Route profile
PHL→AUS
Flight reliability, delays and best times to fly from Philadelphia to Austin, 1,430 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 27% of comparable major US routes (4,598 compared)
Calculated from 3,222 flights. How this is calculated
PHL → AUS arrives on time 76.4% of the time; the return trip, AUS → PHL, arrives on time 75.8% of the time.
PHL → AUS spends 31.4 minutes on the ground on a 1,430-mile trip: 22.9 minutes from pushback to wheels-up at PHL and 8.6 minutes from touchdown to gate at AUS.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What sets this route apart
Where PHL to AUS differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
PHL to AUS struggles most at 9 AM: 78.7% of its flights scheduled then arrive on time, 4.5 points behind the 83.2% on routes of similar length at the same hour. Against all other routes the gap is 5.6 points.
Sunday is the day PHL to AUS slips furthest against routes of similar length, 70.5% on time where they average 75.4%, 4.9 points lower. Against all other routes the gap is 4.3 points.
In September, PHL to AUS runs 9.4 points below routes of similar length, 73.1% on time to 82.5%. Against all other routes the gap is 9.3 points.
PHL to AUS against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 9 AM departures | 78.7% | routes of similar length | 83.2% | −4.5 pts | 602 here, 93,218 there |
| Weekday: Sunday | 70.5% | routes of similar length | 75.4% | −4.9 pts | 491 here, 231,739 there |
| Month: September | 73.1% | routes of similar length | 82.5% | −9.4 pts | 275 here, 123,694 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 1,430 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.
Why PHL → AUS flights are cancelled
July 2023 – July 2026
PHL → AUS cancelled 55 of 3,222 scheduled flights — about 1 in every 59. The reason filed most often was extreme weather, 81.8% of the cancellations coded on this route — about 1 in every 72 scheduled flights.
Share of cancellations
Of 55 cancelled departures carrying a reason code.
What each reason means
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
45 cancellations, 81.8% of the total.
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
8 cancellations, 14.5% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
2 cancellations, 3.6% of the total.
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. With only one or two carriers on the route, the split mostly reflects how they file. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.
55 coded cancellations were recorded on PHL → AUS; the section appears from 50.
When it goes wrong
July 2023 – July 2026
57 min late
against a median of 9 min early
PHL → AUS has an average that understates its risk: a typical arrival is 9 min early, but the worst tenth are 66 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 3,222 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at AUS after arriving from PHL.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 37% | Likely to miss |
| 45 min | 23% | High risk |
| 60 min | 16% | High risk |
| 90 min | 9.4% | Some risk |
| 120 min | 5.9% | Some 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 1.71% of the time and diverts 0.47% of the time, which a late arrival never shows up in.
Chance of missing is the share of 3,152 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 57 minutes late (90th-percentile gate arrival delay), over 3,222 operations.
Any other layover length: connection checker.
Best time to fly
PHL → AUS flights departing 5–9 AM arrived on time 84.5% of the time, against 68.2% for 6–9 PM departures, a gap of 16.3 percentage points.
By departure window
By departure hour
- 12 AM to 7 AM: too few flights to score
- 8 AM: 82.8% on time from 344 flights
- 9 AM: 78.7% on time from 617 flights
- 10 AM: 84.0% on time from 357 flights
- 11 AM: 79.8% on time from 370 flights
- 12 PM: 75.2% on time from 131 flights
- 1 PM to 2 PM: too few flights to score
- 3 PM: 69.7% on time from 125 flights
- 4 PM to 5 PM: too few flights to score
- 6 PM: 69.7% on time from 435 flights
- 7 PM: 67.8% on time from 455 flights
- 8 PM to 11 PM: too few flights to score
Departure windows with fewer than 120 flights are not scored.
Why PHL → AUS runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
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 PHL → AUS. Only delays of 15 minutes or more are attributed.
Late-arriving aircraft is the largest cause on PHL → AUS, at 45.5%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 84.5% of the time and 6–9 PM departures 68.2%.
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 |
|---|---|---|---|---|---|
| American Airlines | 3,041 | 76.1% | 1.74% | -8 min | 9.7% |
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
| Flight | Scheduled | Operations | On time |
|---|---|---|---|
| AA1314 American Airlines | 7:40 PM | 612 | 69.3% |
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Sunday the least, a gap of 10.6 percentage points.
By month
- Jan: 74.3%
- Feb: 82.4%
- Mar: 77.5%
- Apr: 79.9%
- May: 76.3%
- Jun: 75.2%
- Jul: 68.4%
- Aug: 75.9%
- Sep: 73.1%
- Oct: 80.1%
- Nov: 79.9%
- Dec: 77.6%
July is historically the weakest month and February the strongest, a spread of 14.0 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: too few flights to score (62)
- August 2023: too few flights to score (79)
- September 2023: too few flights to score (90)
- October 2023: too few flights to score (89)
- November 2023: too few flights to score (81)
- December 2023: too few flights to score (83)
- January 2024: too few flights to score (77)
- February 2024: too few flights to score (75)
- March 2024: too few flights to score (86)
- April 2024: too few flights to score (86)
- May 2024: too few flights to score (87)
- June 2024: too few flights to score (89)
- July 2024: too few flights to score (92)
- August 2024: too few flights to score (80)
- September 2024: too few flights to score (76)
- October 2024: too few flights to score (85)
- November 2024: too few flights to score (77)
- December 2024: too few flights to score (77)
- January 2025: too few flights to score (57)
- February 2025: too few flights to score (52)
- March 2025: too few flights to score (57)
- April 2025: too few flights to score (79)
- May 2025: too few flights to score (95)
- June 2025: 69.8% from 120 flights
- July 2025: 81.5% from 127 flights
- August 2025: too few flights to score (118)
- September 2025: too few flights to score (112)
- October 2025: 73.8% from 122 flights
- November 2025: 73.6% from 121 flights
- December 2025: too few flights to score (87)
- January 2026: too few flights to score (62)
- February 2026: too few flights to score (68)
- March 2026: too few flights to score (89)
- April 2026: too few flights to score (78)
- May 2026: too few flights to score (104)
- June 2026: too few flights to score (113)
- July 2026: too few flights to score (90)
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 76.2% against 77.8% in the 12 months before — declining by 1.6 percentage points.
Data and methodology
Calculated by FlyerIntel from 3,222 PHL → AUS 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