Route · IAD → JST · 2020–2025 BTS data
Washington to Johnstown
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), IAD to JST (Washington to Johnstown) ranks #4113 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 83.4%
- On-time
- +4.4 pts
- vs US avg
- 134 min
- Delay when late
- 1,559
- Flights
- #4113 of 4927
- Corpus placement
Cancelled
1.9%
Best Month
N/A
Worst Month
N/A
Distance
120 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 31 | 13 | 4 | 0 | OO |
| Nov 2025 | 30 | 10 | 0 | 0 | OO |
| Oct 2025 | 31 | 3 | 0 | 0 | OO |
| Sep 2025 | 30 | 4 | 0 | 0 | OO |
| Aug 2025 | 31 | 6 | 0 | 0 | OO |
| Jul 2025 | 31 | 9 | 0 | 0 | OO |
| Jun 2025 | 30 | 13 | 0 | 0 | OO |
| May 2025 | 31 | 3 | 0 | 0 | OO |
| Apr 2025 | 30 | 3 | 0 | 2 | OO |
| Mar 2025 | 31 | 5 | 0 | 1 | OO |
| Jan 2025 | 31 | 8 | 2 | 1 | OO |
| Dec 2024 | 31 | 7 | 0 | 1 | OO |
| Nov 2024 | 30 | 6 | 1 | 0 | OO |
| Oct 2024 | 31 | 6 | 0 | 0 | OO |
| Sep 2024 | 30 | 6 | 0 | 0 | OO |
| Aug 2024 | 31 | 5 | 0 | 0 | OO |
| Jul 2024 | 31 | 1 | 0 | 0 | OO |
| Jun 2024 | 30 | 6 | 0 | 0 | OO |
| May 2024 | 31 | 8 | 0 | 0 | OO |
| Apr 2024 | 30 | 8 | 0 | 1 | OO |
| Mar 2024 | 31 | 2 | 2 | 1 | OO |
| Jan 2024 | 31 | 10 | 5 | 0 | OO |
| Dec 2023 | 31 | 5 | 0 | 1 | OO |
| Nov 2023 | 30 | 3 | 0 | 0 | OO |
IAD–JST seasonal on-time pattern
Best: March (90.2%) · weakest: December (78.2%)
Strongest calendar month
March
90.2% on-time · ~31 flights/mo
Busiest calendar month
January
~31 flights/mo avg
Weakest calendar month
December
78.2% on-time · ~31 flights/mo
Cancellation Rate
1.9%
14 of 735 flights
Diversion Rate
1.1%
8 of 735 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
IAD - Washington
Full on-time, delay-cause, and seasonal performance for Washington, DC.
IAD on-time profileJST - Johnstown
Full on-time, delay-cause, and seasonal performance for Johnstown, PA.
JST on-time profileCompare the two airports
See IAD and JST side by side on delays, cancellations, and reliability.
Compare IAD vs JSTOrigin-hub reliability standing
Mid-pack among IAD departures
From IAD, this corridor sits with 42 other 75–85% on-time routes out of 58 tracked departures, not the hub's reliability leaders (14 at ≥85%) and not the softest ( 2 below 75%). Destination: Johnstown · fleet on-time rank #1792 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to IAD–JST.
Routes with a similar on-time rate
What the Data Says About IAD to JST
Bureau of Transportation Statistics records show Washington to Johnstown (IAD to JST) running a 83.4% on-time rate over 1,559 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 133.8 minutes. The 120-mile corridor is served by 1 carrier, and over the last 24 months 1.9% of 735 flights were cancelled, 1.1% diverted.
Monthly performance data for this route did not show a clear best/worst split in the sample window; review the monthly table above for period-by-period detail.
On the multi-year calendar, IAD–JST peaks in March at 90.2% on-time while January carries the heaviest traffic (~31 flights per month) ; the softest month is December at 78.2%, a 12.0-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does IAD to JST rank among US routes by traffic? ▼
How often are flights delayed from IAD to JST? ▼
What is the cancellation rate for IAD to JST? ▼
How far is the flight from IAD to JST? ▼
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 IAD–JST data
IAD–JST runs 4.4 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare IAD and JST airport profiles: delay causes and top routes differ even on the same corridor. IAD airport
- If your dates flex, March (90.2% on-time) beats December (78.2%) on this corridor. Seasonal chart
- 4 other routes post a similar 83.4% 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.