OnTimeStats

Historical on-time performance

Denver to Baltimore

1,491 miData through May 2026Source: US DOT · BTS

Flights on DEN–BWI arrive on time 76% of the time over the last 12 months.

On-time rate76%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled1.3%of scheduled flights

based on 2,848 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlinesbest
    On-time80%
    Medianon time
    p9030 min
    Cancel0.8%
    Flights931
  • Southwest Airlines
    On-time74%
    Medianon time
    p9040 min
    Cancel1.6%
    Flights1,917

Why flights run late

Delay causes

  • Airline30%
  • Weather2%
  • Air traffic (NAS)19%
  • Late aircraft49%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline16%
  • Weather76%
  • Air traffic (NAS)8%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 38 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 DEN → BWI

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

Best time of day

Mornings are the most reliable time of day to fly this route — 88% on time.

  • Mornings88% on time · p90 15 min · 3,279 flights
  • Overnights79% on time · p90 30 min · 872 flights
  • Middays75% on time · p90 30 min · 1,397 flights
  • Early mornings71% on time · p90 55 min · 129 flights · limited
  • Afternoons64% on time · p90 50 min · 1,144 flights
  • Evenings60% on time · p90 70 min · 2,273 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 71% to 79% on time.

  • Wednesdays79% on time · p90 30 min · 1,293 flights
  • Tuesdays77% on time · p90 40 min · 1,263 flights
  • Saturdays75% on time · p90 40 min · 1,167 flights
  • Fridays75% on time · p90 45 min · 1,381 flights
  • Thursdays74% on time · p90 45 min · 1,343 flights
  • Mondays73% on time · p90 40 min · 1,367 flights
  • Sundays71% on time · p90 45 min · 1,280 flights

Keep exploring

Related pages

Delay predictorfor this route→DEN airportDenver→BWI airportBaltimore→Southwest Airlinesairline profile→United Airlinesairline profile→Frontier Airlinesairline profile→Seasonal delay patternsguide→

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.