Route
SAT → SEA
San Antonio International Airport Seattle–Tacoma International Airport
1,774 miles
Return route SEA → SAT →
How punctual is this route?
- On-time arrivals
- 78.9%
- Less than 15 minutes late
- Cancelled
- 1.1%
- Of scheduled flights
- Average delay when late
- 61 min
- Flights arriving 15+ minutes late
- Flights tracked
- 550
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 46%
- Airline (crew, maintenance, cleaning) 35%
- Air traffic control & airport 15%
- Extreme weather 4%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 93.6% | 47 |
| October 2025 | 76.9% | 54 |
| November 2025 | 81.2% | 50 |
| December 2025 | 63.5% | 52 |
| January 2026 | 73.0% | 38 |
| February 2026 | 89.3% | 28 |
| March 2026 | 54.8% | 31 |
| April 2026 | 93.1% | 30 |
| May 2026 | 92.0% | 50 |
| June 2026 | 80.0% | 60 |
| July 2026 | 77.0% | 61 |
| August 2026 | 73.5% | 49 |
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 |
|---|---|---|---|---|
| Alaska Airlines | 550 | 78.9% | 1.1% | 61 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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