
The Different Flight Options between San Francisco and Seattle
There are several flight options that exist between San Fransisco and Seattle. The different airline companies that are operating flights between these two destinations are American Airlines, Alaska Airlines, Delta Airlines, United Airlines and US Airways.
http://www.farecompare.com/flights/San_Francisco-SFO/Seattle-SEA/market.html
The maximum number of nonstop flights between these two destinations is available from American Airlines. However, in all there are a total of 14 airline companies that are providing flight services between these two destinations.
Another airline company that has a good number of nonstop flights between these destinations is Aer Lingus. On a weekly basis, there are 419 flights that are available between San Fransisco and Seattle. On a daily basis, around 156,380 seats are available on the flights connecting between San Fransisco and Seattle.

