Flight Check

Best Airline: SEA to EWR

Seattle to Newark — airline reliability comparison

United Airlines is the most reliable airline on the SEA to EWR route with a 82% on-time rate, compared to Alaska Airlines at 78%. Based on 3,566 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 Airlines82%
Alaska Airlines78%

SEA to EWR Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest82%1.4%77m3,566
Alaska AirlinesASWorst78%1.9%53m3,815

Route Overview

80%
Overall On-Time
65m
Avg Delay
1.7%
Cancel Rate
7,381
Total Flights
SEA to EWR Route DetailsReturn: EWR to SEA
SEA AirportEWR Airport

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