Flight number record
YX 3540
Republic Airways · Washington to Pittsburgh
- Route
- IAD → PIT
- Departs
- 22:30
- Flights
- 334
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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, 2 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 334 flights, with a median arrival 8 minutes early.
Key figures
On time
79.2%
Arrivals under 15 minutes late, of 327 completed flights
Avg delay
71 min
Across delayed arrivals only, not all flights
Cancelled
2.10%
National rate is 1.89%
1 hour+ late
7.6%
National rate is 8.3%
These figures cover 334 flights between September 2025 and August 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.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When YX 3540 flies
YX 3540 flies IAD to PIT without a single fixed slot. Its most common scheduled departure was 22:30, used on 82 of 334 flights, with 22:10 (76 flights) and 22:20 (54 flights) next.
- Departs 22:3082 flights24.6%
- Departs 22:1076 flights22.8%
- Departs 22:2054 flights16.2%
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 22:30 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and YX 3540 runs 9 points better at 79.2%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
YX 3540 next to IAD to PIT
Every carrier on IAD to PIT combined arrived on time 84.3% of the time across 1,213 flights, so YX 3540 is 5 points behind it. Republic flew 696 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 78.1%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 3540thin sample | 334 | 79.2% | 71 min | 2.10% | B |
| All Republic Airways on IAD–PIT | 696 | 81.9% | 74 min | 2.44% | B |
| All carriers on IAD–PIT | 1,213 | 84.3% | 76 min | 1.73% | B |
| Republic Airways, whole network | 364,452 | 78.1% | 74 min | 4.55% | B− |
Across the year
YX 3540 quarter by quarter
YX 3540 did not run the same all year. Its best quarter was Jul–Sep 2025 at 86.7% on time and its weakest Jul–Sep 2026 at 68.4%, a swing of 18 points on roughly 67 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 202530 flights86.7%
- Oct–Dec 202561 flights78.7%
- Jan–Mar 202690 flights81.8%
- Apr–Jun 202691 flights81.3%
- Jul–Sep 202662 flights68.4%
Scale runs 60% to 90%.
By weekday, YX 3540 ranged from 76.6% on Friday to 83.0% on Tuesday. With about 48 flights behind each day, a spread of 6 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late YX 3540 runs when it is late
YX 3540 often beats the schedule: 92 of 327 completed flights, 28%, arrived 15 minutes or more early. The 68 late arrivals split 22 under half an hour, 21 between 30 and 60 minutes, and 25 an hour or more.
- 15+ min early92 flights28.1%
- Within 15 min167 flights51.1%
- 15–29 min late22 flights6.7%
- 30–59 min late21 flights6.4%
- 1–2 hours late13 flights4.0%
- 2+ hours late12 flights3.7%
Scale runs 0% to 100%.
Share of 327 completed flights by arrival against schedule.
9 of 68 late departures made up the time and arrived on time, 13% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for YX 3540
The latest arrival of the period was on 13 May 2026, 10 hours 22 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On four of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 13 May 2026 | 10 hours 22 minutes | Carrier |
| 22 August 2026 | 3 hours 21 minutes | Late-arriving aircraft |
| 29 December 2025 | 3 hours 6 minutes | Late-arriving aircraft |
| 8 June 2026 | 2 hours 57 minutes | Late-arriving aircraft |
| 2 March 2026 | 2 hours 53 minutes | Late-arriving aircraft |
Delay causes
Why YX 3540 runs late
Late-arriving aircraft accounts for 49% of the 4,809 delay minutes carriers reported here, and the remaining four split what is left.
- 49%Late-arriving aircraft
- 39%Carrier
- 9%National Airspace System
- 3%Extreme weather
49% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,809 reported delay minutes here, that single category outweighs weather by 19 to one. The split is drawn from 4,809 delay minutes reported on YX 3540.
Cancellations sit at 2.10% against a national 1.89%, 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 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, 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, YX 3540 is one of the weaker ways to fly IAD to PIT: 5 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
Related
Where to go next
- IAD to PIT, every carrier and departure
- PIT to IAD, the return direction
- Washington Dulles International (IAD) delay statistics
- Pittsburgh International (PIT) 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.