United AirlinesUA
Flights UA3871 varies Mo Th Sa
live
Direct flights from Xiamen (XMN) to San Francisco (SFO): 3 nonstop departures observed each week across 1 airline. 2 of the 2 tracked flights were cancelled. The nonstop covers 10,653 km, an estimated 14 hours 9 minutes in the air. Measured by Pro Flight Search from live flight boards at Xiamen and San Francisco. Updated 17 September 2026 at 21:54 UTC.
XMN
Xiamen
tracking
SFO
San Francisco
heavy · +48
10,653 km · ~14h 09m est.
Disrupted · 1 airline · 3x weekly · nonstop
36 / 100
route health from live XMN and SFO delay boards
2 of 2 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Flight time~14h 09mestimated from route distance
Weekly departures3x1 direct airline on the leg
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsnext sweep in 120s
How the Xiamen to San Francisco route actually runs
Pro Flight Search records official board updates for nonstop XMN to SFO flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search — Xiamen (XMN) to San Francisco (SFO) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/XMN-SFO
XMN to SFO questions
Is XMN–SFO running on time right now?
Significant delay risk. The arrival side at SFO is the weaker end, route health score 36/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from XMN to SFO?
Great-circle distance is 10,653 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 782–943 min gate-to-gate on this route.
How often does XMN–SFO fly?
United Airlines runs the route with about 3 flights a week (mon, thu, sat). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at XMN and arrival-side delay at SFO, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.
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