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DEN vs PHL - 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
DEN

Denver, CO

Denver, Colorado

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Airport B
PHL

Philadelphia, PA

Philadelphia, Pennsylvania

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Key Performance Metrics

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

Metric DEN PHL
On-Time Rate (higher is better) 78.9% 81.3%
Avg Delay (lower is better) 70.9 min 84.7 min
Delay Rate (lower is better) 21.1% 18.7%
Cancellation Rate (lower is better) 1.02% 1.19%
Total Flights 3,293,040 1,060,086
Delayed Flights 696,109 198,194
Cancelled Flights 33,645 12,586
Top Delay Cause Late Aircraft Late Aircraft

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

Delay Cause Breakdown

DEN - Denver, CO

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

PHL - Philadelphia, PA

Late Aircraft 41.1%
Carrier 31.7%
NAS 22.4%
Weather 4.7%
Security 0.2%

Top Routes

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%

Top routes from PHL

Route Flights On-Time
MCO → PHL
Philadelphia
32,254 74.8%
PHL → MCO
Orlando
32,240 76.4%
ATL → PHL
Philadelphia
32,104 80.2%
PHL → ATL
Atlanta
32,089 83.4%
PHL → BOS
Boston
26,321 82%
BOS → PHL
Philadelphia
26,282 83.5%

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.