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

Seattle, WA (SEA) to Atlanta, GA (ATL) flight delay odds

82.0% of 3,276 official scheduled SEA-to-ATL flights arrived on time; 10.3% arrived at least 30 minutes late and 0.5% 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
82.0%arrived on time
10.3%30+ min late
0.5%cancelled
3,276scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.6%all scheduled flights
120+ minutes late2.4%all scheduled flights
Diverted0.4%did not reach as scheduled
Average arrival+3.5 mincompleted flights

Which departure time was most reliable for SEA to ATL?

Among qualifying SEA-to-ATL departure window results, Early morning had the highest on-time rate: 88.9% of 826 flights. Evening was lowest at 76.9% across 52 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning82688.9%7.4%0.5%
Late morning66178.7%13.2%0.3%
Afternoon83878.6%12.5%0.6%
Evening5276.9%11.5%0.0%
Night89981.6%8.8%0.8%

Which weekday was most reliable for SEA to ATL?

Among qualifying SEA-to-ATL weekday results, Wednesday had the highest on-time rate: 87.1% of 458 flights. Sunday was lowest at 78.4% across 486 flights.

DayFlightsOn time30+ minCancelled
Monday47279.7%13.8%0.8%
Tuesday45786.4%8.1%0.0%
Wednesday45887.1%6.1%0.4%
Thursday47583.2%8.0%0.2%
Friday47778.6%13.2%1.0%
Saturday45181.2%11.3%0.7%
Sunday48678.4%11.5%0.6%

Which airline was most reliable for SEA to ATL?

Among qualifying SEA-to-ATL airline results, Delta Air Lines had the highest on-time rate: 83.0% of 2,371 flights. Alaska Airlines was lowest at 79.3% across 905 flights.

AirlineFlightsOn time30+ minCancelled
Delta Air Lines2,37183.0%10.1%0.5%
Alaska Airlines90579.3%10.9%0.7%

Which month was most reliable for SEA to ATL?

Among qualifying SEA-to-ATL month results, February 2026 had the highest on-time rate: 90.6% of 191 flights. July 2025 was lowest at 68.9% across 347 flights.

MonthFlightsOn time30+ minCancelled
July 202534768.9%17.3%0.3%
August 202531678.8%9.8%0.3%
September 202528490.1%4.9%0.0%
October 202529583.7%9.5%1.0%
November 202525685.9%7.8%0.4%
December 202526978.1%15.2%1.5%
January 202621385.4%10.3%0.9%
February 202619190.6%4.7%0.5%
March 202623178.4%12.1%1.3%
April 202625184.9%6.8%0.8%
May 202629882.6%10.1%0.0%
June 202632583.4%11.7%0.0%

What drove SEA to ATL delay minutes?

Airline was the largest recorded SEA-to-ATL delay category, accounting for 57.3% of 40,854 BTS-attributed delay minutes during July 2025–June 2026.

Airline57.3%
Late aircraft22.5%
National airspace15.2%
Weather5.0%
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.