Route reliability record
PHX→LAS
Phoenix to Las Vegas
- Flights
- 6,017
- Period
- September 2025 to August 2026
- Distance
- 255 mi
- Carriers
- 5
This route lands a B, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 6,017 PHX to LAS flights, of which Frontier Airlines flew 846 at 79.6% on time.
Best time to fly PHX to LAS: a 5am–8am departure, ideally on a Saturday. Flights in that window arrived on time 93.6% of the time and Saturday flights 86.3%, against 77.5% for the route overall.
Frontier Airlines is the most reliable of the three carriers covered here at 79.6% on time across 846 flights.
Key figures
On time
77.5%
Arrivals under 15 minutes late, of 5,948 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
1.06%
National rate is 1.89%
Best carrier
Frontier
79.6% on time across 846 flights
These figures cover 6,017 flights between September 2025 and August 2026. The median arrival is 5 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 PHX to LAS
The three carriers here are closely matched: 3 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Airthin sample | 1 | 100.0% | — | 0.00% | A+ |
| SkyWest Airlinesthin sample | 20 | 95.0% | 90 min | 0.00% | A+ |
| Frontier Airlines | 846 | 79.6% | 114 min | 1.06% | B |
| American Airlines | 1,684 | 77.4% | 73 min | 0.95% | B+ |
| Southwest Airlines | 3,466 | 76.9% | 52 min | 1.13% | B |
No carrier stands out. Frontier tops the table at 79.6%, 3 points clear of the bottom, which is inside the range this kind of sample moves year to year.
Flight by flight
Flights on PHX to LAS
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
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Best ways to make this trip
The most reliable ways to fly Phoenix to Las Vegas
Every airline on this route, ranked by how often a scheduled flight actually operated and arrived on time, with its best departure time and most punctual flight number. No nearby airport pair beat these.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. PHX → LASPhoenix to Las Vegas | Frontier Airlines | 78.8% | 79.6% | 1.06% | 11am–2pm, Sat | F9 4113 21:58 |
| 2. PHX → LASPhoenix to Las Vegas | American Airlines | 76.7% | 77.4% | 0.95% | 5am–8am, Wed | AA 1611 09:00 |
| 3. PHX → LASPhoenix to Las Vegas | Southwest Airlines | 76.0% | 76.9% | 1.13% | 5am–8am, Sat | — |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
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 29 points, against 3 points between the best and worst carrier.
- 5am–8am898 flights93.6%
- 8am–11am1,243 flights87.1%
- 11am–2pm1,033 flights78.1%
- 2pm–5pm849 flights68.7%
- 5pm–8pm866 flights65.1%
- 8pm–5am1,128 flights69.4%
Scale runs 55% to 100%.
Book the early departure. Flights leaving between 5am–8am arrive on time 93.6% of the time, against 65.1% for the evening window. That is 29 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 1,243 flights scheduled in it.
Explore
Filter PHX 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 PHX to LAS, the best departure window is 5am–8am at 93.6% on time and the worst is 5pm–8pm at 65.1%, a wide gap of 28.5 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am93.6%
- 8–11am87.1%
- 11am–2pm78.1%
- 2–5pm68.7%
- 5–8pm65.1%
- 8pm–5am69.4%
best all US flightsScale 55% to 100%.
Across the year
When delays peak on this route
This route's year swings by 15 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.
July is the worst month at 70.5% on time, 15 points below February, the best at 85.4%. 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. May was the busiest month here, with 547 flights.
Across the week, Saturday is the strongest day at 86.3% on time and Thursday the weakest at 72.6%, a spread of 14 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 54% of the 88,000 delay minutes carriers reported here, and the remaining four split what is left.
- 54%Late-arriving aircraft
- 27%Carrier
- 17%National Airspace System
- 2%Extreme weather
- 0%Security
54% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 88,000 reported delay minutes here, that single category outweighs weather by 27 to one. The split is drawn from 87,989 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 93.6% on time here.
Cancellations sit at 1.06% against a national 1.89%, which is ordinary. Diversions add another 0.08%.
Connections and stage length
What a delay here actually costs
7.9% 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 255 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5am–8am window matters as much as it does.
The return leg runs 77.3% on time across 6,012 flights, within half 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 6,017 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. February runs 85.4% on time and July 70.5%, a swing of 15 points. If the dates move at all, move them out of July before you think about anything else. 5,948 completed flights over 12 months sit behind that.
Common questions
PHX to LAS questions
How often is PHX to LAS delayed?
Roughly 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 22.5% of the 6,017 flights in this analysis, against 22.7% nationally. Delayed flights are late by about an hour on average.
Which airline is most reliable on PHX to LAS?
Frontier Airlines leads at 79.6% on time across 846 flights. Southwest Airlines is at the other end on 76.9%, a gap of 3 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on PHX to LAS?
The 5am–8am departure window is the strongest at 93.6% on time. The 5pm–8pm window is the weakest at 65.1%, 29 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 July delays on PHX to LAS?
July is the weakest month at 70.5% on time, compared with 85.4% in February. Across the year that is 15 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 PHX — the return legseparate record
- Phoenix Sky Harbor International (PHX) delay statistics
- Harry Reid International (LAS) delay statistics
- Frontier Airlines on PHX to LAS79.6%
- American Airlines on PHX to LAS77.4%
- Southwest Airlines on PHX to LAS76.9%
- PHX to DEN, a related route76.7%
- LAX to LAS, a related route75.8%
- PHX to LAX, a related route82.1%
- Envoy Air on-time record100.0%
- SkyWest Airlines on-time record95.0%
- Frontier Airlines on-time record79.6%
- 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. PHX to LAS and LAS to PHX 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.