Route · SFO → SEA
Flights from San Francisco to Seattle
San Francisco to Seattle is one of the busiest short-haul corridors on the US West Coast, covering roughly 680 miles with a typical block time of about an hour and forty-five minutes. Alaska Airlines dominates the route and operates it as a core piece of its Pacific Northwest network, while United holds a strong presence out of SFO given its hub status there; American and Delta round out the mainline competition, and the now-defunct Virgin America legacy still shapes Alaska's branding on the pairing following its 2018 absorption. Narrow-body jets — typically the Boeing 737 or Airbus A320 family — handle virtually all departures. At SFO, United operates from the main terminal complex while Alaska and others generally use Terminal 2, so confirm your terminal before heading to BART. Fares tend to soften in January and February after the holiday peak, and mid-week departures frequently undercut weekend pricing on this heavily business-traveled route.
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Cheapest dates to fly
Live prices · powered by AviasalesThe calendar below pulls live fares from our search partner for San Francisco (SFO) → Seattle (SEA). Use the year… view to spot the cheapest week to fly, the day-of-week patterns most travellers miss, and any shoulder-season dips worth shifting your trip around. Prices refresh every few hours, so what you see is what your booking page should look like a moment later — click any date to jump straight to the fare on Aviasales.
Airlines on this route
7 carriersThe 7 carriers we currently track on the San Francisco–Seattle route, from full-service flag carriers to low-cost competitors. Tap any airline for its full profile,… baggage rules, fleet context, and a live fare search pre-filtered to that carrier — useful if you're loyal to a frequent-flyer programme, want to compare onboard product on the same dates, or are weighing a cheaper one-stop against a pricier nonstop.
Flights from San Francisco to Seattle
Live schedule · powered by AviasalesBelow is the published weekly schedule for nonstop and one-stop services from San Francisco to Seattle — the actual flight numbers, departure and arrival times… your booking page will pull from. Use it to plan around departure preferences (early morning vs late evening), see which carriers fly on which weekdays, or pick a connection that lets you sleep in your own bed before a long-haul leg. Click any row to load it directly in the search.
Airport guides
Quick links into the airport profiles at both ends of the route. Each guide covers terminal layout, the airlines that base hubs at SFO and… SEA, the other routes those airports serve, and the ground-transit options most travellers wish they'd read about before landing — the practical context you only really need to know once you've booked, but want to skim before you do.