Cheapest weekends to fly San Francisco to Seattle nonstop

We price every nonstop weekend round-trip (2–4 nights, leaving Thu–Sat) on SFO → SEA and rank the weekends below by date. Right now the cheapest is Aug 8–11 at $197 round-trip — 48% below this route's typical short-trip price. Updated July 14, 2026.

Sat, Jul 18 → Tue, Jul 21 3 nights

AS Alaska

$543 Check this weekend →

Sat, Jul 25 → Tue, Jul 28 3 nights

UA United

$417 Check this weekend →

Sat, Aug 1 → Tue, Aug 4 3 nights

UA United 38% below typical

$232 Check this weekend →

Cheapest weekend

Sat, Aug 8 → Tue, Aug 11 3 nights

UA United 48% below typical

$197 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.