SFO → CUNSan Francisco to Cancún

live

Direct flights from San Francisco (SFO) to Cancún (CUN): 7 nonstop departures observed each week across 1 airline. The median arrival is 10 minutes late. No cancellations were recorded across the 3 tracked flights. The nonstop covers 3,871 km, an estimated 5 hours 28 minutes in the air. Measured by Pro Flight Search from live flight boards at San Francisco and Cancún. Updated 8 September 2026 at 06:55 UTC.

SFO San Francisco smooth · +3
CUN Cancún busy · +15
3,871 km · ~5h 28m est.
departs 08:517x weekly
Running clean · 1 airline · 7x weekly · nonstop
86 / 100

route health from live SFO and CUN delay boards

Median arrival delay is +10 min. 0 of 3 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival+10 minacross the last 3 operated legs
Flight time~5h 28mestimated from route distance
Weekly departures7x1 direct airline on the leg

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
United Airlines

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
United AirlinesUA

Flights UA1679 08:51 daily

History

operated legs · board outcomes
09-07UA1679dep −3 → arr+10
09-06UA1679dep −5 → arr+8
09-05UA1679dep −3 → arr+19

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
SFOSan Francisco +3 min smooth 🌤 clear · N 0 kt Full SFO delay board →
CUNCancún +15 min busy 🌤 mostly cloudy · N 0 kt Full CUN delay board →

Weather lens

Current conditions put the pressure at SFO: 53% odds of a 15+ minute delay and around +23 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the San Francisco to Cancún route actually runs

Pro Flight Search records official board updates for nonstop SFO to CUN 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 — San Francisco (SFO) to Cancún (CUN) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/SFO-CUN
How we measure this →

SFO to CUN questions

Is SFO–CUN running on time right now?

Smooth skies ahead. The arrival side at CUN is the weaker end, route health score 86/100. The airports section above carries the live status and delay window at both ends.

How long is the flight from SFO to CUN?

Great-circle distance is 3,871 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 303–362 min gate-to-gate on this route.

How often does SFO–CUN fly?

United Airlines runs the route with about 7 flights a week (daily). 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 SFO and arrival-side delay at CUN, 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.