Route
ATL → SEA
Hartsfield Jackson Atlanta International Airport Seattle–Tacoma International Airport
How punctual is this route?
- On-time arrivals
- 76.7%
- Less than 15 minutes late
- Cancelled
- 0.7%
- Of scheduled flights
- Average delay when late
- 62 min
- Flights arriving 15+ minutes late
- Flights tracked
- 3,297
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 52%
- Air traffic control & airport 27%
- Late-arriving aircraft 18%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 89.0% | 283 |
| October 2025 | 81.8% | 295 |
| November 2025 | 84.7% | 257 |
| December 2025 | 61.1% | 269 |
| January 2026 | 73.5% | 214 |
| February 2026 | 75.4% | 193 |
| March 2026 | 69.5% | 232 |
| April 2026 | 88.0% | 252 |
| May 2026 | 76.7% | 296 |
| June 2026 | 76.7% | 324 |
| July 2026 | 68.5% | 348 |
| August 2026 | 75.9% | 334 |
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 | 2,404 | 76.8% | 0.6% | 63 min |
| Alaska Airlines | 893 | 76.4% | 1.0% | 60 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
DL629
20% late · 365 flights
-
DL774
15% late · 365 flights
-
DL444
22% late · 363 flights
-
DL481
22% late · 329 flights
-
DL714
35% late · 310 flights
-
AS377
15% late · 302 flights
-
DL903
22% late · 288 flights
-
DL472
30% late · 174 flights
-
AS348
28% late · 160 flights
-
AS533
29% late · 127 flights
-
DL648
19% late · 121 flights
-
AS124
28% late · 112 flights
-
AS218
36% late · 82 flights
-
AS263
25% late · 49 flights
-
DL834
46% late · 46 flights
-
AS335
27% late · 33 flights
-
AS457
7% late · 27 flights
-
DL2524
19% late · 21 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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