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Cheap flights from San Francisco to Seattle

Recently found return fares from $69, with November the cheapest month we know of. Compare dates, then book with the partner you choose.

Cheapest months to fly

Lowest recently found return fare in each month. Tap a month to see that month's calendar.

$122 Oct2026 $69 Nov2026 $173 May2027 $171 Sep2027

San Francisco → Seattle

November 2026

Mon Tue Wed Thu Fri Sat Sun 1 2 3 4 5 6 7 8 $172 9 10 11 12 13 $114 14 15 16 17 $101 18 $69 19 20 21 22 23 24 25 26 27 28 29 30
LowerHigherLowest this month

Lowest fares for the best day

  • Frontier AirlinesThu 19 Nov – Thu 26 Nov · 1 stop · 4h 29m $188
See all flights for these dates

Airport in Seattle

  • SEASeattle-Tacoma

Airport in San Francisco

  • SFOSan Francisco International

Watch this route

SFO
SEA

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More trips from San Francisco

All flights from San Francisco Seattle to San Francisco flights
Las Vegasfrom $63 ONTfrom $67 Los Angelesfrom $68 San Diegofrom $68 Phoenixfrom $111 Denverfrom $161 Dallasfrom $197 PDXfrom $202

FAQ

Questions about this route

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Help center Contact us
01What is the cheapest month to fly from San Francisco to Seattle?

Based on recently found fares, November 2026 has the lowest price we know of, from $69. Prices change often, so check the calendar for current fares.

02Are the prices on this page final?

No. They are recently found fares. When you open a deal, the partner shows the live price, including taxes and fees, before you pay.

03How can I get an alert when flights to Seattle get cheaper?

Use the price alert on this page. Choose your dates or a whole month and we will email you when the fare drops.