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

Seattle, WA (SEA) to Charleston, SC (CHS) flight delay odds

84.4% of 347 official scheduled SEA-to-CHS flights arrived on time; 8.4% arrived at least 30 minutes late and 0.3% 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 SIGNALLower disruption
84.4%arrived on time
8.4%30+ min late
0.3%cancelled
347scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late2.9%all scheduled flights
120+ minutes late0.6%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival-5.2 mincompleted flights

Which departure time was most reliable for SEA to CHS?

Among qualifying SEA-to-CHS departure window results, Late morning had the highest on-time rate: 90.1% of 233 flights. Early morning was lowest at 72.8% across 114 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning11472.8%15.8%0.0%
Late morning23390.1%4.7%0.4%

Which weekday was most reliable for SEA to CHS?

Among qualifying SEA-to-CHS weekday results, Tuesday had the highest on-time rate: 88.6% of 44 flights. Sunday was lowest at 80.8% across 52 flights.

DayFlightsOn time30+ minCancelled
Monday5284.6%11.5%0.0%
Tuesday4488.6%4.5%0.0%
Wednesday5284.6%7.7%0.0%
Thursday5188.2%3.9%0.0%
Friday5280.8%11.5%1.9%
Saturday4484.1%0.0%0.0%
Sunday5280.8%17.3%0.0%

Which airline was most reliable for SEA to CHS?

Only Alaska Airlines met the SEA-to-CHS airline threshold: 84.4% of 347 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines34784.4%8.4%0.3%

Which month was most reliable for SEA to CHS?

Among qualifying SEA-to-CHS month results, February 2026 had the highest on-time rate: 100.0% of 25 flights. July 2025 was lowest at 51.6% across 31 flights.

MonthFlightsOn time30+ minCancelled
July 20253151.6%29.0%0.0%
August 20253177.4%6.5%0.0%
September 20253076.7%16.7%0.0%
October 20253083.3%6.7%3.3%
November 20252382.6%13.0%0.0%
December 20253187.1%3.2%0.0%
January 20262487.5%4.2%0.0%
February 202625100.0%0.0%0.0%
March 20263193.5%0.0%0.0%
April 20263096.7%3.3%0.0%
May 20263193.5%6.5%0.0%
June 20263086.7%10.0%0.0%

What drove SEA to CHS delay minutes?

Airline was the largest recorded SEA-to-CHS delay category, accounting for 41.4% of 2,215 BTS-attributed delay minutes during July 2025–June 2026.

Airline41.4%
Late aircraft26.0%
National airspace31.3%
Weather1.3%
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.