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

Washington, DC (IAD) to Charleston, SC (CHS) flight delay odds

85.8% of 761 official scheduled IAD-to-CHS flights arrived on time; 7.5% arrived at least 30 minutes late and 1.2% 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 SIGNALLower disruption
85.8%arrived on time
7.5%30+ min late
1.2%cancelled
761scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.2%all scheduled flights
120+ minutes late2.2%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+2.2 mincompleted flights

Which departure time was most reliable for IAD to CHS?

Among qualifying IAD-to-CHS departure window results, Early morning had the highest on-time rate: 93.6% of 281 flights. Evening was lowest at 63.6% across 88 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning28193.6%1.8%0.0%
Afternoon36085.6%8.3%1.4%
Evening8863.6%20.5%4.5%

Which weekday was most reliable for IAD to CHS?

Among qualifying IAD-to-CHS weekday results, Wednesday had the highest on-time rate: 91.7% of 108 flights. Friday was lowest at 79.4% across 107 flights.

DayFlightsOn time30+ minCancelled
Monday11786.3%7.7%1.7%
Tuesday10489.4%8.7%0.0%
Wednesday10891.7%4.6%0.0%
Thursday10983.5%7.3%0.9%
Friday10779.4%8.4%0.9%
Saturday10486.5%6.7%1.9%
Sunday11283.9%8.9%2.7%

Which airline was most reliable for IAD to CHS?

Among qualifying IAD-to-CHS airline results, United Airlines had the highest on-time rate: 88.8% of 463 flights. Republic Airways was lowest at 81.2% across 298 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines46388.8%5.8%0.9%
Republic Airways29881.2%10.1%1.7%

Which month was most reliable for IAD to CHS?

Among qualifying IAD-to-CHS month results, September 2025 had the highest on-time rate: 94.0% of 50 flights. January 2026 was lowest at 71.9% across 57 flights.

MonthFlightsOn time30+ minCancelled
July 20256382.5%9.5%1.6%
August 20255887.9%1.7%0.0%
September 20255094.0%6.0%0.0%
October 20255192.2%3.9%0.0%
November 20256190.2%1.6%0.0%
December 20255773.7%15.8%1.8%
January 20265771.9%14.0%8.8%
February 20265390.6%9.4%0.0%
March 20269282.6%8.7%1.1%
April 20267888.5%7.7%0.0%
May 20268186.4%7.4%0.0%
June 20266091.7%3.3%1.7%

What drove IAD to CHS delay minutes?

Late aircraft was the largest recorded IAD-to-CHS delay category, accounting for 49.9% of 7,196 BTS-attributed delay minutes during July 2025–June 2026.

Airline30.2%
Late aircraft49.9%
National airspace17.7%
Weather2.3%
Security0.0%
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.