SFO → CUNSan Francisco to Cancún

live

Direct flights from San Francisco (SFO) to Cancún (CUN): 14 nonstop departures observed each week across 1 airline. 80% of the last 10 tracked flights arrived within 15 minutes of schedule. The median arrival is on schedule. No cancellations were recorded across the 11 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 1 November 2026 at 18:39 UTC.

Today, SFO → CUN

Sun 1 Nov · local times
  1. 08:45 UA1679United Airlines Left 08:43 CUN 17:08In the air · scheduled landing

Checked SFO board 10:38 · CUN board 13:39

SFO San Francisco smooth · +0
CUN Cancún smooth · +0
3,871 km · ~5h 28m est.
dep bank 08:45–23:0014x weekly
Runs reliable · 1 airline · 14x weekly · nonstop
80% on time

of the last 10 tracked SFO → CUN flights arrived within 15 minutes

Median arrival delay is +0 min. 0 of 11 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival+0 minacross the last 10 arrivals
Flight time~5h 28mestimated from route distance
Weekly departures14x1 direct airline on the leg
Cancelled0.0%recent route rate · 0 of 11

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 AirlinesUA80% on time

Flights UA1679 varies daily · UA1145 23:00 daily

History

operated legs · board outcomes
11-01UA1679departed−2
10-31UA1054dep −3 → arr−30
10-31UA1145dep −7 → arr+0
10-31UA1679dep +0 → arr−8
10-30UA1145dep +7 → arr+0
10-30UA1679dep −9 → arr+0
10-29UA1145dep +9 → arr+10
10-29UA1679dep −8 → arr+0
10-28UA1145dep +8 → arr+53
10-28UA1679dep +4 → arr+20
10-27UA1145arrived−17

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 +0 min smooth 🌤 few clouds · NE 6 kt Full SFO delay board →
CUNCancún +0 min smooth 🌤 scattered clouds · ESE 4 kt Full CUN delay board →

Weather lens

Conditions are tightest at SFO: a 40% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +11 min. Both figures come from the two airports' delay records in similar weather. 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. Both endpoints currently score the same, route health score 100/100. 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 14 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.