PlainFlights

SDF vs DEN - Airport Comparison

Select two airports to compare on-time performance, delays, cancellations, and top routes using U.S. Department of Transportation Bureau of Transportation Statistics (BTS) data (2020–2025) across all 50 states. See our methodology for how metrics are computed.

Airport A
SDF

Louisville, KY

Louisville, Kentucky

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Airport B
DEN

Denver, CO

Denver, Colorado

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Key Performance Metrics

BTS on-time performance data, 2020–2025 cumulative.

Metric SDF DEN
On-Time Rate (higher is better) 82.8% 78.9%
Avg Delay (lower is better) 78.6 min 70.9 min
Delay Rate (lower is better) 17.2% 21.1%
Cancellation Rate (lower is better) 1.24% 1.02%
Total Flights 252,784 3,293,040
Delayed Flights 43,419 696,109
Cancelled Flights 3,127 33,645
Top Delay Cause Carrier Late Aircraft

✓ / ▲ indicates the more favorable value. Data: BTS On-Time Performance, 2020–2025.

Delay Cause Breakdown

SDF - Louisville, KY

Carrier 38.1%
Late Aircraft 33.8%
NAS 21.6%
Weather 6.3%
Security 0.2%

DEN - Denver, CO

Late Aircraft 40.9%
Carrier 38.6%
NAS 15.3%
Weather 5.2%
Security 0.1%

Top Routes

Top routes from SDF

Route Flights On-Time
SDF → ATL
Atlanta
16,538 89.5%
ATL → SDF
Louisville
16,535 86.5%
SDF → DFW
Dallas/Fort Worth
11,294 78.2%
DFW → SDF
Louisville
11,290 75.7%
CLT → SDF
Louisville
11,247 80.2%
SDF → CLT
Charlotte
11,237 82.5%

Top routes from DEN

Route Flights On-Time
PHX → DEN
Denver
49,558 80.7%
DEN → PHX
Phoenix
49,508 77.8%
LAS → DEN
Denver
44,661 77.7%
DEN → LAS
Las Vegas
44,636 76.1%
DEN → SLC
Salt Lake City
43,089 78.3%
SLC → DEN
Denver
43,051 78.8%

Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data (2020–2025) Bureau of Transportation Statistics (BTS), On-Time Performance Data (2020–2025) On-time rates exclude cancelled and diverted flights. PlainFlights is not affiliated with BTS or the DOT

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This tool queries live on-time, delay, and cancellation figures for the two selected airports from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.