ON TIMEBOARD
DSM Des Moines / LAS Las Vegas

DSM → LAS on time

Des Moines (Des Moines, IA) to Las Vegas Harry Reid (Las Vegas, NV). Every scheduled flight, September 2025 to August 2026.

On time
78%
arrived < 15 min late
Cancelled
0.2%
595 flights
Typical arrival
−6 min
median vs schedule
When late
+89 min
average delay
Flights / day
2
2 airlines

78% of flights from Des Moines to Las Vegas arrived on time over the past 12 months. That is about the typical U.S. route. Most reliable airline: Southwest Airlines (83%). 7% 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 DSM → LAS: when a flight was late, it was under 45 minutes late 54% of the time. About 1 in 14 flights landed an hour or more late, and 1 in 50 three hours or more; 0.2% were cancelled outright.

Share of all 595 scheduled flights, past 12 months, by arrival time against schedule.

By airline

AirlineFlightsOn timeCancelledTypical arrival1h+ lateAvg when lateOperated by
Southwest Airlines36583%0.3%−7 min3.8%+58 minSouthwest Airlines
Allegiant Air23072%0.0%−3 min12.2%+120 minAllegiant Air

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 DSM). Delays build through the day as late planes knock on, so early flights usually do best.

40%70%100%7 a.m. departures: too few flights (20 flights)7a8 a.m. departures: too few flights (30 flights)8a9 a.m. departures: too few flights (2 flights)9a10 a.m. departures: too few flights10a11 a.m. departures: too few flights (71 flights)11anoon departures: 84% on time (236 flights)8412p1 p.m. departures: too few flights (44 flights)1p2 p.m. departures: too few flights (21 flights)2p3 p.m. departures: too few flights (72 flights)3p4 p.m. departures: too few flights (1 flights)4p5 p.m. departures: too few flights5p6 p.m. departures: too few flights (4 flights)6p7 p.m. departures: too few flights (8 flights)7p8 p.m. departures: too few flights (25 flights)8p9 p.m. departures: too few flights (37 flights)9p
DSM → LAS, share of flights arriving on time, by departure hour. Hours with under 100 flights are greyed out.
82%+ on time76–82%68–76%under 68%too few flights

By airline and hour

DepartsSouthwest Airlines
noon84%

By month

Each calendar month pooled over 2023–2026. Best: November (91%). Worst: January (73%).

40%70%100%Jan: 73% on time (146 flights)73JanFeb: 79% on time (135 flights)79FebMar: 78% on time (161 flights)78MarApr: 81% on time (140 flights)81AprMay: 74% on time (147 flights)74MayJun: 83% on time (150 flights)83JunJul: 77% on time (155 flights)77JulAug: 76% on time (149 flights)76AugSep: 83% on time (139 flights)83SepOct: 90% on time (150 flights)90OctNov: 91% on time (141 flights)91NovDec: 78% on time (152 flights)78Dec

By day of week

DayFlightsOn timeCancelled
Monday10676%0.0%
Tuesday53——
Wednesday73——
Thursday10178%0.0%
Friday10476%0.0%
Saturday54——
Sunday10476%1.0%

Why flights were late

Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.

Late inbound plane 37%Airline (crew, maintenance, ops) 29%Air traffic & airport (NAS) 23%Severe weather 11%Security 1%

Cancellations: weather 1

Month by month

Not enough months with data to draw a trend.

Questions

How often are flights from DSM to LAS on time?

78% of 595 scheduled flights from Des Moines, IA to Las Vegas, NV arrived within 15 minutes of schedule between September 2025 and August 2026. 0.2% were cancelled.

Which airline is most on time from DSM to LAS?

Southwest Airlines: 83% of its 365 flights on the route arrived on time. Allegiant Air: 72%.

What month has the most delays from DSM to LAS?

January (73% on time). The best month is November (91%), over 2023–2026.

Related

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.