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Route Reliability

San Diego → Baltimore

SAN–BWI · 2,295 miles · San Diego International Airport to Baltimore/Washington International Thurgood Marshall Airport

83
Pretty Reliable
WanderNerd Reliability Score
81%
Arrive within 15 minutes
1 min
Average arrival delay
1.3%
Cancelled
1,124
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 81% of the time across 1,124 flights. No comparison to make.

What the data says

The late departure is the smart one here.

SAN–BWI flights departing between 9 PM–12 AM arrived on time 92% of the time, versus 61% between 12–3 PM.

Thursdays have been rough.

SAN–BWI flights arrived on time 93% of the time on Saturdays and just 75% on Thursdays. That gap is worth planning around.

Recent months have been rougher.

SAN–BWI flights arrived on time 74% of the time over the last three months in the data, compared with 87% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon79%(174 flights)
  • Tue87%(159 flights)
  • Wed82%(153 flights)
  • Thu75%(174 flights)
  • Fri83%(174 flights)
  • Sat93%(116 flights)
  • Sun76%(155 flights)
On-time by departure window
  • 6–9 AM91%(328 flights)
  • 9 AM–12 PM75%(130 flights)
  • 12–3 PM61%(238 flights)
  • 3–6 PM65%(48 flights)
  • 6–9 PM87%(61 flights)
  • 9 PM–12 AM92%(300 flights)
On-time trend by month
76%
May

Jun 80% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202580%84
July 202575%87
August 202580%84
September 202590%81
October 202586%101
November 202587%96
December 202586%97
January 202692%88
February 202685%79
March 202674%100
April 202671%103
May 202676%105

Same trip, other airports

Keep nerding

Based on 1,124 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.