JST to IAD flight delays & on-time performance
Nonstop flights from John Murtha Johnstown Cambria County Airport to Washington Dulles International Airport · 119 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at JST or IAD right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Johnstown (JST) to Washington (IAD) arrived on time 74% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 3.3% were cancelled, and 19% 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 (86% on time) and Tuesday the least (65%).
- The largest source of delay minutes was late-arriving aircraft (45%).
Which airline is most on time from JST to IAD?
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. | 74% | 3.3% | 50 min | 18.8% | 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.
- Monday67%7.7% cancelled
- Tuesday65%2.9% cancelled
- Wednesday71%1.9% cancelled
- Thursday80%0.0% cancelled
- Friday75%3.8% cancelled
- Saturday86%0.0% 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 aircraft45%
- Airline (crew, maintenance, cleaning, fueling)35%
- Extreme weather14%
- Air traffic control & airport congestion6%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather91%
- Airline (crew, maintenance, cleaning, fueling)9%
- Air traffic control & airport congestion0%
- Security0%
JST to IAD: common questions
- How often are JST to IAD flights on time?
- 74% 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 Johnstown to Washington cancelled?
- 3.3% of scheduled flights were cancelled (11 of 330).
- How long are typical delays?
- Across all flights the average arrival delay was 50 min (early arrivals count as zero). Flights that were late arrived 189 min behind schedule on average, and 18.8% of flights were an hour or more late.
- How long is taxi time at JST?
- Flights on this route spent 23 min taxiing from the gate to takeoff on average.
Related routes
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: JST → IAD, nonstop flights by US airlines that report to the DOT. How we calculate this.