Historical on-time performance
Miami to San Francisco
2,585 miData through Dec 2025Source: US DOT · BTS
Flights on MIA–SFO arrive on time 77% of the time over the last 12 months.
On-time rate77%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled0.1%of scheduled flights
based on 1,677 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-time77%Medianon timep9045 minCancel0.2%Flights619
- American AirlinesOn-time77%Medianon timep9050 minCancel0.1%Flights1,058
Why flights run late
Delay causes
- Airline30%
- Weather6%
- Air traffic (NAS)29%
- Late aircraft35%
- 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 MIA → SFO
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 84% on time.
- Mornings84% on time · p90 25 min · 1,590 flights
- Afternoons69% on time · p90 75 min · 203 flights
- Evenings59% on time · p90 90 min · 2,390 flights
- Overnights57% on time · p90 85 min · 308 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 64% to 74% on time.
- Tuesdays74% on time · p90 50 min · 637 flights
- Fridays72% on time · p90 60 min · 652 flights
- Saturdays69% on time · p90 65 min · 655 flights
- Mondays68% on time · p90 75 min · 657 flights
- Wednesdays68% on time · p90 60 min · 633 flights
- Thursdays65% on time · p90 90 min · 642 flights
- Sundays64% on time · p90 80 min · 652 flights
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