Flight Check

Best Airline: ORD to SEA

Chicago to Seattle — airline reliability comparison

United Airlines is the most reliable airline on the ORD to SEA route with a 81% on-time rate, compared to Alaska Airlines at 73%. Based on 5,449 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 Airlines81%
Delta Air Lines79%
American Airlines75%
Alaska Airlines73%

ORD to SEA Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest81%0.7%60m5,449
Delta Air LinesDL79%1.1%73m3,259
American AirlinesAA75%1.2%67m3,287
Alaska AirlinesASWorst73%1.1%58m6,533

Route Overview

76%
Overall On-Time
63m
Avg Delay
1%
Cancel Rate
18,528
Total Flights
ORD to SEA Route DetailsReturn: SEA to ORD
ORD AirportSEA Airport

Flying out of ORD? We'll brief you.

Delays, TSA, weather, gates — we'll let you know if something matters.

Free. No account needed.

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