BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
JST→IAD

Johnstown, PA (JST) to Washington, DC (IAD) flight delay odds

72.5% of 338 official scheduled JST-to-IAD flights arrived on time; 21.0% arrived at least 30 minutes late and 3.3% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALVariable
72.5%arrived on time
21.0%30+ min late
3.3%cancelled
338scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late17.8%all scheduled flights
120+ minutes late14.5%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+36.4 mincompleted flights

Which departure time was most reliable for JST to IAD?

Only Early morning met the JST-to-IAD departure window threshold: 72.4% of 337 scheduled flights arrived on time during July 2025–June 2026.

Departure windowFlightsOn time30+ minCancelled
Early morning33772.4%21.1%3.3%

Which weekday was most reliable for JST to IAD?

Among qualifying JST-to-IAD weekday results, Saturday had the highest on-time rate: 87.2% of 39 flights. Monday was lowest at 61.5% across 52 flights.

DayFlightsOn time30+ minCancelled
Monday5261.5%25.0%7.7%
Tuesday4062.5%27.5%2.5%
Wednesday5273.1%23.1%1.9%
Thursday5180.4%15.7%0.0%
Friday5275.0%19.2%3.8%
Saturday3987.2%10.3%0.0%
Sunday5269.2%25.0%5.8%

Which airline was most reliable for JST to IAD?

Only SkyWest Airlines met the JST-to-IAD airline threshold: 72.5% of 338 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines33872.5%21.0%3.3%

Which month was most reliable for JST to IAD?

Among qualifying JST-to-IAD month results, May 2026 had the highest on-time rate: 95.5% of 22 flights. December 2025 was lowest at 38.7% across 31 flights.

MonthFlightsOn time30+ minCancelled
July 20253190.3%9.7%0.0%
August 20253174.2%19.4%0.0%
September 20253083.3%10.0%0.0%
October 20253193.5%6.5%0.0%
November 20253066.7%30.0%0.0%
December 20253138.7%35.5%12.9%
January 20263066.7%23.3%10.0%
February 20262864.3%35.7%0.0%
March 20263151.6%35.5%9.7%
April 20262263.6%27.3%4.5%
May 20262295.5%4.5%0.0%
June 20262190.5%9.5%0.0%

What drove JST to IAD delay minutes?

Late aircraft was the largest recorded JST-to-IAD delay category, accounting for 41.8% of 15,458 BTS-attributed delay minutes during July 2025–June 2026.

Airline37.6%
Late aircraft41.8%
National airspace6.8%
Weather13.7%
Security0.1%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.