PlainFlights

Route · ONT → LAS · 2020–2025 BTS data

Ontario to Las Vegas

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), ONT to LAS (Ontario to Las Vegas) ranks #851 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

78.3%
On-time
-0.7 pts
vs US avg
68 min
Delay when late
12,615
Flights
#851 of 4927
Corpus placement

Cancelled

0.9%

Best Month

Dec 2024 88%

Worst Month

Mar 2024 66%

Distance

197 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 206 32 2 0 WN,F9
Nov 2025 216 49 9 0 F9,WN
Oct 2025 228 47 1 0 WN,F9
Sep 2025 201 47 0 0 WN,F9
Aug 2025 203 39 2 0 WN,F9
Jul 2025 216 54 2 0 WN,F9
Jun 2025 211 57 2 1 WN,F9
May 2025 223 52 1 0 WN,F9
Apr 2025 223 50 1 0 F9,WN
Mar 2025 219 46 2 0 WN,F9
Feb 2025 191 24 2 0 WN,F9
Jan 2025 221 45 3 0 WN,F9
Dec 2024 227 27 0 0 F9,WN
Nov 2024 243 34 0 0 WN,F9
Oct 2024 264 58 0 0 WN,F9
Sep 2024 240 58 3 0 WN,F9
Aug 2024 232 54 3 0 F9,WN
Jul 2024 247 52 3 0 F9,WN
Jun 2024 239 56 8 0 F9,WN
May 2024 240 62 1 0 F9,WN
Apr 2024 232 68 0 0 F9,WN
Mar 2024 237 80 0 1 F9,WN
Feb 2024 185 38 1 0 F9,WN
Jan 2024 197 34 1 0 F9,WN

ONT–LAS seasonal on-time pattern

Best: February (83.7%) · weakest: June (73.7%)

70%75%80%85% JanFebMarAprMayJunJulAugSepOctNovDec 81.2%

Strongest calendar month

February

83.7% on-time · ~151 flights/mo

Busiest calendar month

October

~199 flights/mo avg

Weakest calendar month

June

73.7% on-time · ~176 flights/mo

Cancellation Rate

0.9%

47 of 5,341 flights

Diversion Rate

0.0%

2 of 5,341 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

ONT - Ontario

Full on-time, delay-cause, and seasonal performance for Ontario, CA.

ONT on-time profile

LAS - Las Vegas

Full on-time, delay-cause, and seasonal performance for Las Vegas, NV.

LAS on-time profile

Compare the two airports

See ONT and LAS side by side on delays, cancellations, and reliability.

Compare ONT vs LAS

Origin-hub reliability standing

Mid-pack among ONT departures

From ONT, this corridor sits with 9 other 75–85% on-time routes out of 21 tracked departures, not the hub's reliability leaders (10 at ≥85%) and not the softest ( 2 below 75%). Destination: Las Vegas · fleet on-time rank #3756 of 4927.

What the Data Says About ONT to LAS

The Ontario to Las Vegas corridor (ONT to LAS) posts a 78.3% on-time rate on the lower edge of the average band, based on 12,615 tracked flights. Late flights run 68.0 minutes behind on average. 3 carriers cover the 197-mile route; over the last 24 months, 47 of 5,341 flights were cancelled (0.9%) and 0.0% diverted.

The monthly split is wide on this route: Dec 2024 posted the strongest performance at 88% on-time, while Mar 2024 came in at just 66% - a 22-point swing worth factoring into travel timing.

On the multi-year calendar, ONT–LAS peaks in February at 83.7% on-time while October carries the heaviest traffic (~199 flights per month) ; the softest month is June at 73.7%, a 10.0-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does ONT to LAS rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, ONT to LAS ranks #851 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from ONT to LAS? ▼
Flights from Ontario to Las Vegas have a 78.3% on-time rate based on 12,615 flights. The average delay is 68.0 minutes. The best recent month was Dec 2024 with 88% on-time.
What is the cancellation rate for ONT to LAS? ▼
Over the last 24 months, 0.9% of flights on this route were cancelled (47 of 5,341 flights) and 0.0% were diverted.
How far is the flight from ONT to LAS? ▼
The flight distance from Ontario (ONT) to Las Vegas (LAS) is approximately 197 miles. This route is served by 3 carriers.
When is the best time to fly from ONT to LAS? ▼
The best recent month for on-time performance was Dec 2024 (88% on-time). The worst was Mar 2024 (66% on-time). Consider booking during months with historically better performance.

Airports on this route

ONT Airport

Ontario
LAS Airport

Las Vegas
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using ONT–LAS data

ONT–LAS is mid-pack at 78.3% on-time; month and carrier mix move more than the corridor headline.

  • Compare ONT and LAS airport profiles: delay causes and top routes differ even on the same corridor. ONT airport
  • If your dates flex, February (83.7% on-time) beats June (73.7%) on this corridor. Seasonal chart
  • 4 other routes post a similar 78.3% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.