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Route · TYS → PHL · 2020–2025 BTS data

Knoxville to Philadelphia

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), TYS to PHL (Knoxville to Philadelphia) ranks #3889 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

85.8%
On-time
+6.8 pts
vs US avg
94 min
Delay when late
1,879
Flights
#3889 of 4927
Corpus placement

Cancelled

1.5%

Best Month

Oct 2023 93%

Worst Month

Aug 2024 75%

Distance

554 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 33 5 1 0 OH
Nov 2025 39 9 0 0 OH
Oct 2025 31 6 0 0 OH
Sep 2025 30 1 0 0 OH
Aug 2025 31 5 2 0 OH
Jul 2025 30 5 3 0 OH
Jun 2025 30 5 1 0 OH
May 2025 31 6 0 0 OH
Apr 2025 31 5 0 0 OH
Mar 2025 30 4 0 0 OH
Jan 2025 31 0 2 0 OH
Nov 2024 40 5 0 0 OH
Oct 2024 102 15 0 1 OH
Sep 2024 36 8 0 0 OH
Aug 2024 59 15 2 1 F9,OH
Jul 2024 40 11 0 0 F9,OH
Jun 2024 44 0 0 0 F9,OH
May 2024 38 7 0 0 F9,OH
Apr 2024 30 8 0 0 OH
Mar 2024 35 3 0 0 OH,YX
Jan 2024 31 5 3 0 OH
Dec 2023 42 2 0 0 OH
Nov 2023 30 0 0 0 OH
Oct 2023 57 4 0 0 OH,YX

TYS–PHL seasonal on-time pattern

Best: June (94.8%) · weakest: February (72.7%)

70%75%80%85%90%95%100% JanFebMarAprMayJunJulAugSepOctNovDec 88.3%

Strongest calendar month

June

94.8% on-time · ~34 flights/mo

Busiest calendar month

February

~55 flights/mo avg

Weakest calendar month

February

72.7% on-time · ~55 flights/mo

Cancellation Rate

1.5%

14 of 931 flights

Diversion Rate

0.2%

2 of 931 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

TYS - Knoxville

Full on-time, delay-cause, and seasonal performance for Knoxville, TN.

TYS on-time profile

PHL - Philadelphia

Full on-time, delay-cause, and seasonal performance for Philadelphia, PA.

PHL on-time profile

Compare the two airports

See TYS and PHL side by side on delays, cancellations, and reliability.

Compare TYS vs PHL

Origin-hub reliability standing

Among TYS's stronger departures

TYS → PHL posts a 85.8% on-time rate, landing in the ≥85% band with 6 of 14 BTS-tracked routes leaving Knoxville. The same hub also shows 6 mid-band and 2 challenged departures · fleet-wide on-time rank #976 of 4927 (highest on-time = #1).

What the Data Says About TYS to PHL

Knoxville to Philadelphia (TYS to PHL) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85.8% on-time rate across 1,879 flights, with delays that do happen averaging 94.3 minutes. The corridor runs roughly 554 miles and is served by 3 carriers. Over the most recent 24 months, 14 of 931 flights were cancelled (1.5%) and 2 diverted (0.2%).

The monthly split is wide on this route: Oct 2023 posted the strongest performance at 93% on-time, while Aug 2024 came in at just 75% - a 18-point swing worth factoring into travel timing.

On the multi-year calendar, TYS–PHL peaks in June at 94.8% on-time while February carries the heaviest traffic (~55 flights per month) ; the softest month is February at 72.7%, a 22.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does TYS to PHL rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, TYS to PHL ranks #3889 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from TYS to PHL? ▼
Flights from Knoxville to Philadelphia have a 85.8% on-time rate based on 1,879 flights. The average delay is 94.3 minutes. The best recent month was Oct 2023 with 93% on-time.
What is the cancellation rate for TYS to PHL? ▼
Over the last 24 months, 1.5% of flights on this route were cancelled (14 of 931 flights) and 0.2% were diverted.
How far is the flight from TYS to PHL? ▼
The flight distance from Knoxville (TYS) to Philadelphia (PHL) is approximately 554 miles. This route is served by 3 carriers.
When is the best time to fly from TYS to PHL? ▼
The best recent month for on-time performance was Oct 2023 (93% on-time). The worst was Aug 2024 (75% on-time). Consider booking during months with historically better performance.

Airports on this route

TYS Airport

Knoxville
PHL Airport

Philadelphia
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using TYS–PHL data

TYS–PHL runs 6.8 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare TYS and PHL airport profiles: delay causes and top routes differ even on the same corridor. TYS airport
  • If your dates flex, June (94.8% on-time) beats February (72.7%) on this corridor. Seasonal chart
  • 4 other routes post a similar 85.8% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.