Route guide

Windsor to San Diego (STS-SAN): Nonstop Upgrade & Award Space

Alaska Airlines, Inc. flies nonstop between Windsor (STS) and San Diego (SAN), roughly 21 times a week. With Alaska Airlines, Inc. operating this route so often, premium seats still turn over daily, and upgrade or award space can open and close within hours. 2LNR tracks confirmed availability on every STS to SAN departure, so you know which flights have space before you book.

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

See STS to SAN on the interactive map Get started free
21
Nonstop flights a week
508 mi
Nonstop distance
Free
To get started

Confirmed upgrade & award space on every STS to SAN 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 Windsor to San Diego 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 STS to SAN 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 STS to SAN on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Windsor to San Diego nonstop

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

  • Alaska Airlines, Inc.
See STS to SAN on the interactive map →

Frequently asked questions about STS to SAN

How far is San Diego from Windsor?
STS to SAN covers about 508 miles nonstop. Flight times vary by aircraft and season; each scheduled departure on this page lists its own times.
Which airlines fly nonstop from STS to SAN?
Alaska Airlines, Inc. is currently the only airline flying STS to SAN nonstop. 2LNR tracks confirmed upgrade and award space on every Alaska Airlines, Inc. departure.
How many flights a week are there from STS to SAN?
About 21 nonstop flights a week run between Windsor and San Diego in the current schedule, operated by Alaska Airlines, Inc.. Frequency shifts by season; the calendar on this page reflects what's currently scheduled.
How do I check upgrade or award availability on STS to SAN?
Open the STS to SAN calendar on this page to see confirmed upgrade and award space by date. You can also set an alert on the Windsor to San Diego route, and 2LNR will notify you when space opens. It's free to start.

Never miss STS to SAN upgrade or award space

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

Get started free