Route on-time record

DEN to LAS: most on-time flights and the best time to fly

Denver (Denver International Airport) to Las Vegas (Harry Reid International Airport). 7,066 nonstop flights in Jun 2025 to May 2026, 75% arrived within 15 minutes and 0.7% were cancelled. The most reliable flight number was Southwest 1894 at 6:00 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

DEN → LAS

Denver to Las Vegas: 7,066 nonstop flights a year

On time (12 months)

75%

Cancelled

0.7%

avg delay 16 min

Best time to leave

Before 9 AM

93% on time vs 65% 6 to 9 PM

Most reliable airline

United

78% chance on time

Check DEN to LAS fares

Lowest nonstop fare seen in the next two months: $77 (Frontier 2349 on 2026-11-26). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Most reliable nonstop flights

Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.

#1 · Southwest 1894
6:00 AM → 6:55 AM1h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31.
94%
chance on time
On time (history)
98%
Cancelled
0.0%
Avg arrival delay
1 min
- Arrived on time 98% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 65%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Limited track record · 55 flights
Find Southwest 1894 fares Opens this date on Aviasales
#2 · United 2316
8:00 AM → 9:07 AM2h 08m nonstop
Local times, typical schedule. Last flown 2026-05-31.
93%
chance on time
On time (history)
94%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 94% of the time (338 flights, Jun 2025 to May 2026).
- Never cancelled in 338 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 65%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Strong track record · 338 flights
Find United 2316 fares Opens this date on Aviasales
#3 · Southwest 2201
6:40 AM → 7:45 AM2h 05m nonstop
Local times, typical schedule. Last flown 2026-04-06.
93%
chance on time
On time (history)
100%
Cancelled
0.0%
Avg arrival delay
0 min
- Arrived on time 100% of the time (28 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 65%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Short track record (28 flights), so its score leans on the airline's record at this hour.
Limited track record · 28 flights
Find Southwest 2201 fares Opens this date on Aviasales
#4 · Southwest 1895
7:10 AM → 8:10 AM1h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31.
91%
chance on time
On time (history)
96%
Cancelled
0.0%
Avg arrival delay
2 min
- Arrived on time 96% of the time (47 flights, Jun 2025 to May 2026).
- Never cancelled in 47 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 65%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Limited track record · 47 flights
Find Southwest 1895 fares Opens this date on Aviasales
#5 · Southwest 2543
5:30 AM → 6:35 AM2h 10m nonstop
Local times, typical schedule. Last flown 2026-04-06.
90%
chance on time
On time (history)
97%
Cancelled
0.0%
Avg arrival delay
1 min
- Arrived on time 97% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 65%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Limited track record · 33 flights
Find Southwest 2543 fares Opens this date on Aviasales
#6 · Southwest 1526
8:40 AM → 9:35 AM1h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 2924; its record covers all of them.
89%
chance on time
On time (history)
91%
Cancelled
0.0%
Avg arrival delay
6 min
- Arrived on time 91% of the time (80 flights, Jun 2025 to May 2026).
- Never cancelled in 80 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 65%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Moderate track record · 80 flights
Find Southwest 1526 fares Opens this date on Aviasales
#7 · Frontier 2015
6:00 AM → 7:04 AM2h 04m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
On time (history)
90%
Cancelled
1.6%
Avg arrival delay
9 min
- Arrived on time 90% of the time (244 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 65%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Strong track record · 244 flights
Find Frontier 2015 fares Opens this date on Aviasales
#8 · Southwest 3819
8:30 AM → 9:35 AM2h 05m nonstop
Local times, typical schedule. Last flown 2026-04-01.
86%
chance on time
On time (history)
88%
Cancelled
0.0%
Avg arrival delay
6 min
- Arrived on time 88% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 65%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 3819 fares Opens this date on Aviasales
#9 · United 2495
9:40 AM → 10:48 AM2h 08m nonstop
Local times, typical schedule. Last flown 2026-05-20. Same departure also flew as United 1767, 2048; its record covers all of them.
85%
chance on time
On time (history)
88%
Cancelled
0.0%
Avg arrival delay
10 min
- Arrived on time 88% of the time (66 flights, Jun 2025 to May 2026).
- Never cancelled in 66 scheduled flights.
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
Moderate track record · 66 flights
Find United 2495 fares Opens this date on Aviasales
#10 · United 493
1:25 PM → 2:34 PM2h 09m nonstop
Local times, typical schedule. Last flown 2026-05-20.
83%
chance on time
On time (history)
88%
Cancelled
1.0%
Avg arrival delay
8 min
- Arrived on time 88% of the time (202 flights, Jun 2025 to May 2026).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
Strong track record · 202 flights
Find United 493 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

United Airlines78%
2,458 flights · 78% on time as flown · 0.4% cancel
Frontier Airlines75%
1,483 flights · 76% on time as flown · 0.9% cancel
Southwest Airlines72%
3,125 flights · 73% on time as flown · 0.8% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

Before 9 AM93%
1,331 flights · avg delay 4 min
9 AM to noon81%
1,394 flights · avg delay 12 min
Noon to 3 PM74%
1,108 flights · avg delay 16 min
3 to 6 PM68%
1,302 flights · avg delay 23 min
6 to 9 PM65%
1,369 flights · avg delay 25 min
After 9 PM66%
562 flights · avg delay 22 min

Best day: Wednesday (80%). Worst: Friday (69%).

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

What delays this route

Late-arriving aircraft49%
Airline (crew, maintenance, boarding)27%
Air traffic control and airport volume21%
Severe weather2%

Share of delay minutes by the cause airlines report to the US DOT.

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure

DEN to LAS questions

What time of day is best to fly DEN to LAS?: Before 9 AM: 93% of flights arrived on time, against 65% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
Which airline is most on time from DEN to LAS?: United, with a season-adjusted 78% chance of operating and arriving on time over 2,458 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on DEN to LAS?: July (63% on time); the best was November (83%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?: No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

More routes from DEN

Live status: FAA delays and ground stops

All Products

Aviation Intelligence

Alerts & Airspace

Free Pilot Tools & Widgets

RC Aviation

Games & Learning

Weather Research & More

Pilot Resources

My Airports

Ask ATIS