ON TIMEBOARD

AUS → PHL on time

Austin-Bergstrom (Austin, TX) to Philadelphia (Philadelphia, PA). Every scheduled flight, September 2025 to August 2026.

On time
75%
arrived < 15 min late
Cancelled
2.0%
1,150 flights
Typical arrival
−6 min
median vs schedule
When late
+188 min
average delay
Flights / day
3
2 airlines

75% of flights from Austin to Philadelphia arrived on time over the past 12 months. That is worse than the typical U.S. route. The 7 a.m. departures ran on time 80% of the time; the noon ones 69%. 14% of flights arrived more than an hour late or not at all.

How late?

The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for AUS → PHL: when a flight was late, it was under 45 minutes late 39% of the time. About 1 in 8 flights landed an hour or more late, and 1 in 20 three hours or more; 2.0% were cancelled outright.

Share of all 1,150 scheduled flights, past 12 months, by arrival time against schedule.

By airline

AirlineFlightsOn timeCancelledTypical arrival1h+ lateAvg when lateOperated by
American Airlines1,11374%2.1%−6 min11.9%+192 minAmerican Airlines 99%, Republic Airways 1%
Frontier Airlines37—————Frontier Airlines

Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.

Best time of day to fly

On-time rate by scheduled departure hour (local time at AUS). Delays build through the day as late planes knock on, so early flights usually do best.

40%70%100%5 a.m. departures: too few flights (33 flights)5a6 a.m. departures: too few flights (48 flights)6a7 a.m. departures: 80% on time (261 flights)807a8 a.m. departures: too few flights (2 flights)8a9 a.m. departures: too few flights (23 flights)9a10 a.m. departures: too few flights (36 flights)10a11 a.m. departures: too few flights (44 flights)11anoon departures: 69% on time (226 flights)6912p1 p.m. departures: too few flights (85 flights)1p2 p.m. departures: 70% on time (198 flights)702p3 p.m. departures: too few flights (53 flights)3p4 p.m. departures: too few flights (96 flights)4p5 p.m. departures: too few flights (45 flights)5p
AUS → PHL, share of flights arriving on time, by departure hour. Hours with under 100 flights are greyed out.
82%+ on time76–82%68–76%under 68%too few flights

By airline and hour

DepartsAmerican Airlines
7 a.m.80%
noon70%
2 p.m.71%

Last flight of the day

On AUS → PHL, each airline's last flight of the day was cancelled 2.8% of the time, against 1.7% for its earlier flights (1.6× as often). It arrived 3+ hours late 2.8% of the time (earlier flights: 6.4%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.

AirlineLast departureLast: cancelledLast: 3h+ lateEarlier: cancelledNext morning
American Airlines4:26 p.m.2.8%2.8%1.7%first flight 7:30 a.m.

Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.

If you need to be in PHL tonight, book an earlier flight so there's a backup if it's cancelled.

By month

Each calendar month pooled over 2023–2026. Best: February (82%). Worst: July (65%).

40%70%100%Jan: 74% on time (196 flights)74JanFeb: 82% on time (195 flights)82FebMar: 78% on time (232 flights)78MarApr: 78% on time (243 flights)78AprMay: 73% on time (290 flights)73MayJun: 69% on time (322 flights)69JunJul: 65% on time (307 flights)65JulAug: 68% on time (298 flights)68AugSep: 76% on time (280 flights)76SepOct: 76% on time (296 flights)76OctNov: 79% on time (279 flights)79NovDec: 76% on time (245 flights)76Dec

By day of week

DayFlightsOn timeCancelled
Monday19270%4.7%
Tuesday15182%1.3%
Wednesday15278%1.3%
Thursday18073%1.7%
Friday17476%1.7%
Saturday11381%0.0%
Sunday18866%2.1%

Why flights were late

Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.

Airline (crew, maintenance, ops) 57%Late inbound plane 33%Air traffic & airport (NAS) 6%Severe weather 3%

Cancellations: weather 15 · airline 6 · air traffic/airport 2

Month by month

50%75%100%Sep 2023Jan 2024Jan 2025Jan 2026Jun 2025: 60% on time, 2.5% cancelledJul 2025: 62% on time, 6.3% cancelledAug 2025: 73% on time, 2.6% cancelledSep 2025: 81% on time, 0.0% cancelledOct 2025: 72% on time, 0.0% cancelledNov 2025: 71% on time, 0.0% cancelledMay 2026: 79% on time, 0.9% cancelledJun 2026: 76% on time, 0.0% cancelledAug 2026: 71% on time, 4.0% cancelled
Share of flights on time, by month (hover a point for cancellations)
AUS → PHL, monthly on-time and cancellation rate.

Flight numbers on this route

Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.

FlightDepartsFlightsOn timeCancelledTypical arrivalOperated by
AA 27747:30 a.m.35282%1.7%−9 minAmerican Airlines
AA 94210:00 a.m.16172%1.9%−4 minAmerican Airlines

Worst days in the past year

DateFlightsOn timeCancelled
Aug 10, 202640%0
Sep 24, 202530%0
Feb 23, 202630%3
Dec 14, 202530%0
Oct 12, 2025520%0

Questions

How often are flights from AUS to PHL on time?

75% of 1,150 scheduled flights from Austin, TX to Philadelphia, PA arrived within 15 minutes of schedule between September 2025 and August 2026. 2.0% were cancelled.

What is the best time of day to fly AUS to PHL?

Flights scheduled to leave at 7 a.m. were the most reliable (80% on time). The noon departures were the least (69%).

What month has the most delays from AUS to PHL?

July (65% on time). The best month is February (82%), over 2023–2026.

Is the last flight of the day from AUS to PHL more likely to be cancelled?

Yes. Each airline's last AUS–PHL flight of the day was cancelled 2.8% of the time over the past year, against 1.7% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.

Related

Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.