Airports › Seattle (SEA) › August 2024
Airport month · August 2024
Seattle/Tacoma International in August 2024
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.
In August 2024, reporting carriers scheduled 15,984 domestic departures from Seattle/Tacoma International (SEA). 74.9% left less than 15 minutes late and 72.0% reached their destination on time; 0.8% were cancelled.
Nationally that month, 75.4% of flights departed on time and 74.7% arrived on time, so SEA departures were 0.5 points below the national departure figure.
A year earlier, in August 2023, the airport had 15,974 departures with 80.7% leaving on time: a change of −5.8 points, with flights up 0%.
Flights arriving at SEA that month were on time 75.2% of the time (15,983 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 36%, late-arriving aircraft 35% and national aviation system 23%.
- On time 72.0%
- Arrived 15+ minutes late 26.9%
- Cancelled 0.8%
- Diverted 0.3%
August 2024 against a year earlier, the airport's year and the nation
| Measure | Aug 2024 | Aug 2023 | SEA, 12 months to Jul 2026 | All reported flights, Aug 2024 |
|---|---|---|---|---|
| Departed on time | 74.9% | 80.7% | 78.2% | 75.4% |
| Arrived on time | 72.0% | 78.1% | 78.6% | 74.7% |
| Cancelled | 0.8% | 0.4% | 0.9% | 2.1% |
| Average departure delay (late minutes only) | 14.6 min | 11.5 min | 13.2 min | 18.4 min |
| Scheduled departures a day | 533 | 533 | 452 | 20,634 |
| Scheduled departures | 15,984 | 15,974 | 164,821 | 619,025 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| AS Alaska Airlines | 7,573 | 47% | 68.4% | 10.9 min | 0.9% |
| DL Delta Air Lines | 2,960 | 19% | 80.0% | 4.9 min | 0.4% |
| OO SkyWest Airlines | 2,509 | 16% | 76.8% | 8.3 min | 0.2% |
| UA United Airlines | 967 | 6% | 77.0% | 9.9 min | 1.8% |
| WN Southwest Airlines | 875 | 5% | 65.1% | 12.2 min | 0.1% |
| AA American Airlines | 601 | 4% | 69.6% | 17.9 min | 2.0% |
| F9 Frontier Airlines | 164 | 1% | 59.1% | 20.6 min | 4.3% |
| NK Spirit Airlines | 132 | 1% | 56.1% | 24.0 min | 3.8% |
| B6 JetBlue Airways | 93 | 1% | 53.8% | 28.7 min | 3.2% |
| HA Hawaiian Airlines | 64 | 0% | 76.6% | 12.6 min | 1.6% |
| MQ Envoy Air | 46 | 0% | 67.4% | 13.4 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| SEA–ANC | Seattle to Anchorage | 844 | 68.7% | 11.1 min | 0.8% |
| SEA–LAX | Seattle to Los Angeles | 693 | 77.6% | 5.7 min | 0.9% |
| SEA–DEN | Seattle to Denver | 671 | 68.4% | 12.7 min | 0.3% |
| SEA–SFO | Seattle to San Francisco | 627 | 64.1% | 14.7 min | 1.3% |
| SEA–LAS | Seattle to Las Vegas | 619 | 67.9% | 13.6 min | 1.3% |
| SEA–PHX | Seattle to Phoenix | 588 | 68.7% | 10.3 min | 0.5% |
| SEA–ORD | Seattle to Chicago | 551 | 70.8% | 12.2 min | 0.2% |
| SEA–DFW | Seattle to Dallas/Fort Worth | 528 | 67.8% | 14.6 min | 0.8% |
| SEA–PDX | Seattle to Portland | 460 | 74.6% | 10.8 min | 0.0% |
| SEA–GEG | Seattle to Spokane | 453 | 73.5% | 9.4 min | 0.0% |
| SEA–SAN | Seattle to San Diego | 436 | 75.5% | 6.6 min | 0.2% |
| SEA–SJC | Seattle to San Jose | 432 | 74.1% | 9.6 min | 0.9% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left SEA on time in August 2024?
74.9% of 15,984 scheduled domestic departures left less than 15 minutes late, and 72.0% reached their destination on time. The national figures that month were 75.4% and 74.7%.
How does that compare with a year earlier?
In August 2023, 80.7% of 15,974 departures left on time and 0.4% were cancelled, against 74.9% and 0.8% in August 2024.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for August 2024; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for SEA · methodology · corrections.