Cheapest Flights from San Francisco to Seattle
Your complete guide to finding the best deals on the SFO–SEA route. Fares starting from $69.
Looking for the cheapest flights from San Francisco to Seattle? This comprehensive guide covers everything you need to know about flying the SFO–SEA route, including the best airlines, typical prices, travel tips, and how to find the best deals in 2026.
San Francisco to Seattle Flight Overview
When to Book for the Best Price
Book your SFO–SEA flight 6–8 weeks in advance for the best economy fares.
Tuesday and Wednesday departures tend to be cheapest on this route.
Avoid peak travel periods (Christmas, Easter, summer holidays) when prices can be 2–3x higher.
Set up a price alert on flyingradar24 to get notified when fares drop below average.
If you see a fare under $69, book immediately — that's below the route average.
Airlines Flying SFO to SEA
3 airlines operate direct or connecting flights on this route. Here's what to expect:
Alaska includes checked baggage and meals in the ticket price. Look for sales and loyalty program discounts.
United includes checked baggage and meals in the ticket price. Look for sales and loyalty program discounts.
Delta includes checked baggage and meals in the ticket price. Look for sales and loyalty program discounts.
Arriving in Seattle
Seattle (SEA) is located in USA.
Check visa requirements well in advance — processing times vary by nationality.
Pre-book airport transfers or research public transport options to save money on arrival.
Consider travel insurance, especially for long-haul flights and expensive destinations.
5 Tips to Save Money on This Route
Use flexible dates: Shifting your travel by 1–2 days can save 20–40% on this route.
Compare airlines: Check both full-service and low-cost carriers — the cheapest option varies by season.
Book connecting flights: A stopover can cut the price by 30–50% compared to direct flights.
Join loyalty programs: Even occasional flyers can earn enough points for upgrades or free flights over time.
Clear your cookies: Some booking sites track your searches and raise prices — use incognito mode.
Frequently Asked Questions
How long is the flight from San Francisco to Seattle?
Direct flights take approximately 2h 10m. Connecting flights may take longer depending on the layover.
What is the cheapest month to fly from San Francisco to Seattle?
Generally, January, February, and November offer the lowest fares on this route. Avoid peak summer months and holiday periods for the best deals.
Which airlines fly from SFO to SEA?
Airlines operating this route include Alaska, United, Delta. Availability may vary by season.
How far in advance should I book?
For the best prices, book 6–8 weeks before departure for economy class, and 3–6 months ahead for business class.
Ready to Book Your Flight?
Compare prices across 3 airlines and find the best deal.
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