Flights from Seattle to San Francisco
North AmericaYear-round

Cheap Flights from Seattle to San Francisco

Track economy fares on the SEASFO route and get alerts when prices drop.

From
Seattle
SEA
To
San Francisco
SFO

Route Intelligence: SeattleSan Francisco

Flight Duration

2 hr 30 min (Direct)

Price Guidance

A good deal is under $120 roundtrip. Standard fare is $200-$300+.

Peak Season

June to August

Top Airlines

Alaska Airlines, United Airlines, Southwest Airlines

Booking Tip

Book 2-4 weeks in advance for the best fares on this short-haul route. Traveling Tuesday through Thursday can save 10-20% compared to weekend flights.

Track SeattleSan Francisco Fares

Set your target price and FlightKitten will scan this route twice daily. The instant economy fares drop below your budget, you'll get an email with the price, airline, and a direct booking link.

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Route Summary: SeattleSan Francisco

From
Seattle (SEA)
To
San Francisco (SFO)
Duration
2 hr 30 min (Direct)
Airlines
Alaska Airlines, United Airlines, Southwest Airlines
Price Guide
A good deal is under $120 roundtrip. Standard fare is $200-$300+.
Tracking
FlightKitten scans 220+ airlines 2× daily

Airport Ground Transit: Arriving in San Francisco

Getting from SFO airport to the city center

BART train takes approximately 30 minutes from SFO to downtown San Francisco

Local Currency
US Dollar ($)
Transit Tip
Public airport trains & express buses save up to 70% over standard airport taxis.
Fare Savings
Buy contactless transit cards at airport arrival kiosks for discounted multi-day travel.

Economy Baggage & Budget Carrier Guide

Maximize savings on Seattle to San Francisco economy airfare

Low-Cost Carriers Serving San Francisco

Airlines offering competitive budget fares include Southwest Airlines, Spirit Airlines. Compare their base rates against full-service carriers once baggage fees are factored in.

Carry-On vs. Personal Item Rules

Basic economy fares on transatlantic and domestic routes often restrict free baggage to one small under-seat personal item. Add carry-on bags during initial booking to avoid steep gate-check surcharges.

Seasonality & Fare Calendar: SeattleSan Francisco

Historical pricing cycles and best times to book economy seats

Lowest Fares (Off-Peak)
September to November

Off-peak months offer typical fare discounts of 25–40% compared to summer highs.

Peak Season Warning
June to August

High demand drives fares up. Set your FlightKitten alert 4–6 months in advance for peak travel.

Optimal Booking Window
6 to 12 Weeks Ahead

Airlines typically release promotional inventory 45–90 days before departure on this corridor.

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Airlines Monitored
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Deal Briefings
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Other Routes to San Francisco

More Destinations in North America

Route Briefing: Seattle to San Francisco

Seattle and San Francisco are two of the West Coast's most distinctive cities, and the fact that you can be sipping coffee in Capitol Hill and walking the streets of the Mission District just two and a half hours later makes this one of the most satisfying short-haul routes in the country. Alaska Airlines, United, and Southwest all fly this corridor regularly, keeping competition healthy and fares reasonable. If you catch a good deal, you're looking at under $120 roundtrip — which, frankly, is less than a nice dinner in either city.

San Francisco rewards visitors who come ready to explore on foot and by neighborhood. The city is really a collection of distinct villages stitched together, each with its own personality. Chinatown is one of the oldest and most densely populated in North America, and wandering its streets feels genuinely transportive. The Mission District brings vibrant murals and some of the best taquerias you'll find anywhere. North Beach carries the ghost of the Beat Generation in its bookshops and cafes. And then there's the Golden Gate Bridge — yes, it's iconic, but crossing it on foot or by bike on a clear morning is one of those experiences that earns its reputation every single time.

Getting from SFO into the city is straightforward and affordable. BART, the Bay Area's rapid transit system, connects directly from the airport to downtown San Francisco in roughly 30 minutes, making it one of the easiest airport-to-city transfers in any major American metro. Skip the cab line and head for the AirTrain to the BART station.

Timing matters on this route. Summer — June through August — is peak season, when tourists flood in and hotel prices climb accordingly. Counterintuitively, San Francisco summers can be cool and foggy, especially in the mornings. If you want warmth and sunshine, September and October are often the city's most beautiful months, with clearer skies and smaller crowds. That's also when the surrounding wine country in Napa and Sonoma is deep into harvest season, which is worth building a day trip around if you have the time.

For the best fares, book two to four weeks out and aim for Tuesday through Thursday travel — midweek flights on this route can run noticeably cheaper than weekend departures. The route operates year-round, so there's genuinely no bad time to go, just smarter and less smart times to book.

How much are flights from Seattle to San Francisco in 2026?

Flight prices from Seattle (SEA) to San Francisco (SFO) vary significantly depending on the season, day of the week, and how far in advance you book. A good deal is under $120 roundtrip. Standard fare is $200-$300+. Popular carriers on this route include Alaska Airlines, United Airlines, Southwest Airlines. FlightKitten eliminates the guesswork by monitoring 220+ airlines twice daily and alerting you the moment economy fares hit your target price.

How does FlightKitten track Seattle to San Francisco fares?

FlightKitten is an economy flight price monitoring platform that scans 220+ airlines twice every day for economy fares on the SEA to SFO route. When you set a target price, FlightKitten continuously monitors this route and sends an email alert the moment fares drop below your budget. Each alert includes the exact fare, airline, dates, and an AI-powered briefing that explains whether the deal is genuinely good compared to historical pricing on this route. No more obsessive price checking — set your budget and let FlightKitten do the watching. Learn more about how FlightKitten tracking works.

See our full San Francisco destination guide for all available routes. Also popular: Seattle to Anchorage.

Pro tip: Book 2-4 weeks in advance for the best fares on this short-haul route. Traveling Tuesday through Thursday can save 10-20% compared to weekend flights.

Looking for business class on this route? CEOFLIGHTS pairs you with a Personal Travel Manager who finds affordable business class fares and handles every detail of your journey. Alternatively, BestBusinessClass.com offers free expert quotes with real savings.