UA1991

UA1991 (United Airlines) is a multi-stop service on 10 routes, busiest Newark to Houston. Of 767 departures recorded from October 2024 to July 2026, 71.3% 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%
February2728▲ 3.7%
March31310.0%
April3029▼ 3.3%
May3122▼ 29.0%
June3430▼ 11.8%
July6230▼ 51.6%
August49––
September30––
October37–in progress
November60––
December48––
Year to date (Jan–Jul)246201▼ 18.3%

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
January76.7%76.7%0.0%
February96.3%89.3%▼ 7.3%
March80.7%72.4%▼ 10.2%
April73.3%79.3%▲ 8.2%
May74.2%77.3%▲ 4.2%
June55.9%86.2%▲ 54.3%
July51.9%70.4%▲ 35.7%
August72.9%––
September50.0%––
October69.4%–in progress
November69.5%––
December66.7%––
Year-to-date average (Jan–Jul)72.7%78.8%▲ 8.4%

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
January110.0%
February00–
March02–
April00–
May00–
June01–
July83▼ 62.5%
August1––
September0––
October1–in progress
November1––
December0––
Year to date (Jan–Jul)97▼ 22.2%

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 97.5% 748
  • Cancelled 2.5% 19

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

On time, leg by leg

  1. EWR–IAH391 72.3%
  2. DJT–EWR108 70.5%
  3. EWR–ATL103 76.8%
  4. RDU–EWR70 58.5%
  5. ORD–DTW44 73.8%

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

Legs flown under this number

5
Monthly figures
PeriodDepartures With departure delay recordedOn time Cancelled
October 2024 20 20 85.0% 0
November 2024 29 29 72.4% 0
December 2024 47 47 59.6% 0
January 2025 31 30 76.7% 1
February 2025 27 27 96.3% 0
March 2025 31 31 80.7% 0
April 2025 30 30 73.3% 0
May 2025 31 31 74.2% 0
June 2025 34 34 55.9% 0
July 2025 62 54 51.9% 8
August 2025 49 48 72.9% 1
September 2025 30 30 50.0% 0
October 2025 37 36 69.4% 1
November 2025 60 59 69.5% 1
December 2025 48 48 66.7% 0
January 2026 31 30 76.7% 1
February 2026 28 28 89.3% 0
March 2026 31 29 72.4% 2
April 2026 29 29 79.3% 0
May 2026 22 22 77.3% 0
June 2026 30 29 86.2% 1
July 2026 30 27 70.4% 3

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