UA2100

UA2100 (United Airlines) is a multi-stop service on 15 routes, busiest Newark to Chicago. Of 1,010 departures recorded from October 2024 to July 2026, 86.7% left on time, according to the US BTS.

Recorded departures by month

All legs under this number combined; see the leg table.

The most recent periods19 periods
PeriodDepartures 2025Departures 2026Change vs last year
January31310.0%
February2827▼ 3.6%
March4951▲ 4.1%
April5230▼ 42.3%
May4125▼ 39.0%
June6516▼ 75.4%
July9331▼ 66.7%
August80––
September60––
October62–in progress
November58––
December48––
Year to date (Jan–Jul)359211▼ 41.2%

according to the US BTS · October 2024 → July 2026

On-time departures by month

All legs combined

On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.

The most recent periods19 periods
PeriodOn time 2025On time 2026Change vs last year
January90.3%90.0%▼ 0.4%
February92.9%68.0%▼ 26.8%
March93.9%84.0%▼ 10.5%
April88.5%96.7%▲ 9.3%
May95.1%88.0%▼ 7.5%
June87.7%87.5%▼ 0.2%
July87.9%72.4%▼ 17.6%
August80.0%––
September91.5%––
October90.3%–in progress
November86.2%––
December85.4%––
Year-to-date average (Jan–Jul)90.9%83.8%▼ 7.8%

according to the US BTS · October 2024 → July 2026

Average departure delay by month

All legs combined

according to the US BTS · October 2024 → July 2026

Cancelled departures by month

All legs combined
The most recent periods19 periods
PeriodCancelled 2025Cancelled 2026Change vs last year
January01–
February02–
March01–
April00–
May00–
June00–
July220.0%
August0––
September1––
October0–in progress
November0––
December0––
Year to date (Jan–Jul)26▲ 200.0%

according to the US BTS · October 2024 → July 2026

This is not a forecast

This is a historical record of departures already flown, not a forecast for your flight.

This number flies several legs

Several legs: the headline figure averages all of them. See the leg table.

Cancellation share

  • Not cancelled 99.0% 1,000
  • Cancelled 1.0% 10

Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026

On time, leg by leg

  1. EWR–ORD486 90.7%
  2. ORD–LAS68 83.8%
  3. SLC–SFO54 81.5%
  4. ORD–SLC54 83.3%
  5. DEN–GTF53 92.5%
  6. ORD–RSW52 84.6%
  7. SEA–EWR51 79.6%
  8. ORD–STL40 90.0%

Departures within 15 minutes of schedule; small figure = departures recorded.

Legs flown under this number

10
Monthly figures
PeriodDepartures With departure delay recordedOn time Cancelled
October 2024 39 39 94.9% 0
November 2024 60 59 71.2% 1
December 2024 33 33 87.9% 0
January 2025 31 31 90.3% 0
February 2025 28 28 92.9% 0
March 2025 49 49 93.9% 0
April 2025 52 52 88.5% 0
May 2025 41 41 95.1% 0
June 2025 65 65 87.7% 0
July 2025 93 91 87.9% 2
August 2025 80 80 80.0% 0
September 2025 60 59 91.5% 1
October 2025 62 62 90.3% 0
November 2025 58 58 86.2% 0
December 2025 48 48 85.4% 0
January 2026 31 30 90.0% 1
February 2026 27 25 68.0% 2
March 2026 51 50 84.0% 1
April 2026 30 30 96.7% 0
May 2026 25 25 88.0% 0
June 2026 16 16 87.5% 0
July 2026 31 29 72.4% 2

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