IAD to JST flight delays
Washington, VA (IAD) Johnstown, PA (JST) · 119 miles
703 flights · July 2024 – July 2026 · US Bureau of Transportation Statistics
77.89%
Arrived on time
Within 15 minutes of schedule
2.84%
Cancelled
Share of scheduled flights
156 min
When late, late by
Average across delayed arrivals
35 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In July it ran 44.9 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: 2.84% 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.
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.
The Washington to Johnstown route sits close to the middle of the record — neither notably punctual nor notably late.
Which airline should you fly on this route?
Over July 2024 – July 2026, SkyWest Airlines arrived on time most often on IAD to JST. Flights ran closest to schedule in April and worst in December.
Every airline on IAD to JST
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 | 77.89% | 2.84% | 156 min | D |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
JST to IAD Johnstown back to Washington 78.22% on time DOther routes from Washington
Common questions
Are flights from Washington to Johnstown usually delayed?
77.89% of flights on the IAD to JST 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 Washington to Johnstown?
Only SkyWest Airlines appears in the published record on this route, with 703 flights and 77.89% arriving on time.
How often are IAD to JST flights cancelled?
2.84% of scheduled flights did not operate — about 28 in every thousand. That is high enough that cancellation, not delay, is the risk worth planning around.
What is the best month to fly Washington to Johnstown?
July, when 96.8% of flights arrived on time. The worst was December at 51.9%.
When IAD to JST flights are late, how late are they?
About 156 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 IAD to JST 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 →