Airports › Seattle (SEA) › July 2025
Airport month · July 2025
Seattle/Tacoma International in July 2025
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 July 2025, reporting carriers scheduled 16,577 domestic departures from Seattle/Tacoma International (SEA). 71.2% left less than 15 minutes late and 67.9% reached their destination on time; 1.4% were cancelled.
Nationally that month, 69.7% of flights departed on time and 69.0% arrived on time, so SEA departures were 1.5 points above the national departure figure.
A year earlier, in July 2024, the airport had 16,198 departures with 73.8% leaving on time: a change of −2.6 points, with flights up 2%.
Flights arriving at SEA that month were on time 73.1% of the time (16,576 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 39%, late-arriving aircraft 37% and national aviation system 22%.
- On time 67.9%
- Arrived 15+ minutes late 30.2%
- Cancelled 1.4%
- Diverted 0.5%
July 2025 against a year earlier, the airport's year and the nation
| Measure | Jul 2025 | Jul 2024 | SEA, 12 months to Jul 2026 | All reported flights, Jul 2025 |
|---|---|---|---|---|
| Departed on time | 71.2% | 73.8% | 78.2% | 69.7% |
| Arrived on time | 67.9% | 72.5% | 78.6% | 69.0% |
| Cancelled | 1.4% | 1.7% | 0.9% | 2.5% |
| Average departure delay (late minutes only) | 17.9 min | 15.2 min | 13.2 min | 24.3 min |
| Scheduled departures a day | 553 | 540 | 452 | 21,048 |
| Scheduled departures | 16,577 | 16,198 | 164,821 | 631,428 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| AS Alaska Airlines | 7,510 | 45% | 59.4% | 16.9 min | 2.1% |
| DL Delta Air Lines | 2,970 | 18% | 78.2% | 5.9 min | 0.9% |
| OO SkyWest Airlines | 2,876 | 17% | 83.3% | 1.2 min | 0.1% |
| UA United Airlines | 1,034 | 6% | 70.5% | 13.3 min | 1.5% |
| WN Southwest Airlines | 988 | 6% | 61.4% | 18.3 min | 0.3% |
| AA American Airlines | 649 | 4% | 69.6% | 26.9 min | 2.0% |
| HA Hawaiian Airlines | 217 | 1% | 48.4% | 36.1 min | 1.4% |
| F9 Frontier Airlines | 152 | 1% | 55.9% | 34.7 min | 3.3% |
| B6 JetBlue Airways | 93 | 1% | 33.3% | 104.2 min | 1.1% |
| MQ Envoy Air | 57 | 0% | 80.7% | -11.5 min | 0.0% |
| NK Spirit Airlines | 31 | 0% | 67.7% | 6.8 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| SEA–ANC | Seattle to Anchorage | 745 | 64.3% | 14.2 min | 2.1% |
| SEA–DEN | Seattle to Denver | 670 | 59.1% | 24.0 min | 1.2% |
| SEA–LAX | Seattle to Los Angeles | 642 | 76.8% | 8.1 min | 1.2% |
| SEA–SFO | Seattle to San Francisco | 639 | 69.3% | 11.7 min | 1.9% |
| SEA–ORD | Seattle to Chicago | 623 | 63.6% | 17.1 min | 1.3% |
| SEA–PHX | Seattle to Phoenix | 621 | 73.3% | 6.9 min | 0.5% |
| SEA–GEG | Seattle to Spokane | 544 | 69.1% | 8.7 min | 0.9% |
| SEA–LAS | Seattle to Las Vegas | 521 | 68.3% | 10.7 min | 0.8% |
| SEA–DFW | Seattle to Dallas/Fort Worth | 505 | 63.6% | 28.3 min | 1.6% |
| SEA–SMF | Seattle to Sacramento | 455 | 73.0% | 9.4 min | 0.7% |
| SEA–SAN | Seattle to San Diego | 446 | 73.8% | 4.5 min | 2.7% |
| SEA–SJC | Seattle to San Jose | 425 | 70.6% | 8.1 min | 2.4% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left SEA on time in July 2025?
71.2% of 16,577 scheduled domestic departures left less than 15 minutes late, and 67.9% reached their destination on time. The national figures that month were 69.7% and 69.0%.
How does that compare with a year earlier?
In July 2024, 73.8% of 16,198 departures left on time and 1.7% were cancelled, against 71.2% and 1.4% in July 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for July 2025; 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.