Airports › Seattle (SEA) › May 2024
Airport month · May 2024
Seattle/Tacoma International in May 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 May 2024, reporting carriers scheduled 14,338 domestic departures from Seattle/Tacoma International (SEA). 76.6% left less than 15 minutes late and 76.2% reached their destination on time; 0.5% were cancelled.
Nationally that month, 73.4% of flights departed on time and 72.3% arrived on time, so SEA departures were 3.2 points above the national departure figure.
Flights arriving at SEA that month were on time 77.0% of the time (14,333 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 41%, late-arriving aircraft 31% and national aviation system 25%.
- On time 76.2%
- Arrived 15+ minutes late 23.1%
- Cancelled 0.5%
- Diverted 0.2%
May 2024 against a year earlier, the airport's year and the nation
| Measure | May 2024 | Year earlier | SEA, 12 months to Jul 2026 | All reported flights, May 2024 |
|---|---|---|---|---|
| Departed on time | 76.6% | — | 78.2% | 73.4% |
| Arrived on time | 76.2% | — | 78.6% | 72.3% |
| Cancelled | 0.5% | — | 0.9% | 1.4% |
| Average departure delay (late minutes only) | 13.3 min | — | 13.2 min | 20.8 min |
| Scheduled departures a day | 478 | — | 452 | 20,325 |
| Scheduled departures | 14,338 | — | 164,821 | 609,743 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| AS Alaska Airlines | 6,881 | 48% | 71.6% | 7.8 min | 0.4% |
| DL Delta Air Lines | 2,858 | 20% | 82.9% | 1.1 min | 0.0% |
| OO SkyWest Airlines | 2,260 | 16% | 84.5% | 2.6 min | 0.0% |
| UA United Airlines | 840 | 6% | 75.6% | 7.2 min | 1.5% |
| WN Southwest Airlines | 635 | 4% | 75.0% | 7.9 min | 0.2% |
| AA American Airlines | 478 | 3% | 64.2% | 24.8 min | 5.6% |
| F9 Frontier Airlines | 112 | 1% | 78.6% | 4.8 min | 0.9% |
| MQ Envoy Air | 87 | 1% | 80.5% | 13.1 min | 0.0% |
| HA Hawaiian Airlines | 63 | 0% | 87.3% | -0.8 min | 0.0% |
| B6 JetBlue Airways | 62 | 0% | 69.4% | 5.0 min | 1.6% |
| NK Spirit Airlines | 62 | 0% | 82.3% | 9.8 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| SEA–ANC | Seattle to Anchorage | 701 | 61.8% | 16.5 min | 0.6% |
| SEA–LAX | Seattle to Los Angeles | 630 | 82.9% | 1.3 min | 0.3% |
| SEA–PHX | Seattle to Phoenix | 607 | 82.9% | 1.6 min | 0.0% |
| SEA–DEN | Seattle to Denver | 600 | 78.2% | 2.8 min | 0.2% |
| SEA–LAS | Seattle to Las Vegas | 558 | 78.5% | 4.2 min | 0.0% |
| SEA–SFO | Seattle to San Francisco | 545 | 54.7% | 21.4 min | 0.6% |
| SEA–ORD | Seattle to Chicago | 466 | 64.2% | 15.7 min | 1.7% |
| SEA–PDX | Seattle to Portland | 464 | 75.4% | 8.8 min | 0.0% |
| SEA–GEG | Seattle to Spokane | 430 | 82.3% | 4.4 min | 0.0% |
| SEA–DFW | Seattle to Dallas/Fort Worth | 399 | 64.9% | 20.1 min | 6.0% |
| SEA–SAN | Seattle to San Diego | 396 | 80.6% | 1.7 min | 0.3% |
| SEA–SJC | Seattle to San Jose | 379 | 81.0% | 3.4 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left SEA on time in May 2024?
76.6% of 14,338 scheduled domestic departures left less than 15 minutes late, and 76.2% reached their destination on time. The national figures that month were 73.4% and 72.3%.
How does that compare with a year earlier?
May 2023 is outside the 36 months on file, or the airport had too few reported flights that month.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 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.