PlainFlights

ONT vs PDX - 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
ONT

Ontario, CA

Ontario, California

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Airport B
PDX

Portland, OR

Portland, Oregon

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Key Performance Metrics

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

Metric ONT PDX
On-Time Rate (higher is better) 82.3% 84.4%
Avg Delay (lower is better) 67.3 min 66.7 min
Delay Rate (lower is better) 17.7% 15.6%
Cancellation Rate (lower is better) 0.92% 0.83%
Total Flights 272,856 661,488
Delayed Flights 48,267 103,008
Cancelled Flights 2,519 5,511
Top Delay Cause Late Aircraft Carrier

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

Delay Cause Breakdown

ONT - Ontario, CA

Late Aircraft 43.6%
Carrier 35.3%
NAS 17.7%
Weather 3.3%
Security 0.1%

PDX - Portland, OR

Carrier 38.4%
Late Aircraft 36.9%
NAS 20.2%
Weather 4.3%
Security 0.2%

Top Routes

Top routes from ONT

Route Flights On-Time
PHX → ONT
Ontario
16,938 81.2%
ONT → PHX
Phoenix
16,845 85%
DEN → ONT
Ontario
14,378 75.1%
ONT → DEN
Denver
14,321 84%
SEA → ONT
Ontario
12,866 83.5%
ONT → SEA
Seattle
12,860 87.1%

Top routes from PDX

Route Flights On-Time
PDX → SEA
Seattle
36,148 87.7%
SEA → PDX
Portland
35,578 83.7%
LAX → PDX
Portland
25,109 86.5%
PDX → LAX
Los Angeles
24,956 87.7%
PDX → DEN
Denver
23,123 84.1%
DEN → PDX
Portland
23,121 77.1%

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.