Historical on-time performance
Seattle to Atlanta
2,182 miData through Dec 2025Source: US DOT · BTS
Flights on SEA–ATL arrive on time 80% of the time over the last 12 months.
On-time rate80%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights
based on 3,254 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesbestOn-time83%Medianon timep9025 minCancel0.7%Flights2,366
- Alaska AirlinesOn-time72%Medianon timep9045 minCancel0.7%Flights888
Why flights run late
Delay causes
- Airline53%
- Weather3%
- Air traffic (NAS)20%
- Late aircraft24%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SEA → ATL
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 85% on time.
- Mornings85% on time · p90 20 min · 3,221 flights
- Overnights78% on time · p90 30 min · 2,557 flights
- Middays78% on time · p90 30 min · 2,358 flights
- Evenings78% on time · p90 35 min · 169 flights · limited
- Afternoons77% on time · p90 35 min · 2,004 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 82% on time.
- Wednesdays82% on time · p90 25 min · 1,409 flights
- Tuesdays82% on time · p90 25 min · 1,387 flights
- Mondays80% on time · p90 30 min · 1,539 flights
- Thursdays80% on time · p90 30 min · 1,522 flights
- Saturdays80% on time · p90 30 min · 1,384 flights
- Fridays78% on time · p90 35 min · 1,533 flights
- Sundays76% on time · p90 35 min · 1,539 flights
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