OnTimeStats

Historical on-time performance

Salt Lake City to Long Beach

589 miData through May 2026Source: US DOT · BTS

Flights on SLC–LGB arrive on time 87% of the time over the last 12 months.

On-time rate87%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights

based on 1,512 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlinesbest
    On-time94%
    Medianon time
    p905 min
    Cancel0.0%
    Flights623
  • Delta Air Lines
    On-time88%
    Medianon time
    p9015 min
    Cancel0.5%
    Flights438
  • Southwest Airlines
    On-time77%
    Medianon time
    p9035 min
    Cancel0.2%
    Flights451

Why flights run late

Delay causes

  • Airline43%
  • Weather6%
  • Air traffic (NAS)9%
  • Late aircraft42%
  • Security0%

Most delay minutes here are attributed to Airline.

When flights don't go

Why flights were cancelled

  • Airline33%
  • Weather67%
  • Air traffic (NAS)0%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 3 cancellations with a reported cause (BTS reports causes from June 2003).

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly SLC → LGB

All airlines · rolling 36 months (2023-06 .. 2026-05).

Best time of day

On-time rates are fairly even by time of day on this route — ranging from 74% to 90% on time.

  • Afternoons90% on time · p90 10 min · 1,184 flights
  • Overnights90% on time · p90 10 min · 1,103 flights
  • Middays87% on time · p90 15 min · 1,834 flights
  • Evenings74% on time · p90 40 min · 481 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 84% to 92% on time.

  • Saturdays92% on time · p90 10 min · 624 flights
  • Tuesdays90% on time · p90 10 min · 631 flights
  • Mondays88% on time · p90 15 min · 709 flights
  • Wednesdays88% on time · p90 15 min · 625 flights
  • Thursdays87% on time · p90 15 min · 707 flights
  • Fridays85% on time · p90 20 min · 714 flights
  • Sundays84% on time · p90 20 min · 676 flights

Keep exploring

Related pages

Methodology

A flight is on time when it arrives within 15 minutes of schedule — the US DOT / BTS standard. Median and p90(the “1-in-10 bad day”) are read from the full arrival-delay distribution, never averaged across periods.

Figures cover a carrier’s own BTS-coded flights. Cells below ~200 flights are flagged as limited data. All numbers are pre-computed from public BTS On-Time Performance data.