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Flight Reliability

UA 5217 · United Airlines

Spokane → San Francisco (GEG–SFO)89% of its flights flew this route. The rest (DEN–AUS, ORD–GRR) are included in these numbers.

88
Pretty Reliable
WanderNerd Reliability Score
83%
Arrive within 15 minutes
9 min
Average arrival delay
0%
Cancelled
11 min early
Median arrival delay

Based on 354 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

UA 5217 departing between 3–6 PM arrived on time 85% of the time, versus 72% between 6–9 PM.

Saturday is the weak spot.

UA 5217 arrived on time 87% of the time on Tuesdays. On Saturdays: 79%.

Better than the GEG–SFO route average.

UA 5217 arrived on time 83% of the time, versus 76% across the GEG–SFO route.

A bit ahead of the United Airlines network.

UA 5217 arrived on time 83% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon82%(50 flights)
  • Tue87%(52 flights)
  • Wed81%(52 flights)
  • Thu82%(49 flights)
  • Fri82%(51 flights)
  • Sat79%(47 flights)
  • Sun86%(51 flights)
On-time by departure window
  • 9 AM–12 PM—(4 flights)
  • 12–3 PM83%(251 flights)
  • 3–6 PM85%(79 flights)
  • 6–9 PM72%(18 flights)
On-time trend by month
83%
May

Jun 86% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%28
July 202590%31
August 202589%28
September 202593%30
October 202584%31
November 202572%29
December 202587%31
January 202672%29
February 202671%28
March 202687%31
April 202673%26
May 202683%30
Departures on time
80%
Diverted
0.6%
Flights flown
352
Months covered
12

Same route, other flights

Keep nerding

Based on 354 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.