OnTimeStats

Historical on-time performance

Denver to Anchorage

2,405 miData through Dec 2025Source: US DOT · BTS

Flights on DEN–ANC arrive on time 74% of the time over the last 12 months.

On-time rate74%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights

based on 562 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlinesbest
    On-time77%
    Medianon time
    p9030 min
    Cancel0.0%
    Flights460
  • Alaska Airlines
    On-time61%
    Medianon time
    p9060 min
    Cancel1.0%
    Flights102

Why flights run late

Delay causes

  • Airline42%
  • Weather2%
  • Air traffic (NAS)34%
  • Late aircraft22%
  • Security0%

Most delay minutes here are attributed to Airline.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly DEN → ANC

All airlines · rolling 36 months (2023-01 .. 2025-12).

Best time of day

Middays are the most reliable time of day to fly this route — 81% on time.

  • Middays81% on time · p90 25 min · 320 flights
  • Evenings76% on time · p90 35 min · 1,092 flights
  • Mornings74% on time · p90 55 min · 323 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 70% to 81% on time.

  • Sundays81% on time · p90 25 min · 253 flights
  • Mondays79% on time · p90 35 min · 248 flights
  • Tuesdays78% on time · p90 35 min · 246 flights
  • Wednesdays78% on time · p90 40 min · 245 flights
  • Thursdays77% on time · p90 30 min · 248 flights
  • Saturdays72% on time · p90 45 min · 272 flights
  • Fridays70% on time · p90 45 min · 248 flights
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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.