Route · JST → IAD · 2020–2025 BTS data
Johnstown to Washington
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), JST to IAD (Johnstown to Washington) ranks #4127 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 85.3%
- On-time
- +6.3 pts
- vs US avg
- 142 min
- Delay when late
- 1,531
- Flights
- #4127 of 4927
- Corpus placement
Cancelled
1.6%
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 | 15 | 4 | 0 | OO |
| Nov 2025 | 30 | 10 | 0 | 0 | OO |
| Oct 2025 | 31 | 2 | 0 | 0 | OO |
| Sep 2025 | 30 | 5 | 0 | 0 | OO |
| Aug 2025 | 31 | 8 | 0 | 0 | OO |
| Jul 2025 | 31 | 3 | 0 | 0 | OO |
| Jun 2025 | 30 | 8 | 0 | 0 | OO |
| May 2025 | 31 | 3 | 0 | 0 | OO |
| Apr 2025 | 30 | 4 | 0 | 0 | OO |
| Mar 2025 | 31 | 2 | 0 | 0 | OO |
| Jan 2025 | 31 | 5 | 2 | 0 | OO |
| Dec 2024 | 31 | 8 | 0 | 0 | OO |
| Nov 2024 | 30 | 5 | 1 | 0 | OO |
| Oct 2024 | 31 | 6 | 0 | 0 | OO |
| Sep 2024 | 30 | 4 | 0 | 0 | OO |
| Aug 2024 | 31 | 5 | 0 | 0 | OO |
| Jul 2024 | 31 | 8 | 0 | 0 | OO |
| Jun 2024 | 30 | 6 | 0 | 0 | OO |
| May 2024 | 31 | 6 | 0 | 0 | OO |
| Apr 2024 | 30 | 8 | 0 | 0 | OO |
| Mar 2024 | 31 | 2 | 0 | 0 | OO |
| Jan 2024 | 31 | 7 | 5 | 0 | OO |
| Dec 2023 | 31 | 3 | 0 | 0 | OO |
| Nov 2023 | 30 | 3 | 0 | 0 | OO |
JST–IAD seasonal on-time pattern
Best: March (94.4%) · weakest: December (76.6%)
Strongest calendar month
March
94.4% on-time · ~31 flights/mo
Busiest calendar month
January
~31 flights/mo avg
Weakest calendar month
December
76.6% on-time · ~31 flights/mo
Cancellation Rate
1.6%
12 of 735 flights
Diversion Rate
0.0%
0 of 735 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
JST - Johnstown
Full on-time, delay-cause, and seasonal performance for Johnstown, PA.
JST on-time profileIAD - Washington
Full on-time, delay-cause, and seasonal performance for Washington, DC.
IAD on-time profileCompare the two airports
See JST and IAD side by side on delays, cancellations, and reliability.
Compare JST vs IADOrigin-hub reliability standing
Among JST's stronger departures
JST → IAD posts a 85.3% on-time rate, landing in the ≥85% band with 1 of 2 BTS-tracked routes leaving Johnstown. The same hub also shows 1 mid-band and 0 challenged departures · fleet-wide on-time rank #1118 of 4927 (highest on-time = #1).
Similar routes
Other BTS-tracked routes with comparable performance or trip length to JST–IAD.
Routes with a similar on-time rate
What the Data Says About JST to IAD
Johnstown to Washington (JST to IAD) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85.3% on-time rate across 1,531 flights, with delays that do happen averaging 141.5 minutes. The corridor runs roughly 120 miles and is served by 1 carrier. Over the most recent 24 months, 12 of 735 flights were cancelled (1.6%) and 0 diverted (0.0%).
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, JST–IAD peaks in March at 94.4% on-time while January carries the heaviest traffic (~31 flights per month) ; the softest month is December at 76.6%, a 17.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does JST to IAD rank among US routes by traffic? ▼
How often are flights delayed from JST to IAD? ▼
What is the cancellation rate for JST to IAD? ▼
How far is the flight from JST 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 JST–IAD data
JST–IAD runs 6.3 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare JST and IAD airport profiles: delay causes and top routes differ even on the same corridor. JST airport
- If your dates flex, March (94.4% on-time) beats December (76.6%) on this corridor. Seasonal chart
- 4 other routes post a similar 85.3% 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.