Which airline has the most delays SEA to LAX?

JetBlue Airways has the lowest on-time rate on the SEA to LAX route at 68%.

Which airline cancels the most flights SEA to LAX?

JetBlue Airways has the highest cancellation rate on this route at 2.8%.

Best Airline: SEA to LAX

Q: Which airline is most reliable SEA to LAX?

United Airlines is the most reliable airline on the SEA to LAX route with a 91% on-time arrival rate.

Seattle to Los Angeles — airline reliability comparison

United Airlines is the most reliable airline on the SEA to LAX route with a 91% on-time rate, compared to JetBlue Airways at 68%. Based on 2,039 flights tracked.

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

Source: Bureau of Transportation Statistics. Updated October 2026.

On-Time Rate by Airline

United Airlines91%

American Airlines90%

Spirit Airlines87%

SkyWest Airlines86%

Delta Air Lines86%

Frontier Airlines81%

Alaska Airlines79%

JetBlue Airways68%

SEA to LAX Airline Comparison

Airline	On-Time %	Cancel %	Avg Delay	Flights
United AirlinesUABest	91%	0.7%	104m	2,039
American AirlinesAA	90%	0.0%	149m	10
Spirit AirlinesNK	87%	1.1%	83m	272
SkyWest AirlinesOO	86%	0.3%	90m	3,503
Delta Air LinesDL	86%	0.5%	57m	7,987
Frontier AirlinesF9	81%	2.6%	55m	474
Alaska AirlinesAS	79%	1.1%	45m	12,142
JetBlue AirwaysB6Worst	68%	2.8%	71m	354

Route Overview

83%

Overall On-Time

57m

Avg Delay

0.8%

Cancel Rate

26,794

Total Flights

SEA to LAX Route Details Return: LAX to SEA

SEA Airport LAX Airport

Flying out of SEA? We'll brief you.

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

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