ORIGIN AIRPORT REPORT
SEA
Seattle, WA (SEA) departure reliability
Of 165,184 scheduled reportable flights departing SEA, 78.3% arrived on time, 11.9% arrived at least 30 minutes late, and 1.0% were cancelled during July 2025–June 2026.
Source: U.S. Bureau of Transportation Statistics · Origin-airport cohort · Updated September 16, 2026
HISTORICAL ROUTE SIGNALGenerally reliable
78.3%arrived on time
11.9%30+ min late
1.0%cancelled
165,184scheduled flights
MOST-FLOWN DIRECTIONS
ALL ROUTES →Which route from SEA had the largest sample?
SEA to LAX was SEA's largest published route sample, with 7,428 scheduled flights and a 82.6% on-time rate during July 2025–June 2026.
SEA→LAXSeattle, WA (SEA) to Los Angeles, CA (LAX)7,428 flights analyzedLower disruption82.6%on timeSEA→PHXSeattle, WA (SEA) to Phoenix, AZ (PHX)7,268 flights analyzedGenerally reliable78.4%on timeSEA→SFOSeattle, WA (SEA) to San Francisco, CA (SFO)6,764 flights analyzedVariable64.8%on timeSEA→ANCSeattle, WA (SEA) to Anchorage, AK (ANC)6,681 flights analyzedGenerally reliable74.4%on timeSEA→DENSeattle, WA (SEA) to Denver, CO (DEN)6,317 flights analyzedGenerally reliable76.7%on timeSEA→LASSeattle, WA (SEA) to Las Vegas, NV (LAS)5,650 flights analyzedGenerally reliable77.0%on timeSEA→ORDSeattle, WA (SEA) to Chicago, IL (ORD)5,566 flights analyzedGenerally reliable73.4%on timeSEA→DFWSeattle, WA (SEA) to Dallas/Fort Worth, TX (DFW)5,233 flights analyzedGenerally reliable75.2%on timeSEA→GEGSeattle, WA (SEA) to Spokane, WA (GEG)5,221 flights analyzedLower disruption81.6%on timeSEA→PDXSeattle, WA (SEA) to Portland, OR (PDX)4,778 flights analyzedLower disruption82.6%on timeSEA→SANSeattle, WA (SEA) to San Diego, CA (SAN)4,584 flights analyzedGenerally reliable76.1%on timeSEA→SMFSeattle, WA (SEA) to Sacramento, CA (SMF)4,407 flights analyzedLower disruption81.4%on timeSEA→SJCSeattle, WA (SEA) to San Jose, CA (SJC)4,371 flights analyzedLower disruption80.9%on timeSEA→SLCSeattle, WA (SEA) to Salt Lake City, UT (SLC)4,107 flights analyzedLower disruption82.8%on timeSEA→BOISeattle, WA (SEA) to Boise, ID (BOI)3,972 flights analyzedLower disruption85.5%on time
Which airline was most reliable departing SEA?
Among qualifying SEA airline departure results, Envoy Air had the highest on-time rate: 86.3% of 691 flights. JetBlue Airways was lowest at 58.8% across 413 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 76,697 | 76.1% | 12.7% | 1.0% |
| Delta Air Lines | 32,257 | 80.3% | 11.0% | 1.1% |
| SkyWest Airlines | 29,109 | 85.3% | 7.9% | 0.7% |
| United Airlines | 8,804 | 79.2% | 13.4% | 0.8% |
| Southwest Airlines | 8,105 | 69.5% | 17.3% | 0.4% |
| American Airlines | 6,630 | 76.8% | 13.6% | 2.1% |
| Frontier Airlines | 1,401 | 71.9% | 17.1% | 2.3% |
| Hawaiian Airlines | 1,034 | 59.6% | 24.8% | 1.3% |
| Envoy Air | 691 | 86.3% | 8.1% | 0.0% |
| JetBlue Airways | 413 | 58.8% | 29.8% | 0.7% |
| Spirit Airlines | 43 | 67.4% | 18.6% | 0.0% |
Origin report, not airport-wide operations.
These figures summarize the reported scheduled passenger flights in the dataset, not every flight or every airport process.