Carrier route record
YXIAD→PIT
Republic Airways · Washington to Pittsburgh
- Flights
- 696
- 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 IAD to PIT lands a B, 5 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 696 flights, with a median arrival 9 minutes early.
Set against the rest of the country, Republic's IAD to PIT record is 5 points better than the US average of 77.3%. That gap is worth roughly 46 fewer late arrivals for every thousand flights.
Key figures
On time
81.9%
Arrivals under 15 minutes late, of 678 completed flights
Avg delay
74 min
Across delayed arrivals only, not all flights
Cancelled
2.44%
National rate is 1.89%
Whole route
84.3%
Every carrier on IAD to PIT, 1,213 flights
These figures cover 696 flights between September 2025 and August 2026. The median arrival is 9 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 IAD to PIT
Republic flew 696 of the 1,213 flights on IAD to PIT, most of the route. Its 81.9% on time is 2 points worse than the route as a whole, which runs 84.3%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from United at 87.5% to Republic at 81.9%.
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 |
|---|---|---|---|---|---|
| United Airlines | 517 | 87.5% | 79 min | 0.77% | A+ |
| Republic Airways (this page) | 696 | 81.9% | 74 min | 2.44% | B |
Flight by flight
Republic flight numbers on IAD to PIT
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 14 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am33 flights87.5%
- 11am–2pm130 flights91.4%
- 2pm–5pm—
- 5pm–8pm169 flights77.8%
- 8pm–5am364 flights79.8%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
The best window here is not the first bank but the 11am–2pm slot at 91.4% on time, ahead of 5pm–8pm at 77.8%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 8pm–5am window is the busiest, with 364 flights scheduled in it.
Across the year
Republic on IAD to PIT through the year
August is the worst month at 69.5% on time, 26 points below April, the best at 95.1%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. December was the busiest month here, with 70 flights.
Across the week, Monday is the strongest day at 84.2% on time and Saturday the weakest at 79.3%, a spread of 5 points.
Arrival by arrival
How late Republic on IAD to PIT runs when it is late
Republic on IAD to PIT often beats the schedule: 205 of 678 completed flights, 30%, arrived 15 minutes or more early. The 123 late arrivals split 41 under half an hour, 38 between 30 and 60 minutes, and 44 an hour or more.
- 15+ min early205 flights30.2%
- Within 15 min350 flights51.6%
- 15–29 min late41 flights6.0%
- 30–59 min late38 flights5.6%
- 1–2 hours late18 flights2.7%
- 2+ hours late26 flights3.8%
Scale runs 0% to 100%.
Share of 678 completed flights by arrival against schedule.
16 of 116 late departures made up the time and arrived on time, 14% of them. 23 flights left on time and still arrived late.
The worst days
Worst days for Republic on IAD to PIT
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). The five worst days are spread across May, July, August, January and December, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 13 May 2026 | 10 hours 22 minutes | Carrier |
| 5 July 2026 | 5 hours 18 minutes | National Airspace System |
| 16 August 2026 | 4 hours 39 minutes | National Airspace System |
| 28 January 2026 | 4 hours 9 minutes | Late-arriving aircraft |
| 20 December 2025 | 4 hours | Late-arriving aircraft |
Delay causes
Why Republic runs late on this route
Late-arriving aircraft accounts for 47% of the 9,110 delay minutes carriers reported here, and the remaining four split what is left.
- 47%Late-arriving aircraft
- 34%Carrier
- 18%National Airspace System
- 1%Extreme weather
47% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 9,110 reported delay minutes here, that single category outweighs weather by 35 to one. The split is drawn from 9,110 reported delay minutes.
Cancellations sit at 2.44% against a national 1.89%, which is ordinary. Diversions add another 0.14%.
Connections and stage length
What a delay here costs
6.5% 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.
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 11am–2pm window matters as much as it does.
The return leg is a different operation and performs like one: it runs 89.4% on time across 693 flights, 8 points above 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. 696 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 IAD to PIT
Put together: treat all of this as provisional. 696 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 81.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 678 completed flights over 12 months sit behind that.
Related
Where to go next
- IAD to PIT, every carrier
- Republic on PIT to IAD, the return leg
- United Airlines on IAD to PIT87.5%
- Republic Airways network-wide record
- Washington Dulles International (IAD) delay statistics
- Pittsburgh International (PIT) 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.