OnTimeStats

Historical on-time performance

San Francisco to Indianapolis

1,943 miData through May 2026Source: US DOT · BTS

Flights on SFO–IND arrive on time 80% of the time over the last 12 months.

On-time rate80%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights

based on 500 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlines
    On-time80%
    Medianon time
    p9035 min
    Cancel0.2%
    Flights500

Why flights run late

Delay causes

  • Airline36%
  • Weather1%
  • Air traffic (NAS)18%
  • Late aircraft45%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline100%
  • Weather0%
  • Air traffic (NAS)0%
  • Security0%

Most cancellations here are attributed to Airline. Shares are among 1 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 SFO → IND

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 85% on time.

  • Middays85% on time · p90 30 min · 368 flights
  • Mornings82% on time · p90 30 min · 146 flights · limited
  • Overnights79% on time · p90 30 min · 638 flights
  • Afternoons74% on time · p90 60 min · 212 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 75% to 85% on time.

  • Tuesdays85% on time · p90 20 min · 174 flights · limited
  • Saturdays84% on time · p90 35 min · 171 flights · limited
  • Fridays83% on time · p90 50 min · 200 flights
  • Wednesdays82% on time · p90 25 min · 182 flights · limited
  • Mondays79% on time · p90 45 min · 211 flights
  • Sundays76% on time · p90 40 min · 213 flights
  • Thursdays75% on time · p90 35 min · 213 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.