Cheapest weekends to fly Seattle to Santa Rosa nonstop

We price every nonstop weekend round-trip (2–4 nights, leaving Thu–Sat) on SEA → STS and rank the weekends below by date. Right now the cheapest is Sep 26–29 at $317 round-trip — 21% below this route's typical short-trip price. Updated August 30, 2026.

Thu, Sep 17 → Sun, Sep 20 3 nights

AS Alaska

$432 Check this weekend →

Cheapest weekend

Sat, Sep 26 → Tue, Sep 29 3 nights

AS Alaska 21% below typical

$317 Check this weekend →

Fri, Oct 2 → Mon, Oct 5 3 nights

AS Alaska 21% below typical

$317 Check this weekend →

Thu, Oct 8 → Sun, Oct 11 3 nights

AS Alaska

$737 Check this weekend →

Sat, Oct 17 → Tue, Oct 20 3 nights

AS Alaska 21% below typical

$317 Check this weekend →

Fri, Oct 23 → Mon, Oct 26 3 nights

AS Alaska 21% below typical

$317 Check this weekend →

Thu, Oct 29 → Sun, Nov 1 3 nights

AS Alaska 21% below typical

$317 Check this weekend →

Sat, Nov 7 → Tue, Nov 10 3 nights

AS Alaska 21% below typical

$317 Check this weekend →

Fri, Nov 13 → Mon, Nov 16 3 nights

AS Alaska 21% below typical

$317 Check this weekend →

Prices are the cheapest nonstop round-trip we found for each weekend, checked within the last 14 days. Fares move — "Check this weekend" re-prices the exact dates live.