JST to IAD flight delays
Johnstown, PA (JST) Washington, VA (IAD) · 119 miles
703 flights · July 2024 – July 2026 · US Bureau of Transportation Statistics
78.22%
Arrived on time
Within 15 minutes of schedule
2.7%
Cancelled
Share of scheduled flights
177 min
When late, late by
Average across delayed arrivals
39 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In May it ran 51.1 points more punctual than in December — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
Cancellation, not delay, is the risk worth pricing here: 2.7% of scheduled flights never operated. A late flight still gets you there. A cancelled one leaves you rebooking, and on a route with few daily departures that can mean losing a day.
The shape of the lateness matters here. Flights on this route are not late often, but when they are late they are late by about 177 minutes — long enough to lose a connection or an evening. The on-time percentage looks reassuring and understates the consequence of being on the wrong flight.
Only SkyWest Airlines flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
Which airline should you fly on this route?
Over July 2024 – July 2026, SkyWest Airlines arrived on time most often on JST to IAD. Flights ran closest to schedule in May and worst in December.
Every airline on JST to IAD
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines | 703 | 78.22% | 2.7% | 177 min | C |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
IAD to JST Washington back to Johnstown 77.89% on time DOther routes from Johnstown
Common questions
Are flights from Johnstown to Washington usually delayed?
78.22% of flights on the JST to IAD route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is about the same as the average route in this record.
Which airlines fly from Johnstown to Washington?
Only SkyWest Airlines appears in the published record on this route, with 703 flights and 78.22% arriving on time.
How often are JST to IAD flights cancelled?
2.7% of scheduled flights did not operate — about 27 in every thousand. That is high enough that cancellation, not delay, is the risk worth planning around.
What is the best month to fly Johnstown to Washington?
May, when 95.5% of flights arrived on time. The worst was December at 44.4%.
When JST to IAD flights are late, how late are they?
About 177 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on JST to IAD during July 2024 – July 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →