LAS to BUF flight delays & on-time performance
Nonstop flights from Harry Reid International Airport to Buffalo Niagara International Airport · 1,986 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at LAS or BUF right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Las Vegas (LAS) to Buffalo (BUF) arrived on time 72% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.7% were cancelled, and 8% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 10am did best (81% on time); around 4pm did worst (57%).
- Wednesday was the most reliable day to fly (82% on time) and Sunday the least (55%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (49%).
Which airline is most on time from LAS 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 | 72% | 0.7% | 15 min | 7.7% | 302 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 8am77%71 flights
- 9am90%10 flights
- 10am81%47 flights
- 12pm65%31 flights
- 2pm62%40 flights
- 3pm72%43 flights
- 4pm57%44 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday72%2.3% cancelled
- Tuesday73%0.0% cancelled
- Wednesday82%0.0% cancelled
- Thursday65%0.0% cancelled
- Friday77%0.0% cancelled
- Saturday77%0.0% cancelled
- Sunday55%2.3% 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)49%
- Late-arriving aircraft41%
- Air traffic control & airport congestion9%
- Extreme weather0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather100%
- Airline (crew, maintenance, cleaning, fueling)0%
- Air traffic control & airport congestion0%
- Security0%
LAS to BUF: common questions
- How often are LAS to BUF flights on time?
- 72% 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 Las Vegas to Buffalo cancelled?
- 0.7% of scheduled flights were cancelled (2 of 302).
- How long are typical delays?
- Across all flights the average arrival delay was 15 min (early arrivals count as zero). Flights that were late arrived 46 min behind schedule on average, and 7.7% of flights were an hour or more late.
- How long is taxi time at LAS?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Return trip: BUF to LAS — 82% on time
More flights from Las Vegas
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: LAS → BUF, nonstop flights by US airlines that report to the DOT. How we calculate this.