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Flight Reliability

UA 688 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 688 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

69%
Arrive within 15 minutes
23 min
Average arrival delay
2.7%
Cancelled
0 min
Median arrival delay

Based on 701 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon68%(97 flights)
  • Tue73%(96 flights)
  • Wed69%(97 flights)
  • Thu63%(100 flights)
  • Fri68%(95 flights)
  • Sat79%(97 flights)
  • Sun61%(98 flights)
On-time by departure window
  • 6–9 AM87%(196 flights)
  • 9 AM–12 PM81%(72 flights)
  • 12–3 PM46%(24 flights)
  • 3–6 PM61%(352 flights)
  • 6–9 PM42%(36 flights)
On-time trend by month
80%
May

Jun 42% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202542%64
July 202557%86
August 202579%62
September 202546%41
October 202572%61
November 202576%58
December 202575%57
January 202679%62
February 202672%36
March 202675%32
April 202675%60
May 202680%61
Departures on time
74%
Diverted
0.3%
Flights flown
680
Months covered
12

Keep nerding

Based on 701 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.