SFO to MIA flight delays & on-time performance
Nonstop flights from San Francisco International Airport to Miami International Airport · 2,585 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SFO or MIA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from San Francisco (SFO) to Miami (MIA) arrived on time 76% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.5% were cancelled, and 6% arrived an hour or more late.
- United Airlines was the most punctual airline here (78% on time); American Airlines was the least (76%).
- Departures scheduled around 7am did best (91% on time); around 9pm did worst (53%).
- Wednesday was the most reliable day to fly (80% on time) and Sunday the least (75%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (46%).
Which airline is most on time from SFO to MIA?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 78% | 0.0% | 10 min | 3.4% | 613 |
| American Airlines | 76% | 0.8% | 21 min | 7.4% | 1,133 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am89%44 flights
- 7am91%173 flights
- 8am74%453 flights
- 11am61%62 flights
- 12pm73%103 flights
- 1pm69%212 flights
- 9pm53%72 flights
- 10pm82%211 flights
- 11pm80%416 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday76%1.6% cancelled
- Tuesday77%1.3% cancelled
- Wednesday80%0.8% cancelled
- Thursday75%0.0% cancelled
- Friday75%0.0% cancelled
- Saturday76%0.0% cancelled
- Sunday75%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)46%
- Late-arriving aircraft32%
- Air traffic control & airport congestion22%
- Extreme weather1%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather89%
- Air traffic control & airport congestion11%
- Airline (crew, maintenance, cleaning, fueling)0%
- Security0%
SFO to MIA: common questions
- How often are SFO to MIA flights on time?
- 76% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from San Francisco to Miami cancelled?
- 0.5% of scheduled flights were cancelled (9 of 1,746).
- How long are typical delays?
- Across all flights the average arrival delay was 17 min (early arrivals count as zero). Flights that were late arrived 67 min behind schedule on average, and 6.0% of flights were an hour or more late.
- How long is taxi time at SFO?
- Flights on this route spent 23 min taxiing from the gate to takeoff on average.
Related routes
Return trip: MIA to SFO — 70% on time
More flights from San Francisco
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SFO → MIA, nonstop flights by US airlines that report to the DOT. How we calculate this.