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Route Reliability

San Francisco → Baltimore

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

86
Pretty Reliable
WanderNerd Reliability Score
82%
Arrive within 15 minutes
0 min
Average arrival delay
0.6%
Cancelled
1,112
Flights in the data

Data through May 2026.

Who flies it best

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

  1. 1.United Airlines88%751 flights
  2. 2.Southwest Airlines70%361 flights

What the data says

Morning-you made the right choice.

SFO–BWI flights departing between 6–9 AM arrived on time 96% of the time, versus 78% between 12–3 PM.

Skip Monday if you can.

SFO–BWI flights arrived on time 88% of the time on Saturdays. On Mondays: 79%.

United Airlines has a clear lead on this route.

United Airlines arrived on time 88% of the time on this route; Southwest Airlines managed 70%.

Flights on this route

The breakdown

On-time by weekday
  • Mon79%(167 flights)
  • Tue87%(123 flights)
  • Wed81%(159 flights)
  • Thu80%(169 flights)
  • Fri82%(159 flights)
  • Sat88%(153 flights)
  • Sun80%(169 flights)
On-time by departure window
  • 6–9 AM96%(53 flights)
  • 9 AM–12 PM87%(285 flights)
  • 12–3 PM78%(36 flights)
  • 6–9 PM88%(16 flights)
  • 9 PM–12 AM79%(709 flights)
On-time trend by month
78%
May

Jun 77% → May 78% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%109
July 202576%110
August 202576%101
September 202576%86
October 202589%105
November 202585%80
December 202578%87
January 202690%81
February 202687%77
March 202693%90
April 202685%86
May 202678%87

Same trip, other airports

Keep nerding

Based on 1,112 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.