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Route Reliability

Baltimore → San Francisco

BWI–SFO · 2,457 miles · Baltimore/Washington International Thurgood Marshall Airport to San Francisco International Airport

78
Usually Fine
WanderNerd Reliability Score
75%
Arrive within 15 minutes
7 min
Average arrival delay
0.9%
Cancelled
1,113
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.United Airlines80%752 flights
  2. 2.Southwest Airlines64%361 flights

What the data says

Morning-you made the right choice.

BWI–SFO flights departing between 6–9 AM arrived on time 88% of the time, versus 62% between 6–9 PM.

Skip Wednesday if you can.

BWI–SFO flights arrived on time 82% of the time on Saturdays. On Wednesdays: 71%.

United Airlines has a clear lead on this route.

United Airlines arrived on time 80% of the time on this route; Southwest Airlines managed 64%.

Slipping a little lately.

BWI–SFO flights arrived on time 69% of the time over the last three months in the data, compared with 73% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon76%(166 flights)
  • Tue74%(141 flights)
  • Wed71%(139 flights)
  • Thu76%(169 flights)
  • Fri74%(170 flights)
  • Sat82%(151 flights)
  • Sun72%(163 flights)
On-time by departure window
  • 6–9 AM88%(402 flights)
  • 9 AM–12 PM84%(151 flights)
  • 12–3 PM66%(58 flights)
  • 3–6 PM64%(90 flights)
  • 6–9 PM62%(398 flights)
On-time trend by month
58%
May

Jun 75% → May 58% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202575%109
July 202574%114
August 202577%103
September 202577%85
October 202586%106
November 202581%80
December 202566%84
January 202681%83
February 202673%75
March 202684%88
April 202665%86
May 202658%86

Same trip, other airports

Keep nerding

Based on 1,113 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.