Carrier route record
YXPIT→IAD
Republic Airways · Pittsburgh to Washington
- Flights
- 767
- 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 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 11 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 50 minutes. That rests on 767 flights, with a median arrival 13 minutes early.
Set against the rest of the country, Republic's PIT to IAD record is 11 points better than the US average of 77.6%. That gap is worth roughly 108 fewer late arrivals for every thousand flights.
Key figures
On time
88.4%
Arrivals under 15 minutes late, of 753 completed flights
Avg delay
50 min
Across delayed arrivals only, not all flights
Cancelled
1.83%
National rate is 1.81%
Whole route
88.3%
Every carrier on PIT to IAD, 1,266 flights
These figures cover 767 flights between July 2025 and June 2026. The median arrival is 13 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 PIT to IAD
Republic flew 767 of the 1,266 flights on PIT to IAD, most of the route. Its 88.4% on time is about level with the route as a whole at 88.3%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Republic at 88.4% to United at 88.1%.
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) | 767 | 88.4% | 50 min | 1.83% | A |
| United Airlines | 499 | 88.1% | 72 min | 0.80% | A+ |
Flight by flight
Republic flight numbers on PIT to IAD
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 26 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–8am360 flights97.8%
- 8am–11am35 flights91.4%
- 11am–2pm30 flights—
- 2pm–5pm186 flights72.1%
- 5pm–8pm—
- 8pm–5am156 flights85.2%
Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 97.8% of the time, against 72.1% for the afternoon window. That is 26 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
July is the worst month at 80.2% on time, 16 points below March, the best at 96.6%. 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, Saturday is the strongest day at 98.9% on time and Sunday the weakest at 84.3%. 15 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. National Airspace System accounts for 49% of the 4,353 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.
- 49%National Airspace System
- 29%Late-arriving aircraft
- 17%Carrier
- 4%Extreme weather
49% 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 2,147 minutes out of 4,353, against a national NAS share of 21%. The split is drawn from 4,353 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 97.8% on time here.
Cancellations sit at 1.83% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 2.9% land an hour or more behind schedule, against 8.1% 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 82.7% on time across 769 flights, 6 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 6 points of difference.
One caution: this is a thin sample. 767 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. 767 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 88.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 753 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 IAD88.1%
- Republic Airways network-wide record
- Pittsburgh International (PIT) delay statistics
- Washington Dulles International (IAD) delay statistics
- The best time of day to fly, according to 7.04 million flight records
- Worst months to fly in the US, ranked by the data
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.