Flight Check

Best Airline: DEN to PDX

Denver to Portland — airline reliability comparison

Alaska Airlines is the most reliable airline on the DEN to PDX route with a 82% on-time rate, compared to Southwest Airlines at 69%. Based on 1,705 flights tracked.

This route involves weather-prone airports and high-congestion airports, which can affect reliability regardless of airline.

Source: Bureau of Transportation Statistics. Updated October 2026.

On-Time Rate by Airline

Alaska Airlines82%
United Airlines81%
Frontier Airlines77%
Southwest Airlines69%

DEN to PDX Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Alaska AirlinesASBest82%1.7%58m1,705
United AirlinesUA81%0.8%64m6,632
Frontier AirlinesF977%1.0%55m1,498
Southwest AirlinesWNWorst69%0.9%49m5,921

Route Overview

76%
Overall On-Time
56m
Avg Delay
0.9%
Cancel Rate
15,783
Total Flights
DEN to PDX Route DetailsReturn: PDX to DEN
DEN AirportPDX Airport

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Data last updated October 2026. Source: Bureau of Transportation Statistics.