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Flight Reliability

UA 5398 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 5398 moved between routes during this period. Numbers below combine all of them, so treat them as background, not a verdict. For a cleaner answer, check the route you are actually flying.

Combined across all its routes

86%
Arrive within 15 minutes
0 min
Average arrival delay
0.9%
Cancelled
9 min early
Median arrival delay

Based on 349 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon87%(47 flights)
  • Tue96%(51 flights)
  • Wed86%(51 flights)
  • Thu82%(49 flights)
  • Fri82%(51 flights)
  • Sat78%(41 flights)
  • Sun87%(53 flights)
On-time by departure window
  • 6–9 AM80%(25 flights)
  • 9 AM–12 PM81%(21 flights)
  • 12–3 PM—(4 flights)
  • 3–6 PM69%(68 flights)
  • 6–9 PM92%(225 flights)
On-time trend by month
71%
May

Jun 96% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202596%28
July 202593%29
August 202581%31
September 202597%29
October 202596%27
November 202589%28
December 202581%26
January 202687%31
February 202693%28
March 202690%29
April 202655%29
May 202671%28
Departures on time
85%
Diverted
0.9%
Flights flown
343
Months covered
12

Keep nerding

Based on 349 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.