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Flight Reliability

UA 5317 · United Airlines

ATW → Denver (ATW–DEN)97% of its flights flew this route. The rest (MBS–ORD, FWA–ORD) are included in these numbers.

85
Pretty Reliable
WanderNerd Reliability Score
81%
Arrive within 15 minutes
6 min
Average arrival delay
1.1%
Cancelled
8 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

The 9 AM–12 PM departure wins.

UA 5317 departing between 9 AM–12 PM arrived on time 90% of the time, versus 81% between 6–9 AM.

Wednesdays have been rough.

UA 5317 arrived on time 88% of the time on Saturdays and just 73% on Wednesdays. That gap is worth planning around.

A bit ahead of the ATW–DEN route.

UA 5317 arrived on time 81% of the time, versus 78% across the ATW–DEN route.

Trending in the right direction.

UA 5317 arrived on time 84% 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
  • Mon86%(51 flights)
  • Tue77%(51 flights)
  • Wed73%(52 flights)
  • Thu81%(52 flights)
  • Fri85%(52 flights)
  • Sat88%(51 flights)
  • Sun79%(52 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM81%(349 flights)
  • 9 AM–12 PM90%(10 flights)
  • 12–3 PM—(1 flights)
On-time trend by month
90%
May

Jun 83% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%30
July 202577%31
August 202584%31
September 202593%30
October 202581%31
November 202583%30
December 202568%31
January 202668%31
February 202685%27
March 202682%28
April 202680%30
May 202690%31
Departures on time
81%
Diverted
0%
Flights flown
361
Months covered
12

Same route, other flights

Keep nerding

Based on 365 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.