SAT to SEA flight delays & on-time performance
Nonstop flights from San Antonio International Airport to Seattle–Tacoma International Airport · 1,774 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SAT or SEA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from San Antonio (SAT) to Seattle (SEA) arrived on time 79% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1.3% were cancelled, and 5% arrived an hour or more late.
- Alaska Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 7am did best (88% on time); around 7pm did worst (69%).
- Tuesday was the most reliable day to fly (83% on time) and Sunday the least (73%).
- The largest source of delay minutes was late-arriving aircraft (44%).
Which airline is most on time from SAT to SEA?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Alaska Airlines | 79% | 1.3% | 13 min | 5.4% | 558 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am83%141 flights
- 7am88%99 flights
- 4pm70%50 flights
- 5pm81%64 flights
- 6pm74%136 flights
- 7pm69%68 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday80%2.3% cancelled
- Tuesday83%1.4% cancelled
- Wednesday80%0.0% cancelled
- Thursday76%2.4% cancelled
- Friday78%1.1% cancelled
- Saturday81%1.4% cancelled
- Sunday73%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft44%
- Airline (crew, maintenance, cleaning, fueling)35%
- Air traffic control & airport congestion17%
- Extreme weather4%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)86%
- Air traffic control & airport congestion14%
- Extreme weather0%
- Security0%
SAT to SEA: common questions
- How often are SAT to SEA flights on time?
- 79% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from San Antonio to Seattle cancelled?
- 1.3% of scheduled flights were cancelled (7 of 558).
- How long are typical delays?
- Across all flights the average arrival delay was 13 min (early arrivals count as zero). Flights that were late arrived 54 min behind schedule on average, and 5.4% of flights were an hour or more late.
- How long is taxi time at SAT?
- Flights on this route spent 14 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SEA to SAT — 76% on time
More flights from San Antonio
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SAT → SEA, nonstop flights by US airlines that report to the DOT. How we calculate this.