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926 km · Domestic

Philadelphia (PHL) – Louisville Muhammad Ali (SDF)

In July 2026, 115 flights operated between Philadelphia and Louisville Muhammad Ali (both directions), and 63.5% left on time, according to the US BTS.

Official · July 2026 according to the US BTS only airlines required to report on-time data to the US DOT

Flights per month

Only complete months are shown. A month appears once the source has published every day of it.

The most recent periods15 periods
PeriodFlights operated 2025Flights operated 2026Change vs last year
January–49–
February–83–
March–121–
April–122–
May102141▲ 38.2%
June64123▲ 92.2%
July105115▲ 9.5%
August69––
September131––
October173–in progress
November25––
December35––

On-time departures by month

Departures within 15 minutes of schedule.

The most recent periods15 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January–81.6%–
February–84.3%–
March–80.2%–
April–86.9%–
May77.5%92.2%▲ 19.0%
June73.4%82.1%▲ 11.9%
July84.8%63.5%▼ 25.1%
August82.6%––
September87.8%––
October80.3%–in progress
November68.0%––
December68.6%––

Cancelled flights by month

The most recent periods15 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January–2–
February–7–
March–3–
April–0–
May110.0%
June43▼ 25.0%
July79▲ 28.6%
August3––
September1––
October0–in progress
November0––
December0––

Airlines on this route

  1. Republic Airways 60.8%
  2. PSA Airlines 37.5%
  3. American Airlines 1.7%

Oct 1, 2024 – Jul 31, 2026

By direction

PHL → SDF

Scheduled flights
785
Flights operated
759
Cancelled
26 · 3.3%
On-time departures
80.0%

SDF → PHL

Scheduled flights
784
Flights operated
769
Cancelled
15 · 1.9%
On-time departures
83.5%

PHL → SDF and SDF → PHL counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Republic Airways YX 954 60.8% 86.3% 24
PSA Airlines OH 589 37.5% 74.5% 17
American Airlines AA 26 1.7% 76.9% 0

Shares are of scheduled flights in the period shown. Codeshare flights are counted once, under the operating airline.

Flight timing & delays

Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.

Times are local to the departure airport of each flight; both directions are combined.

US domestic sectors recorded by BTS

Source: the US BTS · Oct 12, 2024 → Jul 31, 2026

Lowest average delay07:00–08:001.7min · 341 recorded · 339 measured
Gap to highest-delay hour18.7min07:00 ↔ 18:00
Recorded flights1,569PHL–SDF

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · Fewer than 200 measured departures · 2 recorded · 2 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 66 recorded · 62 measured · Source: the US BTS 07:00 · 90.3% · 341 recorded · 339 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 60 recorded · 57 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 25 recorded · 25 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 101 recorded · 98 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 13 recorded · 13 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 79 recorded · 77 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 82 recorded · 82 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 1 recorded · 1 measured · Source: the US BTS 15:00 · 67.8% · 206 recorded · 202 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 23 recorded · 22 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 11 recorded · 11 measured · Source: the US BTS 18:00 · 75.8% · 247 recorded · 240 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 196 recorded · 186 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 116 recorded · 111 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · Fewer than 200 measured departures · 2 recorded · 2 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 66 recorded · 62 measured · Source: the US BTS 07:00 · 1.7 min · 341 recorded · 339 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 60 recorded · 57 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 25 recorded · 25 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 101 recorded · 98 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 13 recorded · 13 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 79 recorded · 77 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 82 recorded · 82 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 1 recorded · 1 measured · Source: the US BTS 15:00 · 17.0 min · 206 recorded · 202 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 23 recorded · 22 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 11 recorded · 11 measured · Source: the US BTS 18:00 · 20.4 min · 247 recorded · 240 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 196 recorded · 186 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 116 recorded · 111 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · 2 · 2 recorded · 2 measured · Source: the US BTS 06:00 · 66 · 66 recorded · 62 measured · Source: the US BTS 07:00 · 341 · 341 recorded · 339 measured · Source: the US BTS 08:00 · 60 · 60 recorded · 57 measured · Source: the US BTS 09:00 · 25 · 25 recorded · 25 measured · Source: the US BTS 10:00 · 101 · 101 recorded · 98 measured · Source: the US BTS 11:00 · 13 · 13 recorded · 13 measured · Source: the US BTS 12:00 · 79 · 79 recorded · 77 measured · Source: the US BTS 13:00 · 82 · 82 recorded · 82 measured · Source: the US BTS 14:00 · 1 · 1 recorded · 1 measured · Source: the US BTS 15:00 · 206 · 206 recorded · 202 measured · Source: the US BTS 16:00 · 23 · 23 recorded · 22 measured · Source: the US BTS 17:00 · 11 · 11 recorded · 11 measured · Source: the US BTS 18:00 · 247 · 247 recorded · 240 measured · Source: the US BTS 19:00 · 196 · 196 recorded · 186 measured · Source: the US BTS 20:00 · 116 · 116 recorded · 111 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

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View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00No observations———
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00Fewer than 200 measured departures—22
06:00Fewer than 200 measured departures—6266
07:0090.3%1.7 min339341
08:00Fewer than 200 measured departures—5760
09:00Fewer than 200 measured departures—2525
10:00Fewer than 200 measured departures—98101
11:00Fewer than 200 measured departures—1313
12:00Fewer than 200 measured departures—7779
13:00Fewer than 200 measured departures—8282
14:00Fewer than 200 measured departures—11
15:0067.8%17.0 min202206
16:00Fewer than 200 measured departures—2223
17:00Fewer than 200 measured departures—1111
18:0075.8%20.4 min240247
19:00Fewer than 200 measured departures—186196
20:00Fewer than 200 measured departures—111116
21:00No observations———
22:00No observations———
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 82.9% · 242 recorded · 234 measured · Source: the US BTS Tuesday · 85.1% · 211 recorded · 201 measured · Source: the US BTS Wednesday · 85.9% · 210 recorded · 205 measured · Source: the US BTS Thursday · 75.0% · 240 recorded · 236 measured · Source: the US BTS Friday · 82.3% · 232 recorded · 226 measured · Source: the US BTS Saturday · Fewer than 200 measured departures · 194 recorded · 191 measured · Source: the US BTS Sunday · 80.9% · 240 recorded · 235 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Monday · 12.1 min · 242 recorded · 234 measured · Source: the US BTS Tuesday · 8.0 min · 211 recorded · 201 measured · Source: the US BTS Wednesday · 4.9 min · 210 recorded · 205 measured · Source: the US BTS Thursday · 17.7 min · 240 recorded · 236 measured · Source: the US BTS Friday · 8.0 min · 232 recorded · 226 measured · Source: the US BTS Saturday · Fewer than 200 measured departures · 194 recorded · 191 measured · Source: the US BTS Sunday · 6.8 min · 240 recorded · 235 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 242 · 242 recorded · 234 measured · Source: the US BTS Tuesday · 211 · 211 recorded · 201 measured · Source: the US BTS Wednesday · 210 · 210 recorded · 205 measured · Source: the US BTS Thursday · 240 · 240 recorded · 236 measured · Source: the US BTS Friday · 232 · 232 recorded · 226 measured · Source: the US BTS Saturday · 194 · 194 recorded · 191 measured · Source: the US BTS Sunday · 240 · 240 recorded · 235 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday82.9%12.1 min234242
Tuesday85.1%8.0 min201211
Wednesday85.9%4.9 min205210
Thursday75.0%17.7 min236240
Friday82.3%8.0 min226232
SaturdayFewer than 200 measured departures—191194
Sunday80.9%6.8 min235240

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Jan · Fewer than 200 measured departures · 51 recorded · 49 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 90 recorded · 83 measured · Source: the US BTS Mar · Fewer than 200 measured departures · 124 recorded · 121 measured · Source: the US BTS Apr · Fewer than 200 measured departures · 122 recorded · 122 measured · Source: the US BTS May · 86.0% · 245 recorded · 243 measured · Source: the US BTS Jun · Fewer than 200 measured departures · 194 recorded · 187 measured · Source: the US BTS Jul · 73.6% · 236 recorded · 220 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 72 recorded · 69 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 132 recorded · 131 measured · Source: the US BTS Oct · 83.7% · 233 recorded · 233 measured · Source: the US BTS Nov · Fewer than 200 measured departures · 35 recorded · 35 measured · Source: the US BTS Dec · Fewer than 200 measured departures · 35 recorded · 35 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · Fewer than 200 measured departures · 51 recorded · 49 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 90 recorded · 83 measured · Source: the US BTS Mar · Fewer than 200 measured departures · 124 recorded · 121 measured · Source: the US BTS Apr · Fewer than 200 measured departures · 122 recorded · 122 measured · Source: the US BTS May · 6.7 min · 245 recorded · 243 measured · Source: the US BTS Jun · Fewer than 200 measured departures · 194 recorded · 187 measured · Source: the US BTS Jul · 16.1 min · 236 recorded · 220 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 72 recorded · 69 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 132 recorded · 131 measured · Source: the US BTS Oct · 11.1 min · 233 recorded · 233 measured · Source: the US BTS Nov · Fewer than 200 measured departures · 35 recorded · 35 measured · Source: the US BTS Dec · Fewer than 200 measured departures · 35 recorded · 35 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 51 · 51 recorded · 49 measured · Source: the US BTS Feb · 90 · 90 recorded · 83 measured · Source: the US BTS Mar · 124 · 124 recorded · 121 measured · Source: the US BTS Apr · 122 · 122 recorded · 122 measured · Source: the US BTS May · 245 · 245 recorded · 243 measured · Source: the US BTS Jun · 194 · 194 recorded · 187 measured · Source: the US BTS Jul · 236 · 236 recorded · 220 measured · Source: the US BTS Aug · 72 · 72 recorded · 69 measured · Source: the US BTS Sep · 132 · 132 recorded · 131 measured · Source: the US BTS Oct · 233 · 233 recorded · 233 measured · Source: the US BTS Nov · 35 · 35 recorded · 35 measured · Source: the US BTS Dec · 35 · 35 recorded · 35 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
JanFewer than 200 measured departures—4951
FebFewer than 200 measured departures—8390
MarFewer than 200 measured departures—121124
AprFewer than 200 measured departures—122122
May86.0%6.7 min243245
JunFewer than 200 measured departures—187194
Jul73.6%16.1 min220236
AugFewer than 200 measured departures—6972
SepFewer than 200 measured departures—131132
Oct83.7%11.1 min233233
NovFewer than 200 measured departures—3535
DecFewer than 200 measured departures—3535

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

  • On time 79.6% 1,249
  • Delayed >15 min 17.8% 279
  • Cancelled 2.6% 41
  • Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.

Flight numbers on this route

15
15 of 15
Flight numbersBy direction DeparturesOn time
YX4750 SDF → PHL 318 90.5%
YX4466 PHL → SDF 291 81.7%
OH5352 PHL → SDF 54 76.9%
OH5369 SDF → PHL 54 57.7%
YX4727 SDF → PHL 54 96.1%
YX4728 PHL → SDF 54 94.1%
OH5339 PHL → SDF 45 78.6%
OH5339 SDF → PHL 45 78.6%
OH5394 PHL → SDF 41 60.5%
OH5394 SDF → PHL 41 59.5%
YX4720 PHL → SDF 41 80.5%
YX4720 SDF → PHL 41 82.9%
OH5383 PHL → SDF 40 87.5%
YX4652 PHL → SDF 37 77.8%
YX4654 SDF → PHL 36 91.4%

Flight numbers are the codes sold on tickets. On shared flights one aircraft can carry several of them. Only numbers with at least 30 flights have a page.

Monthly figures
PeriodFlights operated Change vs last yearCancelled On-time departures
July 2026 115 +9.5% 9 63.5%
June 2026 123 +92.2% 3 82.1%
May 2026 141 +38.2% 1 92.2%
April 2026 122 0 86.9%
March 2026 121 3 80.2%
February 2026 83 7 84.3%
January 2026 49 2 81.6%
December 2025 35 0 68.6%
November 2025 25 +150.0% 0 68.0%
October 2025 173 +188.3% 0 80.3%
September 2025 131 1 87.8%
August 2025 69 3 82.6%
July 2025 105 7 84.8%
June 2025 64 4 73.4%
May 2025 102 1 77.5%
November 2024 10 0 90.0%
October 2024 60 0 93.3%

How to read this chart

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