81% of SEA → ATL flights arrived on time in June-August 2026 (994 flights). The most reliable was DL 569, on time 96% of the time on this route. Evening flights did best (88%), morning flights worst (77%). Seattle (SEA): no delay reported. Atlanta (ATL): no delay reported.
Best time of day to fly SEA → ATL
| Morning (before noon) | |
| Afternoon (noon-5 PM) | |
| Evening (after 5 PM) |
Flights SEA → ATL, most reliable first
| Flight | Departs | On time on this route | Cancelled |
|---|---|---|---|
| DL 569 Delta | 6:00 AM | 0% | |
| DL 652 Delta | 11:59 PM | 0% | |
| AS 464 Alaska Airlines | 11:31 PM | 0% | |
| DL 560 Delta | 4:05 PM | 0% | |
| DL 409 Delta | 10:58 PM | 0% | |
| DL 542 Delta | 1:35 PM | 0% | |
| DL 567 Delta | 9:45 PM | 1.9% | |
| AS 727 Alaska Airlines | 4:05 PM | 0% | |
| DL 562 Delta | 7:20 AM | 2.2% | |
| DL 554 Delta | 11:56 AM | 0% | |
| DL 797 Delta | 8:40 AM | 4.7% | |
| AS 334 Alaska Airlines | 9:05 AM | 0% |
SEA conditions · ATL conditions · ATL → SEA · Cancellations
Plans changed?
Find another flightToday's seats SEA → ATL, any airlineRental car at SEADrive insteadHotel near SEAFree cancellation on most rooms
Affiliate links.
From BTS on-time data, June-August 2026; flights with 20+ trips on this route. On-time rates cover each flight number's whole day, which can include other legs. Departure times are local.