Which airline has the most delays LAX to SEA?

JetBlue Airways has the lowest on-time rate on the LAX to SEA route at 80%.

Which airline cancels the most flights LAX to SEA?

Frontier Airlines has the highest cancellation rate on this route at 2.4%.

Best Airline: LAX to SEA

Q: Which airline is most reliable LAX to SEA?

Delta Air Lines is the most reliable airline on the LAX to SEA route with a 88% on-time arrival rate.

Los Angeles to Seattle — airline reliability comparison

Delta Air Lines is the most reliable airline on the LAX to SEA route with a 88% on-time rate, compared to JetBlue Airways at 80%. Based on 7,985 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

Delta Air Lines88%

United Airlines86%

Spirit Airlines86%

SkyWest Airlines85%

Alaska Airlines84%

Frontier Airlines83%

American Airlines80%

JetBlue Airways80%

LAX to SEA Airline Comparison

Airline	On-Time %	Cancel %	Avg Delay	Flights
Delta Air LinesDLBest	88%	0.6%	67m	7,985
United AirlinesUA	86%	0.8%	61m	2,037
Spirit AirlinesNK	86%	0.5%	77m	270
SkyWest AirlinesOO	85%	0.3%	64m	3,500
Alaska AirlinesAS	84%	1.3%	54m	12,151
Frontier AirlinesF9	83%	2.4%	70m	474
American AirlinesAA	80%	0.0%	159m	10
JetBlue AirwaysB6Worst	80%	0.5%	63m	354

Route Overview

86%

Overall On-Time

61m

Avg Delay

0.9%

Cancel Rate

26,794

Total Flights

LAX to SEA Route Details Return: SEA to LAX

LAX Airport SEA Airport

Flying out of LAX? 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.