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Route Reliability

Los Angeles → Seattle

LAX–SEA · 954 miles · Los Angeles International Airport to Seattle–Tacoma International Airport

89
Pretty Reliable
WanderNerd Reliability Score
86%
Arrive within 15 minutes
2 min early
Average arrival delay
1.0%
Cancelled
7,424
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.United Airlines88%943 flights
  2. 2.Delta Air Lines88%2,222 flights
  3. 3.Alaska Airlines85%3,303 flights
  4. 4.Frontier Airlines81%261 flights
  5. 5.American Airlines79%695 flights

What the data says

Morning-you made the right choice.

LAX–SEA flights departing between 6–9 AM arrived on time 89% of the time, versus 82% between 6–9 PM.

Friday is doing you no favors.

LAX–SEA flights arrived on time 89% of the time on Tuesdays. On Fridays: 81%.

United Airlines runs this route best.

United Airlines arrived on time 88% of the time on this route; American Airlines managed 79%.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon87%(1121 flights)
  • Tue89%(975 flights)
  • Wed88%(992 flights)
  • Thu85%(1108 flights)
  • Fri81%(1074 flights)
  • Sat87%(949 flights)
  • Sun84%(1121 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM89%(1325 flights)
  • 9 AM–12 PM87%(1502 flights)
  • 12–3 PM87%(1091 flights)
  • 3–6 PM86%(1492 flights)
  • 6–9 PM82%(1684 flights)
  • 9 PM–12 AM82%(245 flights)
On-time trend by month
86%
May

Jun 78% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202578%629
July 202581%635
August 202582%632
September 202593%603
October 202589%610
November 202591%596
December 202583%616
January 202686%556
February 202688%553
March 202685%624
April 202688%608
May 202686%678

Same trip, other airports

Keep nerding

Based on 7,424 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.