DEN to LAS flight delays & on-time performance
Nonstop flights from Denver International Airport to Harry Reid International Airport · 628 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at DEN or LAS right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Denver (DEN) to Las Vegas (LAS) arrived on time 76% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.6% were cancelled, and 8% arrived an hour or more late.
- United Airlines was the most punctual airline here (80% on time); Southwest Airlines was the least (72%).
- Departures scheduled around 6am did best (96% on time); around 7pm did worst (61%).
- Tuesday was the most reliable day to fly (82% on time) and Friday the least (70%).
- The largest source of delay minutes was late-arriving aircraft (49%).
Which airline is most on time from DEN to LAS?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 80% | 0.3% | 14 min | 7.1% | 2,392 |
| Frontier Airlines | 76% | 0.9% | 19 min | 8.9% | 1,598 |
| Southwest Airlines | 72% | 0.7% | 17 min | 8.7% | 3,143 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am98%119 flights
- 6am96%303 flights
- 7am91%550 flights
- 8am92%396 flights
- 9am84%480 flights
- 10am80%379 flights
- 11am81%541 flights
- 12pm78%309 flights
- 1pm75%539 flights
- 2pm70%219 flights
- 3pm70%324 flights
- 4pm68%581 flights
- 5pm65%459 flights
- 6pm75%209 flights
- 7pm61%690 flights
- 8pm67%459 flights
- 9pm52%193 flights
- 10pm71%381 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday72%0.5% cancelled
- Tuesday82%0.4% cancelled
- Wednesday81%0.3% cancelled
- Thursday70%0.1% cancelled
- Friday70%1.1% cancelled
- Saturday82%0.6% cancelled
- Sunday76%1.1% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft49%
- Airline (crew, maintenance, cleaning, fueling)27%
- Air traffic control & airport congestion23%
- Extreme weather2%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)40%
- Extreme weather30%
- Air traffic control & airport congestion30%
- Security0%
DEN to LAS: common questions
- How often are DEN to LAS flights on time?
- 76% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Denver to Las Vegas cancelled?
- 0.6% of scheduled flights were cancelled (43 of 7,133).
- How long are typical delays?
- Across all flights the average arrival delay was 16 min (early arrivals count as zero). Flights that were late arrived 62 min behind schedule on average, and 8.2% of flights were an hour or more late.
- How long is taxi time at DEN?
- Flights on this route spent 19 min taxiing from the gate to takeoff on average.
Related routes
Return trip: LAS to DEN — 77% on time
More flights from Denver
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: DEN → LAS, nonstop flights by US airlines that report to the DOT. How we calculate this.