PlainFlights

SEA 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
SEA

Seattle, WA

Seattle, Washington

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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 SEA PDX
On-Time Rate (higher is better) 83.1% 84.4%
Avg Delay (lower is better) 63.4 min 66.7 min
Delay Rate (lower is better) 16.9% 15.6%
Cancellation Rate (lower is better) 0.73% 0.83%
Total Flights 1,871,155 661,488
Delayed Flights 315,819 103,008
Cancelled Flights 13,720 5,511
Top Delay Cause Carrier Carrier

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

Delay Cause Breakdown

SEA - Seattle, WA

Carrier 44.3%
Late Aircraft 28.6%
NAS 21.0%
Weather 5.8%
Security 0.3%

PDX - Portland, OR

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

Top Routes

Top routes from SEA

Route Flights On-Time
SEA → LAX
Los Angeles
41,859 84%
LAX → SEA
Seattle
41,819 86.2%
SEA → ANC
Anchorage
41,143 77.5%
ANC → SEA
Seattle
41,064 85.8%
PHX → SEA
Seattle
38,561 84.3%
SEA → PHX
Phoenix
38,549 82.3%

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.