OnTimeStats

Historical on-time performance

San Diego to Baltimore

2,295 miData through May 2026Source: US DOT · BTS

Flights on SAN–BWI arrive on time 79% of the time over the last 12 months.

On-time rate79%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled1.3%of scheduled flights

based on 1,124 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time79%
    Medianon time
    p9030 min
    Cancel1.3%
    Flights1,124

Why flights run late

Delay causes

  • Airline27%
  • Weather0%
  • Air traffic (NAS)21%
  • Late aircraft52%
  • Security1%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline27%
  • Weather67%
  • Air traffic (NAS)7%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 15 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 SAN → BWI

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 66% to 89% on time.

  • Overnights89% on time · p90 15 min · 452 flights
  • Mornings89% on time · p90 15 min · 1,017 flights
  • Evenings79% on time · p90 30 min · 114 flights · limited
  • Afternoons71% on time · p90 45 min · 520 flights
  • Middays66% on time · p90 50 min · 805 flights

Best day of week

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

  • Saturdays85% on time · p90 20 min · 348 flights
  • Tuesdays84% on time · p90 20 min · 425 flights
  • Wednesdays79% on time · p90 25 min · 422 flights
  • Mondays78% on time · p90 35 min · 441 flights
  • Fridays77% on time · p90 40 min · 445 flights
  • Thursdays76% on time · p90 35 min · 440 flights
  • Sundays75% on time · p90 40 min · 387 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.