OnTimeStats

Historical on-time performance

Chicago to Bangor

978 miData through Dec 2025Source: US DOT · BTS

Flights on ORD–BGR arrive on time 83% of the time over the last 12 months.

On-time rate83%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights

based on 478 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Too close to call — no single carrier is clearly more on-time here.

  • Envoy Air
    On-time86%
    Medianon time
    p9025 min
    Cancel0.0%
    Flights124
  • Republic Airways
    On-time82%
    Medianon time
    p9030 min
    Cancel0.3%
    Flights324
  • American Airlines
    On-time73%
    Medianon time
    p90100 min
    Cancel0.0%
    Flights30

Why flights run late

Delay causes

  • Airline39%
  • Weather2%
  • Air traffic (NAS)11%
  • Late aircraft49%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly ORD → BGR

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

Best time of day

Mornings are the most reliable time of day to fly this route — 87% on time.

  • Mornings87% on time · p90 15 min · 243 flights
  • Middays80% on time · p90 30 min · 823 flights
  • Evenings76% on time · p90 45 min · 132 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 75% to 87% on time.

  • Tuesdays87% on time · p90 15 min · 141 flights · limited
  • Saturdays85% on time · p90 20 min · 203 flights
  • Wednesdays82% on time · p90 30 min · 151 flights · limited
  • Sundays81% on time · p90 35 min · 191 flights · limited
  • Thursdays81% on time · p90 45 min · 179 flights · limited
  • Mondays75% on time · p90 45 min · 155 flights · limited
  • Fridays75% on time · p90 35 min · 179 flights · limited
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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.