MIA to BUF flight delays & on-time performance
Nonstop flights from Miami International Airport to Buffalo Niagara International Airport · 1,185 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at MIA or BUF right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Miami (MIA) to Buffalo (BUF) arrived on time 40% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0% were cancelled, and 40% arrived an hour or more late.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (66%).
Which airline is most on time from MIA to BUF?
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 |
|---|---|---|---|---|---|
| Delta Air Lines | 100% | 0.0% | 0 min | 0.0% | 1 |
| American Airlines | 50% | 0.0% | 32 min | 50.0% | 2 |
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 36% | 0.0% | 108 min | 40.9% | 22 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7pm55%11 flights
- 8pm18%11 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday100%0.0% cancelled
- Friday0%0.0% cancelled
- Saturday36%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)66%
- Late-arriving aircraft27%
- Air traffic control & airport congestion7%
- Extreme weather0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
No cancellation causes recorded in this period.
MIA to BUF: common questions
- How often are MIA to BUF flights on time?
- 40% 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 Miami to Buffalo cancelled?
- 0.0% of scheduled flights were cancelled (0 of 25).
- How long are typical delays?
- Across all flights the average arrival delay was 97 min (early arrivals count as zero). Flights that were late arrived 161 min behind schedule on average, and 40.0% of flights were an hour or more late.
- How long is taxi time at MIA?
- Flights on this route spent 26 min taxiing from the gate to takeoff on average.
Related routes
Return trip: BUF to MIA — 76% on time
More flights from Miami
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: MIA → BUF, nonstop flights by US airlines that report to the DOT. How we calculate this.