Skip to content
FriendlySkies Review
Menu

Flight UA2100

United Airlines flight UA2100

Read United Airlines reviews →

Looking for UA2100 in the air…

  • Advisory Coastal Flood Advisory OAK, SFO, SQL, STS

    COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 1 PM PST MONDAY

    Weather

Newark (EWR) to Chicago (ORD)

Historically, this flight arrives 15+ minutes late 16% of the time, and when it is late the delay averages 76 minutes. It was cancelled 1.2% of the time.

On-time arrivals
83.6%
Less than 15 minutes late
Cancelled
1.2%
Of scheduled flights
Average delay when late
76 min
Flights arriving 15+ minutes late
Flights tracked
162
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 53%
  • Airline (crew, maintenance, cleaning) 27%
  • Extreme weather 11%
  • Late-arriving aircraft 9%
  • Security 0%

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

Seattle (SEA) to Newark (EWR)

Historically, this flight arrives 15+ minutes late 19% of the time, and when it is late the delay averages 111 minutes. It was cancelled 3.3% of the time.

On-time arrivals
81.0%
Less than 15 minutes late
Cancelled
3.3%
Of scheduled flights
Average delay when late
111 min
Flights arriving 15+ minutes late
Flights tracked
61
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 66%
  • Air traffic control & airport 23%
  • Airline (crew, maintenance, cleaning) 11%
  • Extreme weather 0%
  • Security 0%

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

Chicago (ORD) to Las Vegas (LAS)

Historically, this flight arrives 15+ minutes late 13% of the time, and when it is late the delay averages 64 minutes. It was cancelled 0.0% of the time.

On-time arrivals
87.3%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
64 min
Flights arriving 15+ minutes late
Flights tracked
55
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 52%
  • Airline (crew, maintenance, cleaning) 33%
  • Air traffic control & airport 15%
  • Extreme weather 0%
  • Security 0%

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

Denver (DEN) to Great Falls (GTF)

Historically, this flight arrives 15+ minutes late 13% of the time, and when it is late the delay averages 50 minutes. It was cancelled 0.0% of the time.

On-time arrivals
86.8%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
50 min
Flights arriving 15+ minutes late
Flights tracked
53
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 42%
  • Late-arriving aircraft 32%
  • Airline (crew, maintenance, cleaning) 26%
  • Extreme weather 0%
  • Security 0%

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

Chicago (ORD) to Fort Myers (RSW)

Historically, this flight arrives 15+ minutes late 21% of the time, and when it is late the delay averages 49 minutes. It was cancelled 0.0% of the time.

On-time arrivals
78.8%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
49 min
Flights arriving 15+ minutes late
Flights tracked
52
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 38%
  • Airline (crew, maintenance, cleaning) 37%
  • Late-arriving aircraft 16%
  • Extreme weather 9%
  • Security 0%

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

Orlando (MCO) to Dulles (IAD)

Historically, this flight arrives 15+ minutes late 22% of the time, and when it is late the delay averages 202 minutes. It was cancelled 4.2% of the time.

On-time arrivals
78.3%
Less than 15 minutes late
Cancelled
4.2%
Of scheduled flights
Average delay when late
202 min
Flights arriving 15+ minutes late
Flights tracked
24
Scheduled flights in the period

What caused the delays

  • Airline (crew, maintenance, cleaning) 52%
  • Late-arriving aircraft 47%
  • Air traffic control & airport 1%
  • Extreme weather 0%
  • Security 0%

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

Newark (EWR) to Portland (PWM)

Historically, this flight arrives 15+ minutes late 21% of the time, and when it is late the delay averages 87 minutes. It was cancelled 9.5% of the time.

On-time arrivals
78.9%
Less than 15 minutes late
Cancelled
9.5%
Of scheduled flights
Average delay when late
87 min
Flights arriving 15+ minutes late
Flights tracked
21
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 83%
  • Airline (crew, maintenance, cleaning) 17%
  • Air traffic control & airport 0%
  • Extreme weather 0%
  • Security 0%

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

Phoenix (PHX) to San Francisco (SFO)

Historically, this flight arrives 15+ minutes late 62% of the time, and when it is late the delay averages 61 minutes. It was cancelled 0.0% of the time.

On-time arrivals
38.1%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
61 min
Flights arriving 15+ minutes late
Flights tracked
21
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 53%
  • Airline (crew, maintenance, cleaning) 29%
  • Late-arriving aircraft 18%
  • Extreme weather 0%
  • Security 0%

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

San Francisco (SFO) to Kalispell (FCA)

Historically, this flight arrives 15+ minutes late 57% of the time, and when it is late the delay averages 90 minutes. It was cancelled 0.0% of the time.

On-time arrivals
42.9%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
90 min
Flights arriving 15+ minutes late
Flights tracked
21
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 72%
  • Airline (crew, maintenance, cleaning) 16%
  • Air traffic control & airport 12%
  • Extreme weather 0%
  • Security 0%

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

Dulles (IAD) to Los Angeles (LAX)

Historically, this flight arrives 15+ minutes late 5% of the time, and when it is late the delay averages 358 minutes. It was cancelled 0.0% of the time.

On-time arrivals
95.0%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
358 min
Flights arriving 15+ minutes late
Flights tracked
20
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 95%
  • Late-arriving aircraft 5%
  • Airline (crew, maintenance, cleaning) 0%
  • Extreme weather 0%
  • Security 0%

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

Chicago (ORD) to Denver (DEN)

Only 1 flight on record, which is too few for reliable odds.

On-time arrivals
100.0%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
—
Flights arriving 15+ minutes late
Flights tracked
1
Scheduled flights in the period

In the news

More headlines →

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 94.9% 60
October 2025 74.2% 62
November 2025 79.3% 58
December 2025 80.9% 48
January 2026 86.7% 31
February 2026 84.0% 27
March 2026 88.0% 51
April 2026 93.3% 30
May 2026 80.0% 25
June 2026 93.3% 16
July 2026 79.3% 31
August 2026 44.2% 52

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

Latest airport & airline headlines

More headlines →

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