Tokyo Narita to San Francisco is operated daily by United, ANA, and Japan Airlines. Distance is roughly 8,300 km (5,160 miles), with eastbound flight time around 9 hours 30 minutes and westbound around 11 hours.
Why this route matters
SFO is the closest US gateway to Japan, and the United/ANA joint venture combined with JAL service means the route is highly competitive on both pricing and schedules. Connections at SFO into the United domestic network are particularly strong.
Best time to book
- Cheapest: February, May, and October.
- Most expensive: Late June through August, plus the second half of December.