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1,031 km · Domestic

Newark Liberty (EWR) – Louisville Muhammad Ali (SDF)

In July 2026, 162 flights operated between Newark Liberty and Louisville Muhammad Ali (both directions), and 84.0% 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 periods19 periods
PeriodFlights operated 2025Flights operated 2026Change vs last year
January161158▼ 1.9%
February163144▼ 11.7%
March173171▼ 1.2%
April104166▲ 59.6%
May119178▲ 49.6%
June134176▲ 31.3%
July135162▲ 20.0%
August128––
September123––
October184–in progress
November159––
December141––
Year to date (Jan–Jul)9891,155▲ 16.8%

On-time departures by month

Departures within 15 minutes of schedule.

The most recent periods19 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January91.3%84.8%▼ 7.1%
February89.6%91.7%▲ 2.3%
March94.2%77.2%▼ 18.0%
April85.6%89.8%▲ 4.9%
May68.1%94.4%▲ 38.6%
June80.6%84.7%▲ 5.1%
July75.6%84.0%▲ 11.1%
August83.6%––
September90.2%––
October84.8%–in progress
November84.3%––
December79.4%––
Year-to-date average (Jan–Jul)83.6%86.7%▲ 3.7%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January1015▲ 50.0%
February316▲ 433.3%
March15▲ 400.0%
April80▼ 100.0%
May124▼ 66.7%
June74▼ 42.9%
July1122▲ 100.0%
August2––
September3––
October2–in progress
November13––
December8––
Year to date (Jan–Jul)5266▲ 26.9%

Airlines on this route

  1. Republic Airways 97.8%
  2. Spirit Airlines 1.8%
  3. United Airlines 0.5%

Oct 1, 2024 – Jul 31, 2026

By direction

EWR → SDF

Scheduled flights
1,735
Flights operated
1,656
Cancelled
79 · 4.6%
On-time departures
84.2%

SDF → EWR

Scheduled flights
1,731
Flights operated
1,661
Cancelled
70 · 4.0%
On-time departures
86.5%

EWR → SDF and SDF → EWR counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Republic Airways YX 3,389 97.8% 85.9% 144
Spirit Airlines NK 61 1.8% 69.6% 5
United Airlines UA 16 0.5% 25.0% 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 delay06:00–07:00-0.0min · 525 recorded · 508 measured
Gap to highest-delay hour20.7min06:00 ↔ 20:00
Recorded flights3,466EWR–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 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 92.5% · 525 recorded · 508 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 60 recorded · 60 measured · Source: the US BTS 08:00 · 93.7% · 260 recorded · 255 measured · Source: the US BTS 09:00 · 92.2% · 222 recorded · 217 measured · Source: the US BTS 10:00 · 90.5% · 386 recorded · 377 measured · Source: the US BTS 11:00 · 89.7% · 269 recorded · 263 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 120 recorded · 113 measured · Source: the US BTS 13:00 · 78.3% · 297 recorded · 285 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 123 recorded · 114 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 84 recorded · 75 measured · Source: the US BTS 16:00 · 85.9% · 212 recorded · 205 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 186 recorded · 178 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 128 recorded · 119 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 164 recorded · 153 measured · Source: the US BTS 20:00 · 72.0% · 310 recorded · 286 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 120 recorded · 109 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · -0.0 min · 525 recorded · 508 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 60 recorded · 60 measured · Source: the US BTS 08:00 · 0.3 min · 260 recorded · 255 measured · Source: the US BTS 09:00 · 1.4 min · 222 recorded · 217 measured · Source: the US BTS 10:00 · 2.3 min · 386 recorded · 377 measured · Source: the US BTS 11:00 · 3.7 min · 269 recorded · 263 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 120 recorded · 113 measured · Source: the US BTS 13:00 · 12.0 min · 297 recorded · 285 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 123 recorded · 114 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 84 recorded · 75 measured · Source: the US BTS 16:00 · 3.9 min · 212 recorded · 205 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 186 recorded · 178 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 128 recorded · 119 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 164 recorded · 153 measured · Source: the US BTS 20:00 · 20.7 min · 310 recorded · 286 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 120 recorded · 109 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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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 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 525 · 525 recorded · 508 measured · Source: the US BTS 07:00 · 60 · 60 recorded · 60 measured · Source: the US BTS 08:00 · 260 · 260 recorded · 255 measured · Source: the US BTS 09:00 · 222 · 222 recorded · 217 measured · Source: the US BTS 10:00 · 386 · 386 recorded · 377 measured · Source: the US BTS 11:00 · 269 · 269 recorded · 263 measured · Source: the US BTS 12:00 · 120 · 120 recorded · 113 measured · Source: the US BTS 13:00 · 297 · 297 recorded · 285 measured · Source: the US BTS 14:00 · 123 · 123 recorded · 114 measured · Source: the US BTS 15:00 · 84 · 84 recorded · 75 measured · Source: the US BTS 16:00 · 212 · 212 recorded · 205 measured · Source: the US BTS 17:00 · 186 · 186 recorded · 178 measured · Source: the US BTS 18:00 · 128 · 128 recorded · 119 measured · Source: the US BTS 19:00 · 164 · 164 recorded · 153 measured · Source: the US BTS 20:00 · 310 · 310 recorded · 286 measured · Source: the US BTS 21:00 · 120 · 120 recorded · 109 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———
05:00No observations———
06:0092.5%-0.0 min508525
07:00Fewer than 200 measured departures—6060
08:0093.7%0.3 min255260
09:0092.2%1.4 min217222
10:0090.5%2.3 min377386
11:0089.7%3.7 min263269
12:00Fewer than 200 measured departures—113120
13:0078.3%12.0 min285297
14:00Fewer than 200 measured departures—114123
15:00Fewer than 200 measured departures—7584
16:0085.9%3.9 min205212
17:00Fewer than 200 measured departures—178186
18:00Fewer than 200 measured departures—119128
19:00Fewer than 200 measured departures—153164
20:0072.0%20.7 min286310
21:00Fewer than 200 measured departures—109120
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 · 85.8% · 516 recorded · 486 measured · Source: the US BTS Tuesday · 88.7% · 498 recorded · 478 measured · Source: the US BTS Wednesday · 89.3% · 500 recorded · 485 measured · Source: the US BTS Thursday · 83.6% · 506 recorded · 488 measured · Source: the US BTS Friday · 81.5% · 517 recorded · 503 measured · Source: the US BTS Saturday · 85.4% · 429 recorded · 418 measured · Source: the US BTS Sunday · 83.2% · 500 recorded · 459 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 · 5.9 min · 516 recorded · 486 measured · Source: the US BTS Tuesday · 2.4 min · 498 recorded · 478 measured · Source: the US BTS Wednesday · 2.0 min · 500 recorded · 485 measured · Source: the US BTS Thursday · 10.9 min · 506 recorded · 488 measured · Source: the US BTS Friday · 8.2 min · 517 recorded · 503 measured · Source: the US BTS Saturday · 12.7 min · 429 recorded · 418 measured · Source: the US BTS Sunday · 11.0 min · 500 recorded · 459 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 · 516 · 516 recorded · 486 measured · Source: the US BTS Tuesday · 498 · 498 recorded · 478 measured · Source: the US BTS Wednesday · 500 · 500 recorded · 485 measured · Source: the US BTS Thursday · 506 · 506 recorded · 488 measured · Source: the US BTS Friday · 517 · 517 recorded · 503 measured · Source: the US BTS Saturday · 429 · 429 recorded · 418 measured · Source: the US BTS Sunday · 500 · 500 recorded · 459 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday85.8%5.9 min486516
Tuesday88.7%2.4 min478498
Wednesday89.3%2.0 min485500
Thursday83.6%10.9 min488506
Friday81.5%8.2 min503517
Saturday85.4%12.7 min418429
Sunday83.2%11.0 min459500

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 · 88.1% · 344 recorded · 319 measured · Source: the US BTS Feb · 90.6% · 326 recorded · 307 measured · Source: the US BTS Mar · 85.8% · 350 recorded · 344 measured · Source: the US BTS Apr · 88.2% · 278 recorded · 270 measured · Source: the US BTS May · 83.8% · 313 recorded · 297 measured · Source: the US BTS Jun · 82.9% · 321 recorded · 310 measured · Source: the US BTS Jul · 80.1% · 330 recorded · 297 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 130 recorded · 128 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 126 recorded · 123 measured · Source: the US BTS Oct · 87.1% · 305 recorded · 303 measured · Source: the US BTS Nov · 83.6% · 338 recorded · 324 measured · Source: the US BTS Dec · 82.0% · 305 recorded · 295 measured · Source: the US BTS

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Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · 1.4 min · 344 recorded · 319 measured · Source: the US BTS Feb · -1.4 min · 326 recorded · 307 measured · Source: the US BTS Mar · 4.8 min · 350 recorded · 344 measured · Source: the US BTS Apr · 2.0 min · 278 recorded · 270 measured · Source: the US BTS May · 15.5 min · 313 recorded · 297 measured · Source: the US BTS Jun · 14.7 min · 321 recorded · 310 measured · Source: the US BTS Jul · 21.6 min · 330 recorded · 297 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 130 recorded · 128 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 126 recorded · 123 measured · Source: the US BTS Oct · 2.7 min · 305 recorded · 303 measured · Source: the US BTS Nov · 6.2 min · 338 recorded · 324 measured · Source: the US BTS Dec · 7.6 min · 305 recorded · 295 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 · 344 · 344 recorded · 319 measured · Source: the US BTS Feb · 326 · 326 recorded · 307 measured · Source: the US BTS Mar · 350 · 350 recorded · 344 measured · Source: the US BTS Apr · 278 · 278 recorded · 270 measured · Source: the US BTS May · 313 · 313 recorded · 297 measured · Source: the US BTS Jun · 321 · 321 recorded · 310 measured · Source: the US BTS Jul · 330 · 330 recorded · 297 measured · Source: the US BTS Aug · 130 · 130 recorded · 128 measured · Source: the US BTS Sep · 126 · 126 recorded · 123 measured · Source: the US BTS Oct · 305 · 305 recorded · 303 measured · Source: the US BTS Nov · 338 · 338 recorded · 324 measured · Source: the US BTS Dec · 305 · 305 recorded · 295 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan88.1%1.4 min319344
Feb90.6%-1.4 min307326
Mar85.8%4.8 min344350
Apr88.2%2.0 min270278
May83.8%15.5 min297313
Jun82.9%14.7 min310321
Jul80.1%21.6 min297330
AugFewer than 200 measured departures—128130
SepFewer than 200 measured departures—123126
Oct87.1%2.7 min303305
Nov83.6%6.2 min324338
Dec82.0%7.6 min295305

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 81.7% 2,831
  • Delayed >15 min 14.0% 486
  • Cancelled 4.3% 149
  • 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

26
26 of 26
Flight numbersBy direction DeparturesOn time
YX3594 SDF → EWR 488 93.0%
YX3609 EWR → SDF 434 77.0%
YX3412 SDF → EWR 320 74.6%
YX3678 EWR → SDF 293 91.4%
YX3682 SDF → EWR 287 92.5%
YX3531 EWR → SDF 200 77.1%
YX3415 EWR → SDF 103 91.8%
YX3629 EWR → SDF 93 94.4%
YX3693 EWR → SDF 89 81.8%
YX3421 EWR → SDF 72 90.1%
YX3452 SDF → EWR 61 81.0%
YX3714 EWR → SDF 53 84.6%
YX3512 SDF → EWR 52 90.4%
YX3512 EWR → SDF 37 62.5%
YX3544 SDF → EWR 37 85.3%
YX3694 SDF → EWR 37 84.9%
YX3419 SDF → EWR 36 88.9%
YX3623 SDF → EWR 36 87.5%
YX3639 EWR → SDF 36 82.9%
YX3483 EWR → SDF 35 78.1%
YX3661 SDF → EWR 35 80.0%
YX3480 SDF → EWR 31 83.9%
YX3496 EWR → SDF 31 96.8%
YX3615 SDF → EWR 31 96.8%
YX3654 SDF → EWR 31 87.1%
YX3508 EWR → SDF 30 96.7%

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 162 +20.0% 22 84.0%
June 2026 176 +31.3% 4 84.7%
May 2026 178 +49.6% 4 94.4%
April 2026 166 +59.6% 0 89.8%
March 2026 171 −1.2% 5 77.2%
February 2026 144 −11.7% 16 91.7%
January 2026 158 −1.9% 15 84.8%
December 2025 141 −8.4% 8 79.4%
November 2025 159 −3.6% 13 84.3%
October 2025 184 +54.6% 2 84.8%
September 2025 123 3 90.2%
August 2025 128 2 83.6%
July 2025 135 11 75.6%
June 2025 134 7 80.6%
May 2025 119 12 68.1%
April 2025 104 8 85.6%
March 2025 173 1 94.2%
February 2025 163 3 89.6%
January 2025 161 10 91.3%
December 2024 154 2 84.4%
November 2024 165 1 83.0%
October 2024 119 0 90.8%

How to read this chart

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