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

Seattle, WA (SEA) to Raleigh/Durham, NC (RDU) flight delay odds

77.7% of 919 official scheduled SEA-to-RDU flights arrived on time; 11.0% arrived at least 30 minutes late and 1.1% 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 SIGNALGenerally reliable
77.7%arrived on time
11.0%30+ min late
1.1%cancelled
919scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late3.9%all scheduled flights
120+ minutes late1.1%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+1.3 mincompleted flights

Which departure time was most reliable for SEA to RDU?

Among qualifying SEA-to-RDU departure window results, Late morning had the highest on-time rate: 84.9% of 238 flights. Night was lowest at 72.3% across 206 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning12677.8%11.1%0.0%
Late morning23884.9%6.3%0.8%
Afternoon34975.9%11.7%1.1%
Night20672.3%15.0%1.9%

Which weekday was most reliable for SEA to RDU?

Among qualifying SEA-to-RDU weekday results, Wednesday had the highest on-time rate: 84.4% of 122 flights. Monday was lowest at 72.1% across 136 flights.

DayFlightsOn time30+ minCancelled
Monday13672.1%14.0%0.7%
Tuesday12882.0%10.2%0.0%
Wednesday12284.4%9.8%0.0%
Thursday13276.5%10.6%0.8%
Friday13375.9%13.5%0.8%
Saturday13177.9%4.6%3.1%
Sunday13775.9%13.9%2.2%

Which airline was most reliable for SEA to RDU?

Among qualifying SEA-to-RDU airline results, Alaska Airlines had the highest on-time rate: 79.1% of 555 flights. Delta Air Lines was lowest at 75.5% across 364 flights.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines55579.1%10.6%0.9%
Delta Air Lines36475.5%11.5%1.4%

Which month was most reliable for SEA to RDU?

Among qualifying SEA-to-RDU month results, October 2025 had the highest on-time rate: 87.5% of 64 flights. July 2025 was lowest at 61.3% across 93 flights.

MonthFlightsOn time30+ minCancelled
July 20259361.3%20.4%1.1%
August 20258864.8%15.9%2.3%
September 20257775.3%9.1%0.0%
October 20256487.5%6.2%0.0%
November 20256777.6%16.4%0.0%
December 20257378.1%9.6%1.4%
January 20266683.3%6.1%6.1%
February 20265680.4%8.9%1.8%
March 20267181.7%14.1%1.4%
April 20268181.5%6.2%0.0%
May 20269381.7%9.7%0.0%
June 20269085.6%6.7%0.0%

What drove SEA to RDU delay minutes?

Airline was the largest recorded SEA-to-RDU delay category, accounting for 44.4% of 8,479 BTS-attributed delay minutes during July 2025–June 2026.

Airline44.4%
Late aircraft27.3%
National airspace26.9%
Weather1.4%
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.