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Flight UA1535

United Airlines flight UA1535

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

    COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 1 PM PST MONDAY

    Weather

Dulles (IAD) to Houston (IAH)

Historically, this flight arrives 15+ minutes late 15% of the time, and when it is late the delay averages 90 minutes. It was cancelled 0.6% of the time.

On-time arrivals
85.1%
Less than 15 minutes late
Cancelled
0.6%
Of scheduled flights
Average delay when late
90 min
Flights arriving 15+ minutes late
Flights tracked
320
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 43%
  • Air traffic control & airport 29%
  • Airline (crew, maintenance, cleaning) 22%
  • Extreme weather 5%
  • Security 0%

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

Houston (IAH) to Dallas-Fort Worth (DFW)

Historically, this flight arrives 15+ minutes late 31% of the time, and when it is late the delay averages 89 minutes. It was cancelled 0.5% of the time.

On-time arrivals
68.7%
Less than 15 minutes late
Cancelled
0.5%
Of scheduled flights
Average delay when late
89 min
Flights arriving 15+ minutes late
Flights tracked
217
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 49%
  • Air traffic control & airport 30%
  • Airline (crew, maintenance, cleaning) 17%
  • Extreme weather 4%
  • Security 0%

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

Raleigh/Durham (RDU) to Dulles (IAD)

Historically, this flight arrives 15+ minutes late 10% of the time, and when it is late the delay averages 66 minutes. It was cancelled 0.6% of the time.

On-time arrivals
89.9%
Less than 15 minutes late
Cancelled
0.6%
Of scheduled flights
Average delay when late
66 min
Flights arriving 15+ minutes late
Flights tracked
180
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 59%
  • Airline (crew, maintenance, cleaning) 31%
  • Air traffic control & airport 10%
  • Extreme weather 0%
  • Security 0%

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

Houston (IAH) to San Francisco (SFO)

Historically, this flight arrives 15+ minutes late 26% of the time, and when it is late the delay averages 54 minutes. It was cancelled 0.0% of the time.

On-time arrivals
74.2%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
54 min
Flights arriving 15+ minutes late
Flights tracked
31
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 46%
  • Air traffic control & airport 34%
  • Airline (crew, maintenance, cleaning) 17%
  • Extreme weather 2%
  • Security 0%

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

San Francisco (SFO) to Los Angeles (LAX)

Historically, this flight arrives 15+ minutes late 32% of the time, and when it is late the delay averages 49 minutes. It was cancelled 0.0% of the time.

On-time arrivals
68.0%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
49 min
Flights arriving 15+ minutes late
Flights tracked
25
Scheduled flights in the period

What caused the delays

  • Airline (crew, maintenance, cleaning) 76%
  • Late-arriving aircraft 24%
  • Air traffic control & airport 1%
  • Extreme weather 0%
  • Security 0%

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

Houston (IAH) to New Orleans (MSY)

Historically, this flight arrives 15+ minutes late 10% of the time, and when it is late the delay averages 33 minutes. It was cancelled 0.0% of the time.

On-time arrivals
90.5%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
33 min
Flights arriving 15+ minutes late
Flights tracked
21
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 48%
  • Extreme weather 33%
  • Airline (crew, maintenance, cleaning) 19%
  • Late-arriving aircraft 0%
  • Security 0%

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

In the news

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On-time arrivals by month
Sep 2025 Aug 2026
Show as table
MonthOn timeFlights
September 2025 88.9% 27
October 2025 73.6% 87
November 2025 86.7% 30
December 2025 79.5% 44
January 2026 97.1% 36
February 2026 92.9% 28
March 2026 80.5% 85
April 2026 91.1% 90
May 2026 84.8% 93
June 2026 71.6% 90
July 2026 68.5% 93
August 2026 82.4% 91

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

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