ATL → LAS Flight Reliability

Right now

Origin · ATLNo disruption reported

Aviation weather is not currently a factor.

Updated 07:52 UTC

Atlanta airport profile →

Destination · LASNo disruption reported

Aviation weather is not currently a factor.

Updated 07:56 UTC

Las Vegas airport profile →

Route reliability

July 2023 – July 2026

Route Reliability Score

62/ 100Good

Better than 41% of comparable major US routes (4,598 compared)

Calculated from 15,322 flights. How this is calculated

On-time arrivals

74.7%

11,326 of 15,152

Cancellation rate

0.93%

143 cancelled

Median arrival delay

-3 min

Average 8.7 min

Severe delays

7.9%

60+ minutes late

Delay when late

60 min

Average, when 15+ min late

Flights analyzed

15,322

4 carriers

ATL → LAS arrives on time 74.7% of the time; the return trip, LAS → ATL, arrives on time 82.4% of the time, a 7.7-point gap between the two directions of the same city pair.

ATL → LAS spends 25.4 minutes on the ground on a 1,747-mile trip: 16.9 minutes from pushback to wheels-up at ATL and 8.5 minutes from touchdown to gate at LAS.

Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026

What stands out

This route has stayed remarkably steady year over year, a smaller swing than 93% of 5,368 comparable routes.

75.8% on time over the most recent 12 months (2025-08 to 2026-07), against 76.2% in the 12 months before (2024-08 to 2025-07), virtually unchanged.

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Ranked against every other route with the same kind of figure and at least 5,368 in the comparison.

Why ATL → LAS flights are cancelled

July 2023 – July 2026

ATL → LAS cancelled 143 of 15,322 scheduled flights — about 1 in every 107. The reason filed most often was the airline, 51.7% of the cancellations coded on this route — about 1 in every 207 scheduled flights.

Share of cancellations

Airline51.7%

Weather46.2%

Air traffic2.1%

Security0.0%

Of 143 cancelled departures carrying a reason code.

What each reason means

The airline1 in 207

Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.

74 cancellations, 51.7% of the total.

Extreme weather1 in 232

Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.

66 cancellations, 46.2% of the total.

The air traffic system1 in 5,107

Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.

3 cancellations, 2.1% of the total.

Security—

A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.

0 cancellations, 0.0% of the total.

Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.

143 coded cancellations were recorded on ATL → LAS; the section appears from 50.

When it goes wrong

July 2023 – July 2026

One arrival in ten is worse than

49 min late

against a median of 3 min early

Arrived an hour or more late7.9%

Typical delay when late60 min

Cancelled0.93%

Landed somewhere else0.18%

Percentiles over 15,322 operations; cancelled and diverted flights are counted separately.

Will your connection be tight enough?

Layovers at LAS after arriving from ATL.

Connection buffer and chance of missing by layover length, ATL → LAS arrivals
Connection time	Chance of missing	Reads as
30 min	43%	Likely to miss
45 min	24%	High risk
60 min	15%	High risk
90 min	7.8%	Some risk
120 min	4.4%	Low risk

This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 0.93% of the time and diverts 0.18% of the time, which a late arrival never shows up in.

Chance of missing is the share of 15,152 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.

The worst tenth of arrivals on this route land at least 49 minutes late (90th-percentile gate arrival delay), over 15,322 operations.

Any other layover length: connection checker.

Best time to fly

ATL → LAS flights departing 5–9 AM arrived on time 85.7% of the time, against 62.0% for 9 PM–5 AM departures, a gap of 23.7 percentage points.

By day and hour

On-time arrival rate for each weekday and scheduled departure hour, in local time at the departure airport (ATL).

Hour of departure matters more than day of the week: hourly averages sit a typical 9.0 points from the route-wide rate, weekday averages 3.6 points.

On-time arrival rate for ATL to LAS by weekday and scheduled departure hour, local time. Each button reads out one slot.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
6 AM–7 AM
7 AM–8 AM
8 AM–9 AM
9 AM–10 AM
10 AM–11 AM
11 AM–12 PM
12 PM–1 PM
1 PM–2 PM
2 PM–3 PM
3 PM–4 PM
4 PM–5 PM
5 PM–6 PM
6 PM–7 PM
7 PM–8 PM
8 PM–9 PM
9 PM–10 PM
10 PM–11 PM

On-time rate, % · stronger color, fewer on time

50–59
60–69
70–79
80–89
90–99

Fewer than 120 flights, not scored

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · On time is arrival within 15 minutes of schedule. Cells round to whole percentages; the table shows one decimal.

No slot is named best or worst: too few reach 500 flights. Departures before 6 AM and after 11 PM (176 flights) are not drawn: no slot in those hours has enough flights to score.

View as tableHide table

On-time arrival rate (%) with flights beneath, by scheduled departure hour and weekday for ATL to LAS. A dash means fewer than 120 flights, which are not scored.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
6 AM–7 AM	91.7% on time133 flights	86 flights, too few to score	90 flights, too few to score	92.7% on time123 flights	91.2% on time136 flights	99 flights, too few to score	113 flights, too few to score
7 AM–8 AM	83.6% on time178 flights	82.9% on time176 flights	89.0% on time163 flights	86.7% on time167 flights	86.3% on time164 flights	85.8% on time138 flights	87.5% on time146 flights
8 AM–9 AM	78.5% on time178 flights	83.4% on time190 flights	88.0% on time193 flights	83.1% on time179 flights	84.7% on time191 flights	84.1% on time196 flights	79.8% on time196 flights
9 AM–10 AM	105 flights, too few to score	82.5% on time137 flights	84.7% on time132 flights	103 flights, too few to score	99 flights, too few to score	89 flights, too few to score	99 flights, too few to score
10 AM–11 AM	110 flights, too few to score	77.6% on time125 flights	84.9% on time120 flights	85.0% on time133 flights	111 flights, too few to score	77.8% on time128 flights	73.6% on time123 flights
11 AM–12 PM	77.7% on time131 flights	80.3% on time127 flights	79.0% on time139 flights	81.3% on time139 flights	79.1% on time129 flights	72.1% on time122 flights	77.6% on time146 flights
12 PM–1 PM	88 flights, too few to score	83 flights, too few to score	83 flights, too few to score	86 flights, too few to score	88 flights, too few to score	95 flights, too few to score	88 flights, too few to score
1 PM–2 PM	64 flights, too few to score	72 flights, too few to score	69 flights, too few to score	61 flights, too few to score	59 flights, too few to score	70 flights, too few to score	71 flights, too few to score
2 PM–3 PM	80 flights, too few to score	68 flights, too few to score	71 flights, too few to score	76 flights, too few to score	80 flights, too few to score	80 flights, too few to score	76 flights, too few to score
3 PM–4 PM	98 flights, too few to score	98 flights, too few to score	99 flights, too few to score	96 flights, too few to score	104 flights, too few to score	76.7% on time134 flights	94 flights, too few to score
4 PM–5 PM	88 flights, too few to score	112 flights, too few to score	76.2% on time122 flights	84 flights, too few to score	86 flights, too few to score	78.8% on time121 flights	86 flights, too few to score
5 PM–6 PM	109 flights, too few to score	73.9% on time139 flights	75.7% on time140 flights	107 flights, too few to score	103 flights, too few to score	117 flights, too few to score	105 flights, too few to score
6 PM–7 PM	66.7% on time136 flights	77.2% on time123 flights	117 flights, too few to score	63.4% on time135 flights	60.6% on time130 flights	79.7% on time129 flights	119 flights, too few to score
7 PM–8 PM	64.3% on time240 flights	73.2% on time198 flights	72.1% on time206 flights	57.8% on time254 flights	58.4% on time244 flights	72.4% on time175 flights	65.3% on time257 flights
8 PM–9 PM	64.1% on time157 flights	90 flights, too few to score	86 flights, too few to score	57.0% on time146 flights	59.6% on time149 flights	114 flights, too few to score	59.6% on time159 flights
9 PM–10 PM	64.3% on time222 flights	71.2% on time171 flights	69.0% on time175 flights	56.2% on time225 flights	59.8% on time218 flights	63.0% on time177 flights	49.8% on time222 flights
10 PM–11 PM	53.7% on time123 flights	63 flights, too few to score	72 flights, too few to score	110 flights, too few to score	67.4% on time144 flights	101 flights, too few to score	59.0% on time127 flights

By departure window

5–9 AM85.7%

9 AM–12 PM80.3%

12–3 PM80.0%

3–6 PM73.3%

6–9 PM66.7%

9 PM–5 AM62.0%

By departure hour

12 AM

3 AM

6 AM

9 AM

12 PM

3 PM

6 PM

9 PM

Why ATL → LAS runs late

July 2023 – July 2026

The airline40.8%

crew, maintenance, boarding and fueling, all within the carrier’s control

Late-arriving aircraft31.0%

the inbound aircraft was late, so this flight started late

Air traffic control23.2%

airspace and airport capacity, including weather-driven flow control

Weather4.7%

weather severe enough to stop this flight specifically

Security0.3%

screening or terminal security incidents

Share of the delay minutes US DOT attributed to each cause for ATL → LAS. Only delays of 15 minutes or more are attributed.

How this route holds up in bad weather

July 2023 – July 2026

Bad weather raises cancellations by a similar amount at both ends of ATL to LAS: 3.3 times the normal rate at ATL and 2.4 times at LAS. Cancelled in bad weather against normal hours: ATL 3.4% against 1.0%, LAS 2.0% against 0.8%. Flights that did leave LAS in bad weather arrived on time 58.5% of the time, against 78.5% in normal hours.

Bad weather and normal hours at the airports

Scheduled departures, July 2023 – July 2026

Departures from ATL and LAS in hours of bad weather and in normal hours
Departures from	ATL	LAS
Cancelled in bad weather	3.4%	2.0%
Cancelled in normal hours	1.0%	0.8%
Arrived on time, bad weather	66.5%	58.5%
Arrived on time, normal hours	80.2%	78.5%
Departures in bad weather	105,854	14,522

Of the carriers on this route, Southwest Airlines (2.1% cancelled against 3.1% for the other carriers at ATL) cancelled the fewest departures from ATL in bad weather and Frontier Airlines (5.0% cancelled against 3.8% for the other carriers at ATL) the most.

This route’s airlines in bad weather at ATL

All departures from ATL

Cancellation rates in bad weather at ATL for the airlines that fly ATL to LAS, against the other carriers at ATL in the same months
Airline	Bad-weather departures	Cancelled	Other carriers
Southwest Airlines	8,953	2.1%below the others	3.1%
Delta Air Lines	73,919	3.5%about level	3.6%
Spirit Airlines	2,965	3.9%above the others	3.2%
Frontier Airlines	4,928	5.0%above the others	3.8%

These are airport figures, not route figures: every scheduled departure from ATL and LAS, to any destination, in hours the weather report called bad. The airline rows count each carrier’s departures from ATL on every route.

Weather source and limits. In full: ATL (airlines), LAS, What Weather Costs Each Airport, Who Cancels More When the Weather Turns, Airports That Change Places When Weather Turns.

Airlines on this route

Carriers with at least 200 flights, by the airline that operated each one.

Airlines on this route
Carrier	Flights	On time	Cancelled	Median delay	Severe
Delta Air Lines	10,244	77.6%	0.76%	-3 min	6.3%
Southwest Airlines	2,185	76.7%	0.27%	-4 min	6.2%
Frontier Airlines	1,516	64.1%	2.31%	0 min	15.5%
Spirit Airlines	1,377	61.9%	1.74%	4 min	14.4%

Delta Air Lines flew 66.9% of the 15,322 flights listed. Frontier Airlines cancelled 2.31% of its flights here against 0.27% for Southwest Airlines.

Delta Air Lines arrived on time 15.7 percentage points more often than Spirit Airlines on this route.

Flights on this route

Flight numbers with at least 600 operations here and still on the schedule.

Flights on this route
Flight	Scheduled	Operations	On time
DL777 Delta Air Lines	8:30 AM	1,103	82.6%
DL659 Delta Air Lines	3:50 PM	1,037	77.3%
DL711 Delta Air Lines	5:40 PM	1,006	73.9%
DL466 Delta Air Lines	11:00 AM	966	80.0%
DL945 Delta Air Lines	10:05 AM	789	83.4%
DL825 Delta Air Lines	9:20 PM	771	72.6%

DL945 (10:05 AM) arrived on time 83.4% of the time, 10.8 points more often than DL825 (9:20 PM) at 72.6%.

Weekly and seasonal patterns

By day of week

Mon72.9%

Tue78.5%

Wed80.7%

Thu71.8%

Fri71.7%

Sat77.3%

Sun71.2%

Wednesday is historically the most reliable day and Sunday the least, a gap of 9.5 percentage points.

By month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

July is historically the weakest month and December the strongest, a spread of 19.9 percentage points.

Reliability over time

July 2023 – July 2026

24

25

26

Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 75.8% against 76.2% in the 12 months before — broadly unchanged.

Data and methodology

Calculated by FlyerIntel from 15,322 ATL → LAS flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.

Full methodology · Data sources · Report a problem

Analysis last recomputed September 26, 2026

ATL airport LAS airport Return direction LAS → ATL

ATL→LAS

Right now

Route reliability

What stands out

Why ATL → LAS flights are cancelled

Share of cancellations

What each reason means

When it goes wrong

Will your connection be tight enough?

Best time to fly

By day and hour

By departure window

By departure hour

Why ATL → LAS runs late

How this route holds up in bad weather

Bad weather and normal hours at the airports

This route’s airlines in bad weather at ATL

Airlines on this route

Flights on this route

Weekly and seasonal patterns

By day of week

By month

Reliability over time

Data and methodology