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Cheap Flights from Seattle to San Francisco | EazAir

Travellers

Seattle to San Francisco flight insights

Average flight time

~2h 5m (estimated)

SEA → SFO

Cheapest month

—

Based on cached fare history

Cheapest cached price

$125

Checking live fares…

Prices shown may not be current. Last checked: Sep 1, 2026.

Planning a trip from Seattle to San Francisco? The average flight time on this route is ~2h 5m (estimated). The lowest fare we have cached for this route is $125 (last checked Sep 1, 2026).

Seattle to San Francisco covers a straight-line distance of about 679 miles. Based on that distance, a nonstop flight would take approximately ~2h 5m (estimated). Actual flight time varies by airline, aircraft and routing.

Route Quick Facts

Quick facts for flights from Seattle to San Francisco on Eazair
OriginSeattle (SEA)
DestinationSan Francisco (SFO)
Average Flight Time—
Cheapest Month to Fly—
Current Lowest Fare$125
Fares Last CheckedSep 1, 2026

Flight deals from Seattle to San Francisco

Flying from Seattle to San Francisco connects the Pacific Northwest to Northern California via a quick coastal route. Direct flights typically take around two hours and fifteen minutes to cover the 680-mile distance. Travelers depart from Seattle-Tacoma International Airport and touch down at San Francisco International Airport, making this an easy commute for tech professionals and leisure travelers alike. Multiple major carriers operate regular nonstop service along the Seattle to San Francisco corridor. Alaska Airlines and Delta Air Lines offer numerous daily departures out of their Pacific Northwest hubs. Additionally, United Airlines runs frequent flights between these two tech centers, giving passengers plenty of schedule options from early morning until late evening. Demand for travel from Seattle to San Francisco peaks during the late summer and early fall, specifically August through October. During these busiest travel months, Northern California enjoys warmer, fog-free weather, drawing crowds escaping the cooling Pacific Northwest. Winter and early spring offer a quieter travel period for this route, though holiday weeks in November and December still see high passenger volumes.

View of San Francisco, a popular flight destination from Seattle

About San Francisco

Popular areas to know in San Francisco include Mission District, North Beach, and Hayes Valley.

A Mediterranean climate, though famously cool and foggy in summer due to marine influence.

Frequently asked questions

How long is the flight from Seattle to San Francisco?
A direct flight from Seattle to San Francisco typically takes about two hours and fifteen minutes to cover the 680-mile distance.
Which airlines fly nonstop from Seattle to San Francisco?
Alaska Airlines, Delta Air Lines, and United Airlines provide regular nonstop service from Seattle to San Francisco.
When is the best time to book flights from Seattle to San Francisco?
For optimal availability, booking your trip from Seattle to San Francisco at least four to six weeks in advance is recommended, especially during the peak late summer months.
Which airports will I use when flying from Seattle to San Francisco?
You will depart from Seattle-Tacoma International Airport (SEA) and arrive at San Francisco International Airport (SFO).
What are the typical baggage rules for flights from Seattle to San Francisco?
Baggage allowances from Seattle to San Francisco depend on the carrier, but standard economy tickets generally include one personal item, while carry-on and checked bags may incur extra fees on basic economy fares.
What are the busiest months for traveling from Seattle to San Francisco?
August, September, and October are the peak travel months from Seattle to San Francisco due to the favorable autumn weather in Northern California.
Are there early morning or late evening flights from Seattle to San Francisco?
Yes, carriers like Alaska and United offer departures from Seattle to San Francisco starting as early as 6:00 AM, with late-night options departing after 8:00 PM.
Does weather commonly cause delays on flights from Seattle to San Francisco?
While delays can happen, morning fog at San Francisco International Airport or winter rain at Seattle-Tacoma International Airport are the most common weather factors affecting this route.
Are there connecting flights from Seattle to San Francisco, or are they all direct?
While direct service is plentiful, you can also find connecting itineraries from Seattle to San Francisco routing through cities like Portland or Sacramento, though these increase travel time.
What is the easiest way to get downtown after arriving on a flight from Seattle to San Francisco?
After flying from Seattle to San Francisco, passengers can take the BART (Bay Area Rapid Transit) train directly from the international terminal to downtown.
Why is the route from Seattle to San Francisco popular for business travelers?
Flights from Seattle to San Francisco connect two major technology hubs, resulting in high frequency schedules tailored for corporate commuters needing same-day return options.
How far is it from Seattle to San Francisco?
The straight-line distance from Seattle to San Francisco is about 679 miles.
What ID do I need to fly from Seattle to San Francisco?
Since Seattle to San Francisco is a domestic US flight, you'll need a REAL ID-compliant driver's license or another TSA-accepted form of ID, such as a valid US passport. A standard, non-compliant driver's license alone is no longer accepted at TSA checkpoints.
Which airlines operate flights from Seattle to San Francisco?
Based on a recent live fare search, United Airlines, Delta Air Lines and American Airlines had bookable flights on the Seattle to San Francisco route.
What's the weather usually like in San Francisco?
A Mediterranean climate, though famously cool and foggy in summer due to marine influence.

Airline baggage policies

Baggage allowances differ significantly between fare classes (Basic/Light vs. Standard/Flex) and can change over time. Always verify the exact allowance for your specific fare with the airline before you fly.

General airline baggage policy reference
AirlineCabin bagChecked bag
Delta Air Lines1 carry-on + 1 personal item on most fares1 checked bag typically included on Main Cabin and above; Basic Economy usually excludes it
American Airlines1 carry-on + 1 personal item on most fares1 checked bag typically included on Main Cabin and above; Basic Economy usually excludes it
United Airlines1 carry-on + 1 personal item on most fares1 checked bag typically included on Economy and above; Basic Economy usually excludes it
Southwest Airlines1 carry-on + 1 personal item2 checked bags included on every fare — a long-standing, well-known Southwest policy
JetBlue Airways1 personal item on the cheapest (Blue Basic) fare; a carry-on is added on higher faresNot included on Blue Basic; typically included from Blue Plus and above
Alaska Airlines1 carry-on + 1 personal item on most fares1 checked bag typically included on Main and above; Saver fares usually exclude it
Spirit Airlines1 personal item included; a full-sized carry-on is a paid add-onNot included on the base fare — a paid add-on at every fare tier
Frontier Airlines1 personal item included; a full-sized carry-on is a paid add-onNot included on the base fare — a paid add-on at every fare tier

Travel tips

Arrive early for domestic flights

TSA generally recommends arriving at least 2 hours before a domestic departure, more at larger hub airports during peak travel periods.

Pack a mixed carry-on

Keep a change of clothes, chargers, and any essentials in your carry-on rather than only your checked bag, in case of a delay or a bag that doesn't arrive with you.

Ease jet lag on longer routes

On longer cross-country flights, adjusting your sleep schedule a day or two before departure and staying hydrated in flight can reduce jet lag on arrival.

Screenshot your confirmation

Save a screenshot or PDF of your booking confirmation and boarding pass before you travel, in case you lose signal or battery at the airport.

Check in online when it opens

Most airlines open online check-in 24 hours before departure — checking in early can help with seat selection and, on some airlines, boarding group assignment.

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