Historical on-time performance
San Francisco to Miami
2,585 miData through Dec 2025Source: US DOT · BTS
Flights on SFO–MIA arrive on time 83% of the time over the last 12 months.
On-time rate83%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled0.1%of scheduled flights
based on 1,676 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- United AirlinesOn-time81%Medianon timep9025 minCancel0.0%Flights620
- American AirlinesOn-time83%Medianon timep9025 minCancel0.1%Flights1,056
Why flights run late
Delay causes
- Airline34%
- Weather1%
- Air traffic (NAS)25%
- Late aircraft41%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SFO → MIA
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 76% to 88% on time.
- Early mornings88% on time · p90 30 min · 67 flights · limited
- Overnights82% on time · p90 30 min · 1,706 flights
- Mornings81% on time · p90 30 min · 1,820 flights
- Middays76% on time · p90 40 min · 936 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 83% on time.
- Tuesdays83% on time · p90 25 min · 635 flights
- Saturdays83% on time · p90 25 min · 651 flights
- Fridays81% on time · p90 35 min · 651 flights
- Wednesdays81% on time · p90 25 min · 636 flights
- Mondays81% on time · p90 35 min · 654 flights
- Thursdays79% on time · p90 40 min · 647 flights
- Sundays75% on time · p90 45 min · 655 flights
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