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Flight Reliability

UA 340 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 340 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

88%
Arrive within 15 minutes
0 min
Average arrival delay
1.6%
Cancelled
9 min early
Median arrival delay

Based on 367 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon94%(52 flights)
  • Tue83%(52 flights)
  • Wed89%(54 flights)
  • Thu84%(51 flights)
  • Fri96%(49 flights)
  • Sat84%(51 flights)
  • Sun88%(51 flights)
On-time by departure window
  • 3–6 AM92%(13 flights)
  • 6–9 AM87%(103 flights)
  • 9 AM–12 PM90%(228 flights)
  • 12–3 PM67%(15 flights)
  • 6–9 PM—(1 flights)
On-time trend by month
90%
May

Jun 74% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202574%27
July 202586%35
August 202583%29
September 202593%29
October 202594%31
November 202597%30
December 202590%31
January 202687%31
February 202689%27
March 202683%29
April 202693%30
May 202690%31
Departures on time
90%
Diverted
0.3%
Flights flown
360
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.