Route reliability record
DFW→LAS
Dallas-Fort Worth to Las Vegas
- Flights
- 5,138
- Period
- September 2025 to August 2026
- Distance
- 1,055 mi
- Carriers
- 3
This route sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 5,138 DFW to LAS flights, of which Frontier Airlines flew 879 at 73.7% on time.
Best time to fly DFW to LAS: a 5am–8am departure, ideally on a Wednesday. Flights in that window arrived on time 86.6% of the time and Wednesday flights 78.7%, against 68.8% for the route overall.
The national on-time rate over the same period is 77.3%, so this route runs 9 points behind the country as a whole. Across a thousand flights that is about 85 extra late arrivals.
Key figures
On time
68.8%
Arrivals under 15 minutes late, of 5,004 completed flights
Avg delay
70 min
Across delayed arrivals only, not all flights
Cancelled
2.41%
National rate is 1.89%
Best carrier
Frontier
73.7% on time across 879 flights
These figures cover 5,138 flights between September 2025 and August 2026. Beyond the headline rate, 11.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Which airline is most reliable on DFW to LAS
The choice of carrier is not cosmetic here. Frontier Airlines arrives on time 73.7% of the time; American Airlines manages 67.1%. Sample sizes sit next to every figure, because a two-point gap across 4,003 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Spirit Airlinesthin sample | 256 | 78.5% | 96 min | 1.95% | B |
| Frontier Airlines | 879 | 73.7% | 70 min | 1.93% | C |
| American Airlines | 4,003 | 67.1% | 69 min | 2.55% | C |
Frontier leads American by 7 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.
Flight by flight
Flights on DFW 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 Dallas-Fort Worth to Las Vegas
Every airline on this route and on the routes between nearby airports, ranked by how often a scheduled flight actually operated and arrived on time. 1 of the top 3 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. DAL → LASDallas to Las Vegas | Southwest Airlines | 73.7% | 74.6% | 1.19% | 5am–8am, Tue | — |
| 2. DFW → LASDallas-Fort Worth to Las Vegas | Frontier Airlines | 72.3% | 73.7% | 1.93% | 5am–8am, Wed | F9 3885 22:45 |
| 3. DFW → LASDallas-Fort Worth to Las Vegas | American Airlines | 65.4% | 67.1% | 2.55% | 5am–8am, Wed | AA 1584 08:25 |
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 25 points, against 7 points between the best and worst carrier.
- 5am–8am411 flights86.6%
- 8am–11am566 flights84.4%
- 11am–2pm968 flights70.7%
- 2pm–5pm726 flights68.9%
- 5pm–8pm1,050 flights61.8%
- 8pm–5am1,417 flights61.2%
Scale runs 55% to 90%.
The 8pm–5am window is where this operation falls apart: 61.2% on time, against 86.6% 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 8pm–5am window is the busiest, with 1,417 flights scheduled in it.
Explore
Filter DFW 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 DFW to LAS, the best departure window is 5am–8am at 86.6% on time and the worst is 8pm–5am at 61.2%, a wide gap of 25.4 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am86.6%
- 8–11am84.4%
- 11am–2pm70.7%
- 2–5pm68.9%
- 5–8pm61.8%
- 8pm–5am61.2%
best all US flightsScale 55% to 95%.
Across the year
When delays peak on this route
This route's year swings by 24 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 53.6% on time, 24 points below March, the best at 77.6%. 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 476 flights.
Across the week, Wednesday is the strongest day at 78.7% on time and Sunday the weakest at 61.3%, a spread of 17 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 54% of the 109,000 delay minutes carriers reported here, and the remaining four split what is left.
- 54%Late-arriving aircraft
- 27%Carrier
- 14%National Airspace System
- 5%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 109,000 reported delay minutes here, that single category outweighs weather by 11 to one. The split is drawn from 109,195 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 86.6% on time here.
Cancellations sit at 2.41% against a national 1.89%, which is ordinary. Diversions add another 0.19%.
Connections and stage length
What a delay here actually costs
11.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 1,055 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg is a different operation and performs like one: it runs 79.9% on time across 5,142 flights, 11 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 11 points of difference.
The sample behind these figures is 5,138 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. March runs 77.6% on time and June 53.6%, a swing of 24 points. If the dates move at all, move them out of June before you think about anything else. 5,004 completed flights over 12 months sit behind that.
Common questions
DFW to LAS questions
How often is DFW to LAS delayed?
About one flight in three arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 31.2% of the 5,138 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on DFW to LAS?
Frontier Airlines leads at 73.7% on time across 879 flights. American Airlines is at the other end on 67.1%, a gap of 7 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 DFW to LAS?
The 5am–8am departure window is the strongest at 86.6% on time. The 8pm–5am window is the weakest at 61.2%, 25 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 DFW to LAS?
June is the weakest month at 53.6% on time, compared with 77.6% in March. Across the year that is 24 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 DFW — the return legseparate record
- Dallas/Fort Worth International (DFW) delay statistics
- Harry Reid International (LAS) delay statistics
- Spirit Airlines on DFW to LAS78.5%
- Frontier Airlines on DFW to LAS73.7%
- American Airlines on DFW to LAS67.1%
- DFW to ORD, a related route68.8%
- LAX to LAS, a related route75.8%
- DFW to ATL, a related route75.6%
- Spirit Airlines on-time record78.5%
- Frontier Airlines on-time record73.7%
- American Airlines on-time record67.1%
- 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. DFW to LAS and LAS to DFW 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.