BNA to BUF flight delays & on-time performance
Nonstop flights from Nashville International Airport to Buffalo Niagara International Airport · 633 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at BNA or BUF right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Nashville (BNA) to Buffalo (BUF) arrived on time 75% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.8% were cancelled, and 4% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 10am did best (91% on time); around 4pm did worst (53%).
- Tuesday was the most reliable day to fly (90% on time) and Thursday the least (63%).
- The largest source of delay minutes was late-arriving aircraft (49%).
Which airline is most on time from BNA 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 |
|---|---|---|---|---|---|
| Southwest Airlines | 75% | 0.8% | 13 min | 4.4% | 370 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 10am91%70 flights
- 11am74%81 flights
- 12pm90%48 flights
- 1pm64%58 flights
- 2pm69%49 flights
- 3pm70%43 flights
- 4pm53%15 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday71%1.9% cancelled
- Tuesday90%0.0% cancelled
- Wednesday79%0.0% cancelled
- Thursday63%0.0% cancelled
- Friday75%0.0% cancelled
- Saturday75%1.8% cancelled
- Sunday75%1.9% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft49%
- Airline (crew, maintenance, cleaning, fueling)43%
- Air traffic control & airport congestion7%
- Extreme weather1%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather100%
- Airline (crew, maintenance, cleaning, fueling)0%
- Air traffic control & airport congestion0%
- Security0%
BNA to BUF: common questions
- How often are BNA to BUF flights on time?
- 75% 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 Nashville to Buffalo cancelled?
- 0.8% of scheduled flights were cancelled (3 of 370).
- How long are typical delays?
- Across all flights the average arrival delay was 13 min (early arrivals count as zero). Flights that were late arrived 48 min behind schedule on average, and 4.4% of flights were an hour or more late.
- How long is taxi time at BNA?
- Flights on this route spent 14 min taxiing from the gate to takeoff on average.
Related routes
Return trip: BUF to BNA — 78% on time
More flights from Nashville
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: BNA → BUF, nonstop flights by US airlines that report to the DOT. How we calculate this.