Route reliability record
LAS→DFW
Las Vegas to Dallas-Fort Worth
- Flights
- 63,561
- Period
- June 2025 to May 2026
- Distance
- 1,053 mi
- Carriers
- 2
This route lands a B, level with the national rate of 75.9%. About one flight in four arrive 15 minutes late or worse, and those flights are late by roughly 55 minutes on average. That is a workable record, not a spotless one. That rests on 63,561 flights, of which Republic Airways flew 44,346 at 77.7% on time.
The US average over the same twelve months is 75.9%, 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
76.6%
Arrivals under 15 minutes late, of 62,035 completed flights
Avg delay
53 min
Across delayed arrivals only, not all flights
Cancelled
2.18%
National rate is 2.23%
Best carrier
Republic
77.7% on time across 44,346 flights
These figures cover 64,000 flights between June 2025 and May 2026. Beyond the headline rate, 9.2% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
Which airline is most reliable on LAS to DFW
The two carriers here are closely matched: 4 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 |
|---|---|---|---|---|---|
| Republic Airways | 44,346 | 77.7% | 47 min | 1.77% | B |
| JetBlue Airways | 19,215 | 74.1% | 49 min | 3.10% | C− |
JetBlue Airways cancels 3.1% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Departure window
The best time of day to leave
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 64,000 flights.
- 5am–8am9,852 flights80.6%
- 8am–11am13,030 flights78.6%
- 11am–2pm11,759 flights76.9%
- 2pm–5pm11,124 flights74.8%
- 5pm–8pm11,441 flights73.0%
- 8pm–5am6,357 flights75.6%
Scale runs 65% to 85%. Rows with fewer than 30 flights show a dash.
The early departures do better, though not dramatically: 80.6% on time for the 5am–8am window against 73.0% for 5pm–8pm. Worth taking if the schedule allows, not worth an extra connection.
Across the year
When delays peak on this route
Twelve months, one bar each, drawn from the same 63,561 flights. The strip shows how much of this route's record is set by the calendar rather than by the operation.
July is the worst month at 72.1% on time, 11 points below September, the best at 82.6%. 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.
The day of the week is close to irrelevant here: 2 points separates the best day from the worst. Weekly demand peaks are not what drives the delays on this operation.
Delay causes
Why this route gets delayed
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 766,000 reported delay minutes.
- 42%National Airspace System
- 31%Late-arriving aircraft
- 20%Carrier
- 7%Extreme weather
- 0%Security
42% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 320,000 minutes out of 766,000, against a national NAS share of 30%.
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 80.6% on time here.
Cancellations sit at 2.18% against a national 2.23%, which is ordinary. Diversions add another 0.22%.
Connections and stage length
What a delay here actually costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.2% of arrivals land a full hour or more behind schedule, against 8.6% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
The 1,053 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg runs 78.6% on time across 46,197 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
63,561 flights sit behind these numbers, which is a large enough sample that the headline rate is not moving on noise. Where a sub-group falls below 30 flights the site shows a dash instead of a percentage.
What to do with this
Booking this route
Put together: take the 5am–8am departure, avoid July if the dates are flexible, and if two carriers are within a few dollars of each other, Republic is the one with the record behind it. None of that guarantees an on-time arrival; it moves the odds by 8 points, which is the most any booking decision can do.
Common questions
LAS to DFW questions
How often is LAS to DFW delayed?
About one flight in four arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 23.4% of the 63,561 flights in this analysis, against 24.1% nationally. Delayed flights are late by roughly 55 minutes on average.
Which airline is most reliable on LAS to DFW?
Republic Airways leads at 77.7% on time across 44,346 flights. JetBlue Airways is at the other end on 74.1%, a gap of 4 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 LAS to DFW?
The 5am–8am departure window is the strongest at 80.6% on time. The 5pm–8pm window is the weakest at 73.0%, 8 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 LAS to DFW?
July is the weakest month at 72.1% on time, compared with 82.6% in September. Across the year that is 11 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
- DFW to LAS — the return legseparate record
- Harry Reid International (LAS) delay statistics
- Dallas/Fort Worth International (DFW) delay statistics
- Republic Airways on-time record77.7%
- JetBlue Airways on-time record74.1%
- Connecting flights: how much buffer the data says you need
- Worst months to fly in the US, ranked by the data
Direction matters. LAS to DFW and DFW to LAS are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, June 2025 to May 2026. Updated monthly. How this data is collected.