Route reliability record
BNA→LAS
Nashville to Las Vegas
- Flights
- 2,035
- Period
- September 2025 to August 2026
- Distance
- 1,587 mi
- Carriers
- 6
This route sits in the middle of the pack with a B+. Close to three flights in four arrive on time by the DOT's definition, about a point worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 2,035 BNA to LAS flights, with a median arrival 3 minutes early.
Best time to fly BNA to LAS: a 5am–8am departure, ideally on a Monday. Flights in that window arrived on time 93.3% of the time and Monday flights 78.9%, against 75.9% for the route overall.
The US average over the same twelve months is 77.3%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
75.9%
Arrivals under 15 minutes late, of 2,017 completed flights
Avg delay
57 min
Across delayed arrivals only, not all flights
Cancelled
0.79%
National rate is 1.89%
Best carrier
Southwest
75.6% on time across 1,783 flights
These figures cover 2,035 flights between September 2025 and August 2026. The median arrival is 3 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
Which airline is most reliable on BNA to LAS
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| American Airlinesthin sample | 2 | 100.0% | — | 0.00% | A+ |
| Allegiant Airthin sample | 2 | 100.0% | — | 0.00% | A+ |
| Spirit Airlinesthin sample | 198 | 79.8% | 94 min | 2.53% | B |
| Southwest Airlines | 1,783 | 75.6% | 49 min | 0.62% | B+ |
| Frontier Airlinesthin sample | 48 | 66.7% | 160 min | 0.00% | C+ |
| Delta Air Linesthin sample | 2 | 50.0% | 121 min | 0.00% | F+ |
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Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 40 points, against half a point between the best and worst carrier.
- 5am–8am513 flights93.3%
- 8am–11am172 flights87.1%
- 11am–2pm265 flights73.0%
- 2pm–5pm364 flights72.7%
- 5pm–8pm282 flights53.0%
- 8pm–5am439 flights70.0%
Scale runs 45% to 100%.
The 5pm–8pm window is where this operation falls apart: 53.0% on time, against 93.3% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5am–8am window is the busiest, with 513 flights scheduled in it.
Explore
Filter BNA to LAS by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On BNA to LAS, the best departure window is 5am–8am at 93.3% on time and the worst is 5pm–8pm at 53.0%, a wide gap of 40.3 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am93.3%
- 8–11am87.1%
- 11am–2pm73.0%
- 2–5pm72.7%
- 5–8pm53.0%
- 8pm–5am70.0%
best all US flightsScale 45% to 100%.
Across the year
When delays peak on this route
This route's year swings by 29 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
June is the worst month at 57.2% on time, 29 points below January, the best at 85.7%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. October was the busiest month here, with 222 flights.
Across the week, Monday is the strongest day at 78.9% on time and Friday the weakest at 71.2%, a spread of 8 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 53% of the 28,000 delay minutes carriers reported here, and the remaining four split what is left.
- 53%Late-arriving aircraft
- 31%Carrier
- 15%National Airspace System
- 1%Extreme weather
- 0%Security
53% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 28,000 reported delay minutes here, that single category outweighs weather by 38 to one. The split is drawn from 27,621 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 93.3% on time here.
Cancellations are rare at 0.79%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here actually costs
7.1% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
At 1,587 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The return leg runs 77.3% on time across 2,060 flights, within about a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 2,035 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Work out the risk of missing a connection in LAS after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. January runs 85.7% on time and June 57.2%, a swing of 29 points. If the dates move at all, move them out of June before you think about anything else. 2,017 completed flights over 12 months sit behind that.
Common questions
BNA to LAS questions
How often is BNA to LAS delayed?
About one flight in four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 24.1% of the 2,035 flights in this analysis, against 22.7% nationally. Delayed flights are late by about an hour on average.
How reliable is BNA to LAS compared with the rest of the country?
75.9% of flights arrive on time here against a national 77.3%, a difference of about a point against it. That is worth a B+ on this site's grading scale.
What time of day has the fewest delays on BNA to LAS?
The 5am–8am departure window is the strongest at 93.3% on time. The 5pm–8pm window is the weakest at 53.0%, 40 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are June delays on BNA to LAS?
June is the weakest month at 57.2% on time, compared with 85.7% in January. Across the year that is 29 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- LAS to BNA — the return legseparate record
- Nashville International (BNA) delay statistics
- Harry Reid International (LAS) delay statistics
- Spirit Airlines on BNA to LAS79.8%
- Southwest Airlines on BNA to LAS75.6%
- BNA to ORD, a related route70.9%
- LAX to LAS, a related route75.8%
- BNA to DCA, a related route71.3%
- American Airlines on-time record100.0%
- Allegiant Air on-time record100.0%
- Spirit Airlines on-time record79.8%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Direction matters. BNA to LAS and LAS to BNA are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.