Southwest AirlinesWN
Flights WN854 12:00 Mo Th Fr Su
live
Direct flights from Las Vegas (LAS) to Buffalo (BUF): 4 nonstop departures observed each week across 1 airline. The median arrival is on schedule. No cancellations were recorded across the 4 tracked flights. The nonstop covers 3,189 km, an estimated 4 hours 35 minutes in the air. Measured by Pro Flight Search from live flight boards at Las Vegas and Buffalo. Updated 12 November 2026 at 08:23 UTC.
Today, LAS → BUF
Thu 12 Nov · local times- 12:00 WN854Southwest On scheduleGate C24 · T1 ·
Checked LAS board 00:23 · BUF board 22:18
LAS
Las Vegas
smooth · +0
BUF
Buffalo
smooth · +0
3,189 km · ~4h 35m est.
Running clean · 1 airline · 4x weekly · nonstop
75 / 100
route health from live LAS and BUF delay boards
Median arrival delay is +0 min. 0 of 4 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+0 minacross the last 4 arrivals
Flight time~4h 35mestimated from route distance
Weekly departures4x1 direct airline on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Southwest Airlines
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Conditions are tightest at LAS and BUF: a 42% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +9 min. Both figures come from the two airports' delay records in similar weather. See live delays → · Weather risk by airport →
next sweep in 120s
How the Las Vegas to Buffalo route actually runs
Pro Flight Search records official board updates for nonstop LAS to BUF flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search: Las Vegas (LAS) to Buffalo (BUF) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/LAS-BUF
LAS to BUF questions
Is LAS–BUF running on time right now?
Mostly on schedule. Both endpoints currently score the same, route health score 75/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from LAS to BUF?
Great-circle distance is 3,189 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 255–303 min gate-to-gate on this route.
How often does LAS–BUF fly?
Southwest Airlines runs the route with about 4 flights a week (sun, mon, thu, fri). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at LAS and arrival-side delay at BUF, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.
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