Pittsburgh (PIT) to Washington (IAD): On-Time Performance
Data through July 2026
When you fly PIT to IAD matters as much as anything else about the booking: the route swung from 98% on-time in August 2024 to just 73% in January 2025. Across the full period the route averages 87% on-time against a national 78%. Morning departures also hold up better than evening ones (95% vs 84%), which matters most in the rough months.
- On-time
- 87%
- arrived <15 min late
- Avg delay
- 8 min
- completed flights
- Cancelled
- 1.3%
- Flights/day
- 3.4
- last 12 months
- Duration
- 1h 11m
- scheduled
- Distance
- 182 mi
Best airline from PIT to IAD
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 88% | 8 min | 1.4% | 1,660 |
| United Airlines | 87% | 11 min | 0.9% | 547 |
Monthly on-time trend
Best time to fly from PIT to IAD
Aim for departures around 6 a.m. (95% on-time); avoid 3 p.m. departures (73%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 86% | 8 min |
| Tuesday | 89% | 7 min |
| Wednesday | 87% | 7 min |
| Thursday | 90% | 9 min |
| Friday | 85% | 12 min |
| Saturdaybest | 93% | 5 min |
| Sunday | 85% | 9 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft41%
- Airline operations18%
- National airspace system38%
- Weather4%
Frequently asked questions
- How often are flights from PIT to IAD delayed?
- 13% of PIT–IAD flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 8 minutes.
- Which airline is most reliable from PIT to IAD?
- Republic Airways has the best on-time record on this route at 88%, based on 1,660 flights. 2 airlines flew PIT–IAD frequently enough to compare in this period.
- What is the best time of day to fly from PIT to IAD?
- Departures around 6 a.m. have the best record (95% on-time), while departures around 3 p.m. have the worst (73%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PIT to IAD?
- The scheduled PIT–IAD flight time averages 1h 11m over 182 miles. Actual arrival times vary — flights on this route land 15+ minutes late 13% of the time.
- How often are PIT to IAD flights cancelled?
- 1.3% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from PIT to IAD?
- January 2025 was the roughest month in this dataset, with only 73% of arrivals on time. The best was August 2024 at 98%. If your dates are flexible, that 24-point gap is worth planning around.
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Based on 2,207 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.