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Flight Reliability

UA 2664 · United Airlines

San Francisco → Baltimore (SFO–BWI)93% of its flights flew this route. The rest (FLL–DEN, DTW–SFO) are included in these numbers.

87
Pretty Reliable
WanderNerd Reliability Score
87%
Arrive within 15 minutes
4 min early
Average arrival delay
0.5%
Cancelled
7 min early
Median arrival delay

Based on 372 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

UA 2664 departing between 6–9 AM arrived on time 95% of the time, versus 68% between 3–6 PM.

Friday is doing you no favors.

UA 2664 arrived on time 96% of the time on Thursdays and just 81% on Fridays. That gap is worth planning around.

A bit ahead of the SFO–BWI route.

UA 2664 arrived on time 87% of the time, versus 82% across the SFO–BWI route.

Better than the United Airlines network average.

UA 2664 arrived on time 87% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon84%(51 flights)
  • Tue90%(49 flights)
  • Wed89%(52 flights)
  • Thu96%(53 flights)
  • Fri81%(53 flights)
  • Sat89%(52 flights)
  • Sun82%(54 flights)
On-time by departure window
  • 6–9 AM95%(60 flights)
  • 9 AM–12 PM87%(285 flights)
  • 3–6 PM68%(19 flights)
On-time trend by month
95%
May

Jun 83% → May 95% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%30
July 202565%26
August 202577%31
September 202579%29
October 202597%31
November 202597%30
December 202584%31
January 202683%30
February 202693%27
March 202694%31
April 202693%30
May 202695%38
Departures on time
85%
Diverted
1.6%
Flights flown
364
Months covered
12

Same route, other flights

Keep nerding

Based on 372 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.