AUS → DEN Flight Reliability

Right now

Origin · AUSNo disruption reported

Aviation weather is not currently a factor.

Updated 07:53 UTC

Austin airport profile →

Destination · DENNo disruption reported

Aviation weather is not currently a factor.

Updated 07:53 UTC

Denver airport profile →

Route reliability

July 2023 – July 2026

Route Reliability Score

72/ 100Good

Better than 66% of comparable major US routes (4,598 compared)

Calculated from 15,176 flights. How this is calculated

On-time arrivals

79.9%

11,999 of 15,019

Cancellation rate

0.78%

119 cancelled

Median arrival delay

-7 min

Average 4.9 min

Severe delays

6.6%

60+ minutes late

Delay when late

63 min

Average, when 15+ min late

Flights analyzed

15,176

4 carriers

AUS → DEN arrives on time 79.9% of the time; the return trip, DEN → AUS, arrives on time 76.2% of the time, a 3.7-point gap between the two directions of the same city pair.

AUS → DEN spends 23.5 minutes on the ground on a 775-mile trip: 14.9 minutes from pushback to wheels-up at AUS and 8.6 minutes from touchdown to gate at DEN.

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

Why AUS → DEN flights are cancelled

July 2023 – July 2026

AUS → DEN cancelled 119 of 15,176 scheduled flights — about 1 in every 128. The reason filed most often was extreme weather, 48.7% of the cancellations coded on this route — about 1 in every 262 scheduled flights.

Share of cancellations

Weather48.7%

Airline40.3%

Air traffic10.9%

Security0.0%

Of 119 cancelled departures carrying a reason code.

What each reason means

Extreme weather1 in 262

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

58 cancellations, 48.7% of the total.

The airline1 in 316

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

48 cancellations, 40.3% of the total.

The air traffic system1 in 1,167

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

13 cancellations, 10.9% 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.

119 coded cancellations were recorded on AUS → DEN; the section appears from 50.

When it goes wrong

July 2023 – July 2026

One arrival in ten is worse than

40 min late

against a median of 7 min early

Arrived an hour or more late6.6%

Typical delay when late63 min

Cancelled0.78%

Landed somewhere else0.25%

Percentiles over 15,176 operations; cancelled and diverted flights are counted separately.

Will your connection be tight enough?

Layovers at DEN after arriving from AUS.

Connection buffer and chance of missing by layover length, AUS → DEN arrivals
Connection time	Chance of missing	Reads as
30 min	35%	Likely to miss
45 min	19%	High risk
60 min	13%	Some risk
90 min	6.5%	Some risk
120 min	3.8%	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 0.78% of the time and diverts 0.25% of the time, which a late arrival never shows up in.

Chance of missing is the share of 15,019 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 40 minutes late (90th-percentile gate arrival delay), over 15,176 operations.

Any other layover length: connection checker.

Best time to fly

AUS → DEN flights departing 5–9 AM arrived on time 90.5% of the time, against 65.6% for 6–9 PM departures, a gap of 24.9 percentage points.

By day and hour

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

Hour of departure matters more than day of the week: hourly averages sit a typical 11.0 points from the route-wide rate, weekday averages 1.9 points.

On-time arrival rate for AUS to DEN by weekday and scheduled departure hour, local time. Each button reads out one slot.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
5 AM–6 AM
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

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 after 9 PM (549 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 AUS to DEN. A dash means fewer than 120 flights, which are not scored.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
5 AM–6 AM	93.1% on time190 flights	93.0% on time131 flights	98.3% on time120 flights	95.6% on time207 flights	91.0% on time190 flights	92.8% on time169 flights	96.3% on time164 flights
6 AM–7 AM	119 flights, too few to score	105 flights, too few to score	107 flights, too few to score	91.7% on time120 flights	91.7% on time121 flights	113 flights, too few to score	93.9% on time133 flights
7 AM–8 AM	93 flights, too few to score	106 flights, too few to score	109 flights, too few to score	90 flights, too few to score	95 flights, too few to score	99 flights, too few to score	104 flights, too few to score
8 AM–9 AM	81.2% on time192 flights	83.0% on time176 flights	86.7% on time175 flights	91.3% on time196 flights	85.1% on time195 flights	92 flights, too few to score	86.0% on time172 flights
9 AM–10 AM	115 flights, too few to score	97 flights, too few to score	93 flights, too few to score	103 flights, too few to score	116 flights, too few to score	108 flights, too few to score	104 flights, too few to score
10 AM–11 AM	85.8% on time156 flights	86.5% on time142 flights	92.2% on time153 flights	82.6% on time164 flights	91.6% on time155 flights	86.0% on time122 flights	90.8% on time121 flights
11 AM–12 PM	91.0% on time190 flights	86.1% on time169 flights	88.8% on time178 flights	88.6% on time185 flights	84.1% on time183 flights	70 flights, too few to score	85.0% on time195 flights
12 PM–1 PM	87.5% on time170 flights	88.3% on time163 flights	92.2% on time168 flights	86.7% on time160 flights	84.2% on time167 flights	93.3% on time195 flights	85.4% on time158 flights
1 PM–2 PM	108 flights, too few to score	82.8% on time123 flights	117 flights, too few to score	116 flights, too few to score	117 flights, too few to score	97 flights, too few to score	81.1% on time133 flights
2 PM–3 PM	77.2% on time129 flights	99 flights, too few to score	115 flights, too few to score	70.2% on time128 flights	65.4% on time136 flights	87 flights, too few to score	80.3% on time140 flights
3 PM–4 PM	106 flights, too few to score	68 flights, too few to score	60 flights, too few to score	112 flights, too few to score	105 flights, too few to score	54 flights, too few to score	77 flights, too few to score
4 PM–5 PM	69.4% on time162 flights	75.2% on time223 flights	67.3% on time209 flights	68.8% on time155 flights	62.7% on time152 flights	74.6% on time130 flights	60.6% on time161 flights
5 PM–6 PM	87 flights, too few to score	68 flights, too few to score	69 flights, too few to score	88 flights, too few to score	98 flights, too few to score	92 flights, too few to score	92 flights, too few to score
6 PM–7 PM	65.2% on time232 flights	73.0% on time191 flights	64.9% on time224 flights	59.4% on time230 flights	61.6% on time231 flights	100 flights, too few to score	56.4% on time223 flights
7 PM–8 PM	87 flights, too few to score	63 flights, too few to score	70 flights, too few to score	95 flights, too few to score	89 flights, too few to score	59 flights, too few to score	66 flights, too few to score
8 PM–9 PM	112 flights, too few to score	58 flights, too few to score	66 flights, too few to score	110 flights, too few to score	104 flights, too few to score	73 flights, too few to score	68.1% on time148 flights

By departure window

5–9 AM90.5%

9 AM–12 PM87.6%

12–3 PM83.0%

3–6 PM67.9%

6–9 PM65.6%

9 PM–5 AM67.8%

By departure hour

12 AM

3 AM

6 AM

9 AM

12 PM

3 PM

6 PM

9 PM

Why AUS → DEN runs late

July 2023 – July 2026

Late-arriving aircraft44.0%

the inbound aircraft was late, so this flight started late

Air traffic control27.0%

airspace and airport capacity, including weather-driven flow control

The airline25.1%

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

Weather3.7%

weather severe enough to stop this flight specifically

Security0.2%

screening or terminal security incidents

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

Late-arriving aircraft is the largest cause on AUS → DEN, at 44.0%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 90.5% of the time and 6–9 PM departures 65.6%.

How this route holds up in bad weather

July 2023 – July 2026

The harder-hit end is DEN, where the flight lands. Its figure counts departures from DEN, so it says more about how that airport copes than about this route. Bad weather cancels 4.0 times the normal rate at DEN against 1.7 times at AUS. Cancelled in bad weather against normal hours: AUS 1.6% against 0.9%, DEN 2.8% against 0.7%. Flights that did leave DEN in bad weather arrived on time 51.5% of the time, against 78.8% in normal hours.

Bad weather and normal hours at the airports

Scheduled departures, July 2023 – July 2026

Departures from AUS and DEN in hours of bad weather and in normal hours
Departures from	AUS	DEN
Cancelled in bad weather	1.6%	2.8%
Cancelled in normal hours	0.9%	0.7%
Arrived on time, bad weather	74.9%	51.5%
Arrived on time, normal hours	77.5%	78.8%
Departures in bad weather	22,580	92,610

Southwest Airlines (1.0% cancelled against 2.0% for the other carriers at AUS) cancelled fewer departures from AUS in bad weather than the other carriers there did in the same months. None of the route’s other carriers was clearly worse. One more carrier flies this route but has too few bad-weather departures from AUS to compare.

This route’s airlines in bad weather at AUS

All departures from AUS

Cancellation rates in bad weather at AUS for the airlines that fly AUS to DEN, against the other carriers at AUS in the same months
Airline	Bad-weather departures	Cancelled	Other carriers
Southwest Airlines	9,022	1.0%below the others	2.0%
United Airlines	2,784	1.4%about level	1.6%
SkyWest Airlines	1,375	2.3%about level	1.8%

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

Weather source and limits. In full: AUS (airlines), DEN, 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
Southwest Airlines	7,605	77.2%	0.67%	-4 min	6.8%
United Airlines	5,711	83.4%	0.93%	-9 min	6.0%
Frontier Airlines	1,307	80.6%	0.92%	-8 min	7.2%
SkyWest Airlines	553	80.0%	0.54%	-11 min	8.4%

Southwest Airlines flew 50.1% of the 15,176 flights listed.

United Airlines arrived on time 6.2 percentage points more often than Southwest 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
UA595 United Airlines	9:00 AM	999	86.3%
UA2447 United Airlines	2:55 PM	915	76.3%
UA779 United Airlines	11:05 AM	771	89.5%
F91815 Frontier Airlines	6:00 AM	738	84.0%

UA779 (11:05 AM) arrived on time 89.5% of the time, 13.2 points more often than UA2447 (2:55 PM) at 76.3%.

Weekly and seasonal patterns

By day of week

Mon79.4%

Tue82.4%

Wed81.1%

Thu78.9%

Fri77.8%

Sat83.1%

Sun77.8%

Saturday is historically the most reliable day and Friday the least, a gap of 5.3 percentage points.

By month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

May is historically the weakest month and November the strongest, a spread of 14.5 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 79.1% against 80.2% in the 12 months before — broadly unchanged.

Data and methodology

Calculated by FlyerIntel from 15,176 AUS → DEN 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

AUS airport DEN airport Return direction DEN → AUS

AUS→DEN

Right now

Route reliability

Why AUS → DEN 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 AUS → DEN 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 AUS

Airlines on this route

Flights on this route

Weekly and seasonal patterns

By day of week

By month

Reliability over time

Data and methodology