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Flight Reliability

UA 5720 · United Airlines

San Francisco → Boise (SFO–BOI)85% of its flights flew this route. The rest (SFO–OMA, ORD–ABE) are included in these numbers.

84
Pretty Reliable
WanderNerd Reliability Score
77%
Arrive within 15 minutes
8 min
Average arrival delay
0.3%
Cancelled
6 min early
Median arrival delay

Based on 325 historical flights. Data through May 2026.

What the data says

Mornings have a slight edge.

Departures between 6–9 AM arrived on time 82% of the time, against 77% between 3–6 PM.

Skip Monday if you can.

UA 5720 arrived on time 85% of the time on Tuesdays. On Mondays: 71%.

It basically never cancels.

Out of 325 scheduled flights, only 0.3% were cancelled.

Ticking up lately.

UA 5720 arrived on time 77% of the time over the last three months in the data, compared with 74% in the three months before that.

The breakdown

On-time by weekday
  • Mon71%(49 flights)
  • Tue85%(40 flights)
  • Wed80%(49 flights)
  • Thu76%(49 flights)
  • Fri75%(48 flights)
  • Sat75%(40 flights)
  • Sun78%(49 flights)
On-time by departure window
  • 6–9 AM82%(11 flights)
  • 3–6 PM77%(313 flights)
On-time trend by month
72%
May

Jun 87% → May 72% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202567%30
August 202577%26
September 202578%23
October 202581%31
November 202577%30
December 202565%31
January 202684%31
February 202673%11
March 202674%27
April 202686%29
May 202672%25
Departures on time
82%
Diverted
0%
Flights flown
324
Months covered
12

Same route, other flights

Keep nerding

Based on 325 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.