Flight number record

YX 3540

Republic Airways · Washington to Pittsburgh

Route: IAD → PIT
Departs: 22:10
Flights: 334
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s YX 3540, 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 3540 lands a B, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 334 flights, with a median arrival 8 minutes early.

On time

80.6%

Arrivals under 15 minutes late, of 330 completed flights

Avg delay

84 min

Across delayed arrivals only, not all flights

Cancelled

1.20%

National rate is 1.81%

1 hour+ late

7.6%

National rate is 8.1%

These figures cover 334 flights between July 2025 and June 2026. The median arrival is 8 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 3540 flies

YX 3540 flies IAD to PIT without a single fixed slot. Its most common scheduled departure was 22:10, used on 89 of 334 flights, with 22:05 (53 flights) and 22:09 (49 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 22:1089 flights26.6%
Departs 22:0553 flights15.9%
Departs 22:0949 flights14.7%

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 22:10 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and YX 3540 runs 10 points better at 80.6%. 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 3540 next to IAD to PIT

Every carrier on IAD to PIT combined arrived on time 84.5% of the time across 1,268 flights, so YX 3540 is 4 points behind it. Republic flew 769 flights on the same city pair under all its flight numbers, including this one, and those ran 82.7% on time. Across its whole network Republic Airways managed 78.5%, which this flight beats by 2 points.

YX 3540 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 3540thin sample	334	80.6%	84 min	1.20%	B
All Republic Airways on IAD–PIT	769	82.7%	81 min	1.95%	B
All carriers on IAD–PIT	1,268	84.5%	79 min	1.50%	B
Republic Airways, whole network	361,482	78.5%	72 min	4.08%	B−

Across the year

YX 3540 quarter by quarter

Quarter by quarter YX 3540 held fairly steady: 80.0% in Jul–Sep 2025, 78.7% in Oct–Dec 2025, 81.8% in Jan–Mar 2026 and 81.3% in Apr–Jun 2026. A spread of 3 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights80.0%
Oct–Dec 202561 flights78.7%
Jan–Mar 202690 flights81.8%
Apr–Jun 202691 flights81.3%

Scale runs 70% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, YX 3540 did best on Tuesday at 87.5% on time and worst on Sunday at 73.9%. Each day rests on about 48 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Delay causes

Why YX 3540 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 59% of the 5,341 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
59%
Carrier
33%
National Airspace System
6%
Extreme weather
1%

59% 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 5,341 reported delay minutes here, that single category outweighs weather by 46 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 5,341 delay minutes reported on YX 3540.

Cancellations sit at 1.20% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

7.6% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.

The same number turns up on two other city pairs in the data, including ILM to EWR (27) and LGA to IAD (19), but none flew often enough under YX 3540 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAD to PIT only.

One caution: this is a thin sample. 334 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 3540

For a booking, read YX 3540 as 80.6% on time with 1.20% cancelled over 334 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