Route profile
AUS→SLC
Flight reliability, delays and best times to fly from Austin to Salt Lake City, 1,086 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 76% of comparable major US routes (4,598 compared)
Calculated from 5,406 flights. How this is calculated · What counts as on time
AUS → SLC arrives on time 82.7% of the time; the return trip, SLC → AUS, arrives on time 80.2% of the time, a 2.5-point gap between the two directions of the same city pair.
AUS → SLC spends 22.7 minutes on the ground on a 1,086-mile trip: 15.3 minutes from pushback to wheels-up at AUS and 7.4 minutes from touchdown to gate at SLC.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What stands out
Every day of the week performs about the same on this route, steadier than 95% of 4,467 comparable routes.
84.8% on time on the best day (Tuesday) against 80.7% on the worst (Monday).
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 4,467 in the comparison.
What sets this route apart
Where AUS to SLC differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
AUS to SLC is at its best against routes of similar length for flights scheduled at 6 PM: 78.4% arrive on time, 11.3 points ahead of the 67.1% those routes manage at that hour. Against all other routes the gap is 9.8 points.
AUS to SLC holds up on Sundays better than routes of similar length do: 83.6% on time to their 73.0%, a 10.6 points lead. Against all other routes the gap is 8.8 points.
August is kinder to AUS to SLC than to routes of similar length: 87.4% on time against 74.2%, 13.2 points better. Against all other routes the gap is 10.9 points.
Delta Air Lines does better on AUS to SLC than on its routes of similar length: 86.4% on time here, 80.4% there, 6 points apart. Against all other routes the gap is 4.9 points.
AUS to SLC against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 6 PM departures | 78.4% | routes of similar length | 67.1% | +11.3 pts | 631 here, 179,326 there |
| Weekday: Sunday | 83.6% | routes of similar length | 73.0% | +10.6 pts | 764 here, 422,464 there |
| Month: August | 87.4% | routes of similar length | 74.2% | +13.2 pts | 445 here, 227,916 there |
| Airline: Delta Air Lines | 86.4% | routes of similar length | 80.4% | +6.0 pts | 3,548 here, 471,205 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 1,086 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
When it goes wrong
July 2023 – July 2026
33 min late
against a median of 7 min early
Percentiles over 5,406 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at SLC after arriving from AUS.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 32% | Likely to miss |
| 45 min | 17% | High risk |
| 60 min | 11% | Some risk |
| 90 min | 5.9% | 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 0.57% of the time and diverts 0.17% of the time, which a late arrival never shows up in.
Chance of missing is the share of 5,366 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 33 minutes late (90th-percentile gate arrival delay), over 5,406 operations.
Any other layover length: connection checker.
Best time to fly
AUS → SLC flights departing 5–9 AM arrived on time 92.2% of the time, against 71.9% for 3–6 PM departures, a gap of 20.3 percentage points.
By departure window
By departure hour
- 12 AM to 4 AM: too few flights to score
- 5 AM: 90.1% on time from 417 flights
- 6 AM: too few flights to score
- 7 AM: 91.1% on time from 194 flights
- 8 AM: 93.5% on time from 995 flights
- 9 AM to 10 AM: too few flights to score
- 11 AM: 86.6% on time from 216 flights
- 12 PM: 84.9% on time from 1,057 flights
- 1 PM: 83.1% on time from 174 flights
- 2 PM: 75.6% on time from 342 flights
- 3 PM: 73.4% on time from 124 flights
- 4 PM: 72.9% on time from 263 flights
- 5 PM: 69.6% on time from 192 flights
- 6 PM: 78.4% on time from 637 flights
- 7 PM: 67.4% on time from 447 flights
- 8 PM to 11 PM: too few flights to score
Departure windows with fewer than 120 flights are not scored.
Why AUS → SLC runs late
July 2023 – July 2026
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for AUS → SLC. Only delays of 15 minutes or more are attributed. What the five causes mean
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| Delta Air Lines | 3,577 | 86.4% | 0.70% | -11 min | 5.5% |
| Southwest Airlines | 1,456 | 73.0% | 0.21% | 0 min | 6.8% |
| SkyWest Airlines | 373 | 84.8% | 0.80% | -4 min | 5.7% |
Delta Air Lines flew 66.2% of the 5,406 flights listed.
Delta Air Lines arrived on time 13.4 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.
| Flight | Scheduled | Operations | On time |
|---|---|---|---|
| DL2618 Delta Air Lines | 8:15 AM | 785 | 94.0% |
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Monday the least, a gap of 4.1 percentage points.
By month
- Jan: 80.8%
- Feb: 87.2%
- Mar: 83.0%
- Apr: 84.6%
- May: 76.0%
- Jun: 75.7%
- Jul: 76.2%
- Aug: 87.4%
- Sep: 88.4%
- Oct: 86.6%
- Nov: 86.8%
- Dec: 83.4%
June is historically the weakest month and September the strongest, a spread of 12.7 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 79.7% from 150 flights
- August 2023: 87.5% from 155 flights
- September 2023: 83.9% from 144 flights
- October 2023: 89.0% from 146 flights
- November 2023: 89.4% from 132 flights
- December 2023: 90.2% from 132 flights
- January 2024: 76.7% from 136 flights
- February 2024: 91.4% from 128 flights
- March 2024: 82.9% from 129 flights
- April 2024: 84.0% from 131 flights
- May 2024: 72.8% from 152 flights
- June 2024: 78.5% from 164 flights
- July 2024: 74.8% from 166 flights
- August 2024: 88.7% from 152 flights
- September 2024: 90.3% from 145 flights
- October 2024: 89.2% from 157 flights
- November 2024: 85.4% from 144 flights
- December 2024: 75.8% from 149 flights
- January 2025: 91.1% from 127 flights
- February 2025: 82.1% from 123 flights
- March 2025: 83.3% from 151 flights
- April 2025: 83.9% from 138 flights
- May 2025: 72.9% from 141 flights
- June 2025: 77.5% from 160 flights
- July 2025: 77.4% from 169 flights
- August 2025: 85.9% from 142 flights
- September 2025: 91.1% from 135 flights
- October 2025: 81.6% from 152 flights
- November 2025: 85.8% from 134 flights
- December 2025: 85.0% from 140 flights
- January 2026: 75.2% from 139 flights
- February 2026: 87.9% from 141 flights
- March 2026: 82.8% from 170 flights
- April 2026: 85.8% from 149 flights
- May 2026: 82.3% from 150 flights
- June 2026: 71.2% from 163 flights
- July 2026: 73.2% from 170 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 82.0% against 83.0% in the 12 months before — broadly unchanged.
Data and methodology
Calculated by FlyerIntel from 5,406 AUS → SLC 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
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed