Route · PIT → IAD · 2020–2025 BTS data
Pittsburgh to Washington
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), PIT to IAD (Pittsburgh to Washington) ranks #2391 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 89.8%
- On-time
- +10.8 pts
- vs US avg
- 74 min
- Delay when late
- 5,240
- Flights
- #2391 of 4927
- Corpus placement
Cancelled
0.7%
Best Month
Sep 2024 94%
Worst Month
Jan 2025 74%
Distance
182 mi
Carriers
8
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 102 | 12 | 0 | 0 | YX,UA |
| Nov 2025 | 108 | 10 | 0 | 0 | UA,YX |
| Oct 2025 | 111 | 17 | 0 | 0 | UA,YX |
| Sep 2025 | 111 | 9 | 0 | 0 | UA,YX |
| Aug 2025 | 105 | 12 | 0 | 0 | YX,UA |
| Jul 2025 | 129 | 22 | 9 | 0 | UA,YX |
| Jun 2025 | 99 | 17 | 0 | 0 | YX |
| May 2025 | 110 | 16 | 0 | 0 | UA,YX |
| Apr 2025 | 129 | 13 | 0 | 0 | YX |
| Mar 2025 | 45 | 4 | 0 | 0 | YX |
| Feb 2025 | 61 | 10 | 0 | 0 | YX |
| Jan 2025 | 62 | 16 | 2 | 0 | YX |
| Dec 2024 | 63 | 13 | 0 | 0 | YX |
| Nov 2024 | 81 | 7 | 0 | 0 | YX |
| Oct 2024 | 64 | 8 | 0 | 0 | YX |
| Sep 2024 | 54 | 3 | 0 | 0 | YX |
| Aug 2024 | 41 | 1 | 1 | 0 | YX |
| Jul 2024 | 44 | 5 | 0 | 0 | YX |
| Jun 2024 | 30 | 2 | 0 | 0 | YX |
| May 2024 | 51 | 5 | 0 | 0 | YX |
| Apr 2024 | 52 | 3 | 0 | 0 | UA,YX |
| Mar 2024 | 72 | 6 | 0 | 0 | YX,UA |
| Feb 2024 | 50 | 0 | 0 | 0 | UA,YX |
| Jan 2024 | 53 | 7 | 0 | 0 | YX,UA |
PIT–IAD seasonal on-time pattern
Best: September (93.9%) · weakest: July (84.6%)
Strongest calendar month
September
93.9% on-time · ~79 flights/mo
Busiest calendar month
October
~87 flights/mo avg
Weakest calendar month
July
84.6% on-time · ~82 flights/mo
Cancellation Rate
0.7%
12 of 1,827 flights
Diversion Rate
0.0%
0 of 1,827 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
PIT - Pittsburgh
Full on-time, delay-cause, and seasonal performance for Pittsburgh, PA.
PIT on-time profileIAD - Washington
Full on-time, delay-cause, and seasonal performance for Washington, DC.
IAD on-time profileCompare the two airports
See PIT and IAD side by side on delays, cancellations, and reliability.
Compare PIT vs IADOrigin-hub reliability standing
Among PIT's stronger departures
PIT → IAD posts a 89.8% on-time rate, landing in the ≥85% band with 13 of 33 BTS-tracked routes leaving Pittsburgh. The same hub also shows 19 mid-band and 1 challenged departures · fleet-wide on-time rank #162 of 4927 (highest on-time = #1).
Similar routes
Other BTS-tracked routes with comparable performance or trip length to PIT–IAD.
Routes with a similar on-time rate
What the Data Says About PIT to IAD
Pittsburgh to Washington (PIT to IAD) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 89.8% on-time rate across 5,240 flights, with delays that do happen averaging 74.2 minutes. The corridor runs roughly 182 miles and is served by 8 carriers. Over the most recent 24 months, 12 of 1,827 flights were cancelled (0.7%) and 0 diverted (0.0%).
The monthly split is wide on this route: Sep 2024 posted the strongest performance at 94% on-time, while Jan 2025 came in at just 74% - a 20-point swing worth factoring into travel timing.
On the multi-year calendar, PIT–IAD peaks in September at 93.9% on-time while October carries the heaviest traffic (~87 flights per month) ; the softest month is July at 84.6%, a 9.3-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does PIT to IAD rank among US routes by traffic? ▼
How often are flights delayed from PIT to IAD? ▼
What is the cancellation rate for PIT to IAD? ▼
How far is the flight from PIT to IAD? ▼
When is the best time to fly from PIT to IAD? ▼
Airports on this route
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Using PIT–IAD data
PIT–IAD runs 10.8 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare PIT and IAD airport profiles: delay causes and top routes differ even on the same corridor. PIT airport
- If your dates flex, September (93.9% on-time) beats July (84.6%) on this corridor. Seasonal chart
- 4 other routes post a similar 89.8% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.