Carrier route record
YXIAD→PIT
Republic Airways · Washington to Pittsburgh
- Flights
- 769
- Period
- July 2025 to June 2026
- Share of route
- 61%
- Carriers
- 2
Historical statistics for July 2025 to June 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 77.6%. 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 is a workable record, not a spotless one. That rests on 769 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 77.6%. That gap is worth roughly 51 fewer late arrivals for every thousand flights.
Key figures
On time
82.7%
Arrivals under 15 minutes late, of 753 completed flights
Avg delay
81 min
Across delayed arrivals only, not all flights
Cancelled
1.95%
National rate is 1.81%
Whole route
84.5%
Every carrier on IAD to PIT, 1,268 flights
These figures cover 769 flights between July 2025 and June 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.
Carrier by carrier
Republic against every carrier on IAD to PIT
Republic flew 769 of the 1,268 flights on IAD to PIT, most of the route. Its 82.7% on time is 2 points worse than the route as a whole, which runs 84.5%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from United at 87.2% to Republic at 82.7%.
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 | 499 | 87.2% | 76 min | 0.80% | A+ |
| Republic Airways (this page) | 769 | 82.7% | 81 min | 1.95% | B |
Flight by flight
Republic flight numbers on IAD to PIT
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 13 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am—
- 8am–11am33 flights87.5%
- 11am–2pm185 flights90.7%
- 2pm–5pm30 flights—
- 5pm–8pm157 flights78.0%
- 8pm–5am364 flights81.1%
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 90.7% on time, ahead of 5pm–8pm at 78.0%. 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
June 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. July was the busiest month here, with 119 flights.
Across the week, Tuesday is the strongest day at 86.5% on time and Sunday the weakest at 77.4%. 9 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Republic runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 51% of the 11,000 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.
- 51%Late-arriving aircraft
- 31%Carrier
- 10%National Airspace System
- 8%Extreme weather
51% 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 11,000 reported delay minutes here, that single category outweighs weather by 6 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 10,555 reported delay minutes.
Cancellations sit at 1.95% against a national 1.81%, which is ordinary. Diversions add another 0.13%.
Connections and stage length
What a delay here costs
6.8% 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 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 88.4% on time across 767 flights, 6 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 6 points of difference.
One caution: this is a thin sample. 769 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. 769 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 82.7% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 753 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 PIT87.2%
- 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 7.04 million flight records
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.