Delta Air Lines has a low $611.66 round trip fare from San Francisco SFO to Tokyo Haneda HND for departures in April and May. The fare to Tokyo rises to a low of $800 to over $1,000 for June and July before dropping back to $712 for August and September. There are a few $612 dates in October and November, but the bulk of the low fares with this sale are April and May departures from San Francisco.
The Delta Air Lines flights route from SFO to either Los Angeles or Seattle, however, the ticket prices are lowest with Star Alliance at $747 to $800 from Seattle and $767 to over $800 from LAX with Star Alliance carriers.
Star Alliance has a SFO-Tokyo $697 fare on Air Canada for dates in April and May for Star Alliance flyers and Cathay Pacific is around $800 for the lowest Oneworld Alliance for flights to Tokyo NRT.
Delta Air Lines San Francisco SFO – Los Angeles LAX – Tokyo Haneda HND
$611.66 Monday May 2 – Thursday May 12
This is a good fare from California to Tokyo on a major carrier.