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Flight Reliability

UA 5635 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 5635 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

75%
Arrive within 15 minutes
21 min
Average arrival delay
2.2%
Cancelled
2 min early
Median arrival delay

Based on 278 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon71%(42 flights)
  • Tue80%(35 flights)
  • Wed75%(32 flights)
  • Thu72%(43 flights)
  • Fri81%(43 flights)
  • Sat73%(33 flights)
  • Sun74%(43 flights)
On-time by departure window
  • 3–6 AM90%(10 flights)
  • 6–9 AM89%(98 flights)
  • 9 AM–12 PM80%(15 flights)
  • 12–3 PM67%(46 flights)
  • 3–6 PM63%(100 flights)
  • 6–9 PM—(2 flights)
On-time trend by month
85%
May

Jul 36% → May 85% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
July 202536%11
August 202587%15
September 202564%28
October 202578%27
November 202586%29
December 202566%29
January 202691%22
February 202683%24
March 202663%27
April 202683%29
May 202685%26
Departures on time
77%
Diverted
0.4%
Flights flown
271
Months covered
12

Keep nerding

Based on 278 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.