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Flight Reliability

UA 1870 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1870 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

73%
Arrive within 15 minutes
12 min
Average arrival delay
0.7%
Cancelled
4 min early
Median arrival delay

Based on 543 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(78 flights)
  • Tue84%(79 flights)
  • Wed70%(77 flights)
  • Thu69%(75 flights)
  • Fri71%(76 flights)
  • Sat76%(74 flights)
  • Sun64%(80 flights)
On-time by departure window
  • 12–3 PM90%(19 flights)
  • 3–6 PM55%(11 flights)
  • 6–9 PM52%(179 flights)
  • 9 PM–12 AM84%(330 flights)
On-time trend by month
52%
May

Jun 60% → May 52% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%60
July 202569%61
August 202581%47
September 202570%30
October 202584%37
November 202569%58
December 202596%47
January 2026100%30
February 202696%28
March 202685%33
April 202652%60
May 202652%48
Departures on time
73%
Diverted
0%
Flights flown
539
Months covered
12

Keep nerding

Based on 543 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.