Carrier performance at one airport

F9→LAS

Frontier Airlines at Harry Reid International

Departures: 12,015
Period: June 2025 to May 2026
Routes: 25
Rank here: #9 of 11

Frontier Airlines at Las Vegas lands a B, level with the national rate of 77.4%. Roughly one flight in four arrive 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 12,015 flights, of which Delta Air Lines flew 15,922 at 85.0% on time.

Measured against the airport rather than the country, Frontier Airlines runs half a point behind the 78.2% weighted average across all carriers at LAS. That is the comparison worth making: every operator here works the same runways, the same airspace and the same weather.

On time

77.5%

11,851 completed departures

Avg delay

76 min

Across delayed flights only

Cancelled

1.29%

At LAS, this carrier only

Rank here

Of 11 carriers clearing the floor at LAS

These figures cover 12,000 flights between June 2025 and May 2026. Beyond the headline rate, 8.7% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Against the competition

Every carrier at LAS, ranked

The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 85.0% of the time; Hawaiian Airlines manages 67.9%. Sample sizes sit next to every figure, because a two-point gap across 976 flights means less than a ten-point one.

On-time performance of all carriers departing LAS
Airline	Flights	On time	Avg delay	Cancelled	Grade
Delta Air Lines	15,922	85.0%	77 min	1.06%	A
Allegiant Air	7,221	83.8%	73 min	0.43%	B+
Spirit Airlines	10,027	81.9%	71 min	1.34%	B
American Airlines	14,112	81.2%	98 min	1.82%	B
United Airlines	15,192	81.1%	67 min	0.68%	B+
SkyWest Airlines	4,083	79.9%	70 min	0.96%	B+
Alaska Airlines	6,643	79.3%	59 min	1.05%	B
JetBlue Airways	3,865	78.1%	80 min	1.89%	B
Frontier Airlines (this page)	12,015	77.5%	76 min	1.29%	B
Southwest Airlines	86,362	75.1%	50 min	0.58%	B+
Hawaiian Airlines	976	67.9%	77 min	0.51%	C+

The spread between Delta and Hawaiian is 17 points, wide enough that it should decide the booking. On a hundred trips that is 17 more arrivals inside the on-time window.

Route by route

Where Frontier Airlines flies from LAS

Frontier Airlines operates 25 routes out of LAS with enough volume to report. Route records inside one carrier at one airport still spread widely, because a short shuttle and a transcontinental have very different exposure to a late inbound.

Frontier Airlines routes from LAS
Route	Flights	On time	Avg delay	Cancelled	Grade
LAS to DEN · Denver	1,480	78.6%	87 min	0.88%	B+
LAS to PHX · Phoenix	874	78.8%	101 min	1.26%	B
LAS to SFO · San Francisco	866	65.8%	68 min	1.39%	C
LAS to DFW · Dallas-Fort Worth	785	81.4%	80 min	2.29%	B
LAS to ONT · Ontario	720	81.5%	84 min	0.97%	B+
LAS to CLE · Cleveland	601	77.9%	75 min	1.16%	B
LAS to LAX · Los Angeles	575	79.8%	54 min	0.17%	B+
LAS to ATL · Atlanta	543	73.2%	72 min	2.58%	C
LAS to SLC · Salt Lake City	502	89.2%	75 min	1.59%	A
LAS to MCO · Orlando	449	71.9%	85 min	0.67%	C+
LAS to SAN · San Diego	403	66.2%	97 min	1.74%	C
LAS to IAH · Houstonthin sample	291	78.9%	59 min	0.69%	B+
LAS to AUS · Austinthin sample	289	83.0%	60 min	1.73%	B
LAS to STL · St. Louisthin sample	283	88.5%	74 min	1.06%	A
LAS to SAT · San Antoniothin sample	258	86.8%	56 min	0.39%	A+
LAS to ELP · El Pasothin sample	249	81.9%	95 min	0.00%	B+
LAS to RNO · Renothin sample	239	76.7%	98 min	1.26%	B
LAS to SEA · Seattlethin sample	237	79.8%	55 min	1.27%	B
LAS to JFK · New Yorkthin sample	232	79.9%	56 min	1.29%	B
LAS to SNA · Santa Anathin sample	212	80.9%	62 min	1.42%	B
LAS to CVG · Cincinnatithin sample	210	74.9%	70 min	1.43%	C
LAS to SMF · Sacramentothin sample	198	74.0%	71 min	3.03%	C−
LAS to SJC · San Josethin sample	179	77.3%	70 min	1.68%	B
LAS to ORD · Chicagothin sample	172	67.5%	87 min	4.65%	C−
LAS to PDX · Portlandthin sample	168	75.9%	53 min	1.19%	B

Departure window

Best time of day for this operation

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 18 points, against 17 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am1,510 flights90.0%
8am–11am2,211 flights81.1%
11am–2pm1,489 flights78.8%
2pm–5pm1,983 flights72.8%
5pm–8pm1,745 flights71.6%
8pm–5am3,077 flights74.4%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 90.0% of the time, against 71.6% for the evening window. That is 18 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on.

Across the year

Seasonal pattern

Darker means more delays. Figures are on-time percentages.February best, June worst

June is the worst month at 67.7% on time, 19 points below February, the best at 86.3%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck.

Delay causes

What holds this operation up

Late-arriving aircraft
50%
Carrier
29%
National Airspace System
20%
Extreme weather
2%

50% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 202,000 reported delay minutes here, that single category outweighs weather by 25 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit.

Cancellations sit at 1.29% against a national 1.80%, which is ordinary. Diversions add another 0.07%.

8.7% of arrivals land an hour or more late, close to the national 8.2%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route are the a little over an hour kind, which a normal layover absorbs.

12,015 flights sit behind these numbers, which is a large enough sample that the headline rate is not moving on noise. Where a sub-group falls below 30 flights the site shows a dash instead of a percentage.

Put together: the calendar is the biggest lever here, not the carrier or the hour. February runs 86.3% on time and June 67.7%, a swing of 19 points. If the dates move at all, move them out of June before you think about anything else.

Common questions

Frontier Airlines at LAS

How often is Frontier Airlines at LAS delayed?

Roughly one flight in four arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 22.5% of the 12,015 flights in this analysis, against 22.6% nationally. Delayed flights are late by a little over an hour on average.

Which airline is most reliable on Frontier Airlines at LAS?

Delta Air Lines leads at 85.0% on time across 15,922 flights. Hawaiian Airlines is at the other end on 67.9%, a gap of 17 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.

What time of day has the fewest delays on Frontier Airlines at LAS?

The 5am–8am departure window is the strongest at 90.0% on time. The 5pm–8pm window is the weakest at 71.6%, 18 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.

How bad are June delays on Frontier Airlines at LAS?

June is the weakest month at 67.7% on time, compared with 86.3% in February. Across the year that is 19 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, June 2025 to May 2026. Updated monthly. How this data is collected.

Key figures