82% of flights from Raleigh to Las Vegas arrived on time over the past 12 months. That is about the typical U.S. route. The 6 a.m. departures ran on time 89% of the time; the 7 a.m. ones 89%. Most reliable airline: Delta Air Lines (88%). 4% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for RDU → LAS: when a flight was late, it was under 45 minutes late 67% of the time. About 1 in 31 flights landed an hour or more late; 0.9% were cancelled outright.
- On time or early82%
- 15–30 min late7.9%
- 30–60 min late6.1%
- 1–2 hours late2.2%
- 2–3 hours late0.9%
- 3+ hours late0.2%
- Diverted0.0%
- Cancelled0.9%
Share of all 554 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| Southwest Airlines | 282 | 76% | 0.7% | −3 min | 3.9% | +42 min | Southwest Airlines |
| Delta Air Lines | 272 | 88% | 1.1% | −11 min | 2.6% | +49 min | Delta Air Lines |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at RDU). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | Delta Air Lines |
|---|---|
| 7 a.m. | 89% |
By month
Each calendar month pooled over 2023–2026. Best: April (89%). Worst: January (77%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 81 | — | — |
| Tuesday | 75 | — | — |
| Wednesday | 72 | — | — |
| Thursday | 75 | — | — |
| Friday | 76 | — | — |
| Saturday | 83 | — | — |
| Sunday | 92 | — | — |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: weather 3 · airline 2
Month by month
Not enough months with data to draw a trend.
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Jan 26, 2026 | 3 | 33% | 1 |
Questions
How often are flights from RDU to LAS on time?
82% of 554 scheduled flights from Raleigh/Durham, NC to Las Vegas, NV arrived within 15 minutes of schedule between September 2025 and August 2026. 0.9% were cancelled.
What is the best time of day to fly RDU to LAS?
Flights scheduled to leave at 6 a.m. were the most reliable (89% on time). The 7 a.m. departures were the least (89%).
Which airline is most on time from RDU to LAS?
Delta Air Lines: 88% of its 272 flights on the route arrived on time. Southwest Airlines: 76%.
What month has the most delays from RDU to LAS?
January (77% on time). The best month is April (89%), over 2023–2026.
Related
- LAS → RDU (return)
- Raleigh-Durham (RDU) delays by hour
- Flights into Las Vegas Harry Reid (LAS)
- Southwest Airlines on-time record
- Delta Air Lines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.