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Flight Reliability

UA 2603 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 2603 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
2.2%
Cancelled
6 min early
Median arrival delay

Based on 367 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon79%(52 flights)
  • Tue84%(51 flights)
  • Wed83%(54 flights)
  • Thu89%(54 flights)
  • Fri91%(56 flights)
  • Sat89%(35 flights)
  • Sun84%(55 flights)
On-time by departure window
  • 6–9 AM94%(124 flights)
  • 9 AM–12 PM86%(59 flights)
  • 12–3 PM69%(73 flights)
  • 6–9 PM91%(88 flights)
  • 9 PM–12 AM54%(13 flights)
On-time trend by month
93%
May

Jun 87% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202553%30
August 202576%41
September 202585%26
October 202589%27
November 202596%23
December 202581%31
February 202696%28
March 202690%57
April 202697%30
May 202693%29
Departures on time
84%
Diverted
0.5%
Flights flown
357
Months covered
12

Keep nerding

Based on 367 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.