OnTimeStats

Historical on-time performance

Cincinnati to Seattle

1,964 miData through May 2026Source: US DOT · BTS

Flights on CVG–SEA arrive on time 75% of the time over the last 12 months.

On-time rate75%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled1.4%of scheduled flights

based on 649 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Delta Air Linesbest
    On-time85%
    Medianon time
    p9020 min
    Cancel0.7%
    Flights306
  • Alaska Airlines
    On-time65%
    Medianon time
    p9055 min
    Cancel2.0%
    Flights343

Why flights run late

Delay causes

  • Airline27%
  • Weather7%
  • Air traffic (NAS)31%
  • Late aircraft35%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline44%
  • Weather56%
  • Air traffic (NAS)0%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 9 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 CVG → SEA

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 78% to 85% on time.

  • Afternoons85% on time · p90 20 min · 131 flights · limited
  • Evenings78% on time · p90 35 min · 1,429 flights
  • Mornings78% on time · p90 30 min · 650 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 72% to 85% on time.

  • Wednesdays85% on time · p90 25 min · 320 flights
  • Tuesdays84% on time · p90 25 min · 305 flights
  • Saturdays80% on time · p90 25 min · 298 flights
  • Fridays78% on time · p90 25 min · 322 flights
  • Thursdays77% on time · p90 35 min · 319 flights
  • Mondays77% on time · p90 40 min · 322 flights
  • Sundays72% on time · p90 50 min · 324 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.