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Flight UA2021

United Airlines flight UA2021

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Looking for UA2021 in the air…

Dulles (IAD) to San Juan (SJU)

Historically, this flight arrives 15+ minutes late 15% of the time, and when it is late the delay averages 57 minutes. It was cancelled 0.6% of the time.

On-time arrivals
84.9%
Less than 15 minutes late
Cancelled
0.6%
Of scheduled flights
Average delay when late
57 min
Flights arriving 15+ minutes late
Flights tracked
347
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 58%
  • Late-arriving aircraft 16%
  • Airline (crew, maintenance, cleaning) 14%
  • Extreme weather 13%
  • Security 0%

Share of delay minutes airlines attributed to each cause (BTS).

In the news

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Headlines found by Google News; stories open on the publisher's site.

On-time arrivals by month
Sep 2025 Aug 2026
Show as table
MonthOn timeFlights
September 2025 76.9% 13
October 2025 93.5% 31
November 2025 86.7% 30
December 2025 80.6% 31
January 2026 82.8% 31
February 2026 88.9% 27
March 2026 90.3% 31
April 2026 90.0% 30
May 2026 100.0% 31
June 2026 90.0% 30
July 2026 54.8% 31
August 2026 80.6% 31

Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data

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Headlines found by Google News; stories open on the publisher's site.