Flight number record
YX 3543
Republic Airways · Washington to Indianapolis
- Route
- IAD → IND
- Departs
- 12:45
- Flights
- 271
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 271 flights, with a median arrival 10 minutes early.
Set against the rest of the country, YX 3543's record is 8 points better than the US average of 77.3%. That gap is worth roughly 75 fewer late arrivals for every thousand flights.
Key figures
On time
84.8%
Arrivals under 15 minutes late, of 270 completed flights
Avg delay
60 min
Across delayed arrivals only, not all flights
Cancelled
0.37%
National rate is 1.89%
1 hour+ late
4.4%
National rate is 8.3%
These figures cover 271 flights between September 2025 and August 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.
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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 146 of 271 flights, with 12:47 (53 flights) and 12:35 (43 flights) next.
- Departs 12:45146 flights53.9%
- Departs 12:4753 flights19.6%
- Departs 12:3543 flights15.9%
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 12:45 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and YX 3543 runs 7 points better at 84.8%. 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 3543 next to IAD to IND
Every carrier on IAD to IND combined arrived on time 83.8% of the time across 984 flights, so YX 3543 is about level with it. Republic flew 935 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 78.1%, which this flight beats by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 3543thin sample | 271 | 84.8% | 60 min | 0.37% | B+ |
| All Republic Airways on IAD–IND | 935 | 84.3% | 93 min | 1.18% | B |
| All carriers on IAD–IND | 984 | 83.8% | 88 min | 1.12% | B |
| Republic Airways, whole network | 364,452 | 78.1% | 74 min | 4.55% | B− |
Across the year
YX 3543 quarter by quarter
Quarter by quarter YX 3543 held fairly steady: 86.7% 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 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights86.7%
- Oct–Dec 202591 flights81.1%
- Jan–Mar 202652 flights80.8%
- Apr–Jun 202680 flights88.8%
- Jul–Sep 202618 flights—
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, YX 3543 ranged from 80.0% on Sunday to 90.3% on Saturday. With about 39 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.
Arrival by arrival
How late YX 3543 runs when it is late
YX 3543 often beats the schedule: 94 of 270 completed flights, 35%, arrived 15 minutes or more early. The 41 late arrivals split 17 under half an hour, 12 between 30 and 60 minutes, and 12 an hour or more.
- 15+ min early94 flights34.8%
- Within 15 min135 flights50.0%
- 15–29 min late17 flights6.3%
- 30–59 min late12 flights4.4%
- 1–2 hours late8 flights3.0%
- 2+ hours late4 flights1.5%
Scale runs 0% to 100%.
Share of 270 completed flights by arrival against schedule.
5 of 30 late departures made up the time and arrived on time, 17% of them. 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 IND.
The worst days
Worst days for YX 3543
The latest arrival of the period was on 7 March 2026, 5 hours 46 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 March 2026 | 5 hours 46 minutes | Late-arriving aircraft |
| 22 October 2025 | 3 hours 52 minutes | Late-arriving aircraft |
| 6 November 2025 | 3 hours 15 minutes | Carrier |
| 11 December 2025 | 2 hours 15 minutes | Late-arriving aircraft |
| 16 March 2026 | 1 hour 50 minutes | Carrier |
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 2,441 reported delay minutes.
- 41%Late-arriving aircraft
- 39%Carrier
- 17%National Airspace System
- 2%Extreme weather
41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,441 reported delay minutes here, that single category outweighs weather by 21 to one. The split is drawn from 2,441 delay minutes reported on YX 3543.
Cancellations are rare at 0.37%, below the national 1.89% 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 4.4% land an hour or more behind schedule, against 8.3% 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 four other city pairs in the data, including CLT to IAD (50), BOS to IAD (37) 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. 271 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 84.8% on time with 0.37% cancelled over 271 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- IAD to IND, every carrier and departure
- IND to IAD, the return direction
- Republic Airways 3561 on the same route92.1%
- Washington Dulles International (IAD) delay statistics
- Indianapolis International (IND) delay statistics
- Republic Airways on-time record
- Every Republic Airways flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
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 ; recomputed monthly. How this data is collected.