Carrier route record
YXPIT→IAD
Republic Airways · Pittsburgh to Washington
- Flights
- 693
- Period
- September 2025 to August 2026
- Share of route
- 57%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Republic Airways.
Republic on PIT to IAD earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 693 flights, with a median arrival 15 minutes early.
Set against the rest of the country, Republic's PIT to IAD record is 12 points better than the US average of 77.3%. That gap is worth roughly 121 fewer late arrivals for every thousand flights.
Key figures
On time
89.4%
Arrivals under 15 minutes late, of 680 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
1.88%
National rate is 1.89%
Whole route
87.9%
Every carrier on PIT to IAD, 1,210 flights
These figures cover 693 flights between September 2025 and August 2026. The median arrival is 15 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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Carrier by carrier
Republic against every carrier on PIT to IAD
Republic flew 693 of the 1,210 flights on PIT to IAD, most of the route. Its 89.4% on time is 2 points better than the route as a whole, which runs 87.9%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Republic at 89.4% to United at 86.0%.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Republic Airways (this page) | 693 | 89.4% | 55 min | 1.88% | A |
| United Airlines | 517 | 86.0% | 77 min | 0.77% | A+ |
Flight by flight
Republic flight numbers on PIT to IAD
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.
Departure window
When Republic runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 20 points, against half a point between the best and worst carrier.
- 5am–8am360 flights96.9%
- 8am–11am35 flights91.4%
- 11am–2pm—
- 2pm–5pm131 flights76.9%
- 5pm–8pm—
- 8pm–5am167 flights82.3%
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 96.9% of the time, against 76.9% for the afternoon window. That is 20 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 360 flights scheduled in it.
Across the year
Republic on PIT to IAD through the year
Delays peak in October, when the on-time rate falls to 81.0%. March is the strongest month at 96.6%. Moving a flexible trip across that boundary buys 16 points. December was the busiest month here, with 70 flights.
Across the week, Saturday is the strongest day at 96.3% on time and Sunday the weakest at 87.3%, a spread of 9 points.
Arrival by arrival
How late Republic on PIT to IAD runs when it is late
Republic on PIT to IAD often beats the schedule: 343 of 680 completed flights, 50%, arrived 15 minutes or more early. The 72 late arrivals split 33 under half an hour, 13 between 30 and 60 minutes, and 26 an hour or more.
- 15+ min early343 flights50.4%
- Within 15 min265 flights39.0%
- 15–29 min late33 flights4.9%
- 30–59 min late13 flights1.9%
- 1–2 hours late19 flights2.8%
- 2+ hours late7 flights1.0%
Scale runs 0% to 100%.
Share of 680 completed flights by arrival against schedule.
16 of 55 late departures made up the time and arrived on time, 29% of them. 33 flights left on time and still arrived late.
The worst days
Worst days for Republic on PIT to IAD
The latest arrival of the period was on 11 June 2026, 5 hours 37 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across June, July, December and May, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 11 June 2026 | 5 hours 37 minutes | Late-arriving aircraft |
| 17 July 2026 | 3 hours 21 minutes | Carrier |
| 31 December 2025 | 3 hours 2 minutes | Carrier |
| 6 July 2026 | 2 hours 25 minutes | National Airspace System |
| 22 May 2026 | 2 hours 24 minutes | Late-arriving aircraft |
Delay causes
Why Republic runs late on this route
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 3,983 reported delay minutes.
- 40%Late-arriving aircraft
- 34%National Airspace System
- 25%Carrier
- 1%Extreme weather
40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,983 reported delay minutes here, that single category outweighs weather by 38 to one. The split is drawn from 3,983 reported delay minutes.
34% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 1,372 minutes out of 3,983, against a national NAS share of 21%.
Cancellations sit at 1.88% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 3.8% 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.
At 182 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5am–8am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 81.9% on time across 696 flights, 8 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 8 points of difference.
One caution: this is a thin sample. 693 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 Republic on PIT to IAD
Put together: treat all of this as provisional. 693 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 89.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 680 completed flights over 12 months sit behind that.
Related
Where to go next
- PIT to IAD, every carrier
- Republic on IAD to PIT, the return leg
- United Airlines on PIT to IAD86.0%
- Republic Airways network-wide record
- Pittsburgh International (PIT) delay statistics
- Washington Dulles International (IAD) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
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.