IAD to JST flight delays & on-time performance
Nonstop flights from Washington Dulles International Airport to John Murtha Johnstown Cambria County Airport · 119 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at IAD or JST right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Washington (IAD) to Johnstown (JST) arrived on time 76% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 3.6% were cancelled, and 16% arrived an hour or more late.
- SkyWest Airlines is the only airline reporting nonstop flights on this route.
- Saturday was the most reliable day to fly (82% on time) and Tuesday the least (68%).
- The largest source of delay minutes was late-arriving aircraft (39%).
Which airline is most on time from IAD to JST?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 76% | 3.6% | 43 min | 15.6% | 330 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
Not enough departures across different hours to compare.
Best day of the week
On-time arrival rate by day of departure.
- Monday81%5.8% cancelled
- Tuesday68%2.9% cancelled
- Wednesday70%1.9% cancelled
- Thursday77%3.9% cancelled
- Friday79%1.9% cancelled
- Saturday82%2.9% cancelled
- Sunday76%5.8% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft39%
- Extreme weather31%
- Airline (crew, maintenance, cleaning, fueling)28%
- Air traffic control & airport congestion3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather92%
- Airline (crew, maintenance, cleaning, fueling)8%
- Air traffic control & airport congestion0%
- Security0%
IAD to JST: common questions
- How often are IAD to JST flights on time?
- 76% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Washington to Johnstown cancelled?
- 3.6% of scheduled flights were cancelled (12 of 330).
- How long are typical delays?
- Across all flights the average arrival delay was 43 min (early arrivals count as zero). Flights that were late arrived 177 min behind schedule on average, and 15.6% of flights were an hour or more late.
- How long is taxi time at IAD?
- Flights on this route spent 26 min taxiing from the gate to takeoff on average.
Related routes
Return trip: JST to IAD — 74% on time
More flights from Washington
More flights to Johnstown
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: IAD → JST, nonstop flights by US airlines that report to the DOT. How we calculate this.