Route
SEA → ATL
Seattle–Tacoma International Airport Hartsfield Jackson Atlanta International Airport
How punctual is this route?
- On-time arrivals
- 84.0%
- Less than 15 minutes late
- Cancelled
- 0.7%
- Of scheduled flights
- Average delay when late
- 80 min
- Flights arriving 15+ minutes late
- Flights tracked
- 3,294
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 59%
- Late-arriving aircraft 21%
- Air traffic control & airport 16%
- Extreme weather 4%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 90.1% | 284 |
| October 2025 | 85.2% | 295 |
| November 2025 | 87.0% | 256 |
| December 2025 | 79.2% | 269 |
| January 2026 | 86.3% | 213 |
| February 2026 | 91.1% | 191 |
| March 2026 | 80.8% | 231 |
| April 2026 | 85.5% | 251 |
| May 2026 | 82.8% | 298 |
| June 2026 | 83.6% | 325 |
| July 2026 | 76.0% | 348 |
| August 2026 | 84.1% | 333 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Delta Air Lines | 2,402 | 84.2% | 0.7% | 90 min |
| Alaska Airlines | 892 | 83.2% | 0.6% | 55 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
AS334
19% late · 365 flights
-
DL562
18% late · 365 flights
-
DL569
5% late · 364 flights
-
DL542
21% late · 350 flights
-
DL560
15% late · 348 flights
-
DL652
11% late · 348 flights
-
DL554
23% late · 302 flights
-
AS727
18% late · 199 flights
-
AS464
11% late · 173 flights
-
DL567
16% late · 160 flights
-
AS492
16% late · 151 flights
-
DL797
29% late · 86 flights
-
DL409
15% late · 54 flights
In the news
More headlines →-
City Council backs $55 million in new Hartsfield-Jackson funding as construction projects multiply
The Business Journals ATL
-
Over 400 flights cancelled due to severe weather at Hartsfield-Jackson Atlanta International Airport, Georgia
The Watchers - Watching the world evolve and transform ATL
-
Hartsfield-Jackson Atlanta International Airport
The Aviation Hub ATL
Headlines found by Google News; stories open on the publisher's site.
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