Flight Check

Best Airline: SMF to DEN

Sacramento to Denver — airline reliability comparison

United Airlines is the most reliable airline on the SMF to DEN route with a 89% on-time rate, compared to Frontier Airlines at 75%. Based on 6,517 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

United Airlines89%
Southwest Airlines80%
Frontier Airlines75%

SMF to DEN Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest89%0.8%72m6,517
Southwest AirlinesWN80%0.6%49m6,865
Frontier AirlinesF9Worst75%0.8%63m591

Route Overview

84%
Overall On-Time
58m
Avg Delay
0.7%
Cancel Rate
14,012
Total Flights
SMF to DEN Route DetailsReturn: DEN to SMF
SMF AirportDEN Airport

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