Golden Gate University-San Francisco to Oakland, CA buses and trains from $3

Here are some trips other travelers have found on Routefriend.
$3
0h 12m
0 stops
BART
$10
0h 42m
1 stop
BART Amtrak
$11
0h 40m
1 stop
BART Amtrak
$13
1h 6m
1 stop
Amtrak
$13
0h 57m
1 stop
BART Amtrak
$13
1h 12m
1 stop
BART Amtrak
$15
0h 58m
1 stop
BART Amtrak
$35
5h 3m
2 stops
BART Amtrak