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Flight Reliability

UA 5549 · United Airlines

RDD → San Francisco (RDD–SFO)100% of its flights flew this route. The rest (ABQ–IAH) are included in these numbers.

83
Pretty Reliable
WanderNerd Reliability Score
87%
Arrive within 15 minutes
23 min
Average arrival delay
1.2%
Cancelled
9 min early
Median arrival delay

Based on 330 historical flights. Data through May 2026.

What the data says

Wednesday is the weak spot.

UA 5549 arrived on time 91% of the time on Thursdays. On Wednesdays: 81%.

Better than the RDD–SFO route average.

UA 5549 arrived on time 87% of the time, versus 76% across the RDD–SFO route.

Better than the United Airlines network average.

UA 5549 arrived on time 87% of the time, versus 79% across the United Airlines network.

Ticking up lately.

UA 5549 arrived on time 89% of the time over the last three months in the data, compared with 83% in the three months before that.

The breakdown

On-time by weekday
  • Mon83%(47 flights)
  • Tue85%(47 flights)
  • Wed81%(47 flights)
  • Thu91%(46 flights)
  • Fri87%(47 flights)
  • Sat88%(48 flights)
  • Sun91%(44 flights)
On-time by departure window
  • 3–6 AM87%(94 flights)
  • 6–9 AM86%(231 flights)
  • 12–3 PM—(1 flights)
On-time trend by month
84%
May

Jun 93% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%30
July 202597%30
August 202581%31
September 202586%22
October 202580%10
November 202580%30
December 202570%27
January 202696%28
February 202681%26
March 202690%31
April 202693%30
May 202684%31
Departures on time
88%
Diverted
0%
Flights flown
326
Months covered
12

Same route, other flights

Keep nerding

Based on 330 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.