Seattle (SEA) to San Antonio (SAT) flights
Alaska Airlines flies nonstop from Seattle-Tacoma International Airport to San Antonio International Airport, with about 14 flights a week in July 2026. The 1,774-mile flight takes about 3h 57m gate to gate.
- Distance
- 1,774 mi · 2,855 km
- Flight time
- 3h 57m
- Airlines
- 1
- Seats filled
- 83%
Airlines flying SEA to SAT
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Alaska Airlines | 14 | Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800 | 81,381 | 3h 57m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SEA to SAT flight schedule
2 flight numbers flew this route in August 2026, 1 of them almost daily. The first usually leaves at 9:38am and the last at 10:58pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| AS 494Alaska Airlines | 9:38am | 3:46pm | 31 | 76% |
| AS 520Alaska Airlines | 10:58pm | 5:00am | 17 | 68% |
Is SEA to SAT on time?
From September 2025 to August 2026, 76% of 549 flights arrived within 15 minutes of schedule and 0.7% were cancelled. Flights leaving around 5pm were the most punctual (89%), those around 10pm the least (58%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (52%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 549 | 76% | 12 min | 0.7% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 9am to 10am | 70 | 69% | |
| 10am to 11am | 97 | 79% | |
| 11am to 12pm | 138 | 76% | |
| 12pm to 1pm | 60 | 85% | |
| 5pm to 6pm | 45 | 89% | |
| 6pm to 7pm | 14 | 79% | |
| 10pm to 11pm | 69 | 58% | |
| 11pm to 12am | 56 | 80% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 56 | 8,509 | |
| September 2025 | 47 | 6,648 | |
| October 2025 | 52 | 7,323 | |
| November 2025 | 49 | 6,912 | |
| December 2025 | 52 | 7,409 | |
| January 2026 | 37 | 5,382 | |
| February 2026 | 28 | 4,680 | |
| March 2026 | 31 | 5,032 | |
| April 2026 | 32 | 4,846 | |
| May 2026 | 53 | 6,950 | |
| June 2026 | 63 | 9,096 | |
| July 2026 | 61 | 9,204 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.