Route guide

Seattle to San Antonio (SEA-SAT): Nonstop Upgrade & Award Space

Alaska Airlines, Inc. and United Airlines fly the SEA to SAT nonstop about 13 times a week. That's enough service to give you a real choice of departures, though premium seats don't sit unclaimed for long. 2LNR watches every SEA to SAT departure for confirmed upgrade and award space and can alert you when a date you're tracking opens up.

Data current as of July 21, 2026, refreshed on an ongoing basis as new schedules and seats are confirmed.

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13
Nonstop flights a week
1,773 mi
Nonstop distance
Free
To get started

Confirmed upgrade & award space on every SEA to SAT departure

2LNR tracks confirmed upgrade and award availability on American, Delta, and Alaska and across 30 airlines, segment by segment, date by date. Open the calendar for Seattle to San Antonio to see which departures have real space, or watch the route and get alerted when space opens.

See real availability

Confirmed upgrade and award seats on each SEA to SAT departure, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are tracking.

Plan on the map

See SEA to SAT on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Seattle to San Antonio nonstop

Carriers operating SEA to SAT nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

  • Alaska Airlines, Inc.
  • United Airlines
See SEA to SAT on the interactive map →

Frequently asked questions about SEA to SAT

How far is San Antonio from Seattle?
SEA to SAT covers about 1,773 miles nonstop. Flight times vary by aircraft and season; each scheduled departure on this page lists its own times.
Which airlines fly nonstop from SEA to SAT?
Alaska Airlines, Inc. and United Airlines fly the route nonstop. 2LNR tracks confirmed upgrade and award space on both of them.
How many flights a week are there from SEA to SAT?
About 13 nonstop flights a week run between Seattle and San Antonio in the current schedule, operated by Alaska Airlines, Inc. and United Airlines. Frequency shifts by season; the calendar on this page reflects what's currently scheduled.
How do I check upgrade or award availability on SEA to SAT?
Open the SEA to SAT calendar on this page to see confirmed upgrade and award space by date. You can also set an alert on the Seattle to San Antonio route, and 2LNR will notify you when space opens. It's free to start.

Never miss SEA to SAT upgrade or award space

Track confirmed availability, set alerts, and book with confidence. Free to start, no credit card required.

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