Delta Air Lines SEA to ATL on-time performance
Delta Air Lines nonstop flights from Seattle to Atlanta · Aug 2025 – Jul 2026
On-time arrivals
84%
arrived < 15 min late
Cancelled
0.6%
14 flights
Avg arrival delay
14 min
83 min when late
Rank on route
#1 of 2
route average 84% on time
Key facts
- Delta Air Lines flights on SEA to ATL arrived on time 84% of the time in Aug 2025 – Jul 2026.
- 0.6% were cancelled, and 5% arrived an hour or more late.
- That ranks #1 of 2 airlines on this route, which averaged 84% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (63%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)63%
- Late-arriving aircraft18%
- Air traffic control & airport congestion14%
- Extreme weather5%
- Security0%
Other airlines on SEA to ATL
- Alaska Airlines82% on time · 9 min avg delay
Full SEA to ATL comparison →
Delta Air Lines on-time record across all routes →
2,380 Delta Air Lines flights tracked on this route; 14 cancelled, 11 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.