Skip to content
WanderNerd
Check a flight

Flight Reliability

UA 1635 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1635 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

85%
Arrive within 15 minutes
3 min
Average arrival delay
0.5%
Cancelled
9 min early
Median arrival delay

Based on 440 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon89%(56 flights)
  • Tue80%(49 flights)
  • Wed83%(54 flights)
  • Thu84%(70 flights)
  • Fri86%(70 flights)
  • Sat86%(66 flights)
  • Sun83%(70 flights)
On-time by departure window
  • 6–9 AM—(9 flights)
  • 12–3 PM87%(342 flights)
  • 9 PM–12 AM74%(84 flights)
On-time trend by month
81%
May

Jun 77% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%34
July 202556%48
August 202586%42
September 202579%28
October 202597%31
November 202593%30
December 202594%31
January 202694%17
February 202691%23
March 202687%31
April 202698%51
May 202681%69
Departures on time
83%
Diverted
0.7%
Flights flown
435
Months covered
12

Keep nerding

Based on 440 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.