, so YX 3543 is about level with it. Republic flew 943 flights on the same city pair under all its flight numbers, including this one, and those ran 84.3% on time. Across its whole network Republic Airways managed 78.5%, which this flight beats by 4 points.

YX 3543 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 3543thin sample	315	82.7%	60 min	0.32%	B+
All Republic Airways on IAD–IND	943	84.3%	90 min	1.06%	B
All carriers on IAD–IND	992	83.8%	85 min	1.01%	B
Republic Airways, whole network	361,482	78.5%	72 min	4.08%	B−

Across the year

YX 3543 quarter by quarter

Quarter by quarter YX 3543 held fairly steady: 80.2% in Jul–Sep 2025, 81.1% in Oct–Dec 2025, 80.8% in Jan–Mar 2026 and 88.8% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights80.2%
Oct–Dec 202591 flights81.1%
Jan–Mar 202652 flights80.8%
Apr–Jun 202680 flights88.8%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, YX 3543 did best on Wednesday at 88.9% on time and worst on Sunday at 76.1%. Each day rests on about 45 flights, so a gap of 13 points is worth noticing but could still narrow in another year.

Delay causes

Why YX 3543 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 3,224 reported delay minutes.

Carrier
42%
Late-arriving aircraft
41%
National Airspace System
16%
Extreme weather
1%

41% 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 3,224 reported delay minutes here, that single category outweighs weather by 28 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 3,224 delay minutes reported on YX 3543.

Cancellations are rare at 0.32%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 4.5% 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 same number turns up on three other city pairs in the data, including CLT to IAD (50), EWR to CHS (5) and EWR to SRQ (5), but none flew often enough under YX 3543 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAD to IND only.

One caution: this is a thin sample. 315 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 3543

For a booking, read YX 3543 as 82.7% on time with 0.32% cancelled over 315 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