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Flight UA434

United Airlines flight UA434

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  • Advisory Airport Closure SNA

    Airport Closure at John Wayne Orange County International Airport (SNA): Reopens Nov 08 at 14:15 UTC.

    Airport status

  • Advisory Coastal Flood Advisory CLD, SAN, SNA

    COASTAL FLOOD ADVISORY IN EFFECT FROM 4 AM FRIDAY TO NOON PST TUESDAY

    Weather

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

    COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 1 PM PST MONDAY

    Weather

Houston (IAH) to Los Angeles (LAX)

Historically, this flight arrives 15+ minutes late 21% of the time, and when it is late the delay averages 54 minutes. It was cancelled 1.9% of the time.

On-time arrivals
79.2%
Less than 15 minutes late
Cancelled
1.9%
Of scheduled flights
Average delay when late
54 min
Flights arriving 15+ minutes late
Flights tracked
108
Scheduled flights in the period

What caused the delays

  • Airline (crew, maintenance, cleaning) 30%
  • Air traffic control & airport 28%
  • Late-arriving aircraft 22%
  • Extreme weather 21%
  • Security 0%

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

Newark (EWR) to Houston (IAH)

Historically, this flight arrives 15+ minutes late 21% of the time, and when it is late the delay averages 46 minutes. It was cancelled 2.6% of the time.

On-time arrivals
78.7%
Less than 15 minutes late
Cancelled
2.6%
Of scheduled flights
Average delay when late
46 min
Flights arriving 15+ minutes late
Flights tracked
77
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 48%
  • Airline (crew, maintenance, cleaning) 33%
  • Late-arriving aircraft 18%
  • Extreme weather 0%
  • Security 0%

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

Miami (MIA) to Newark (EWR)

Historically, this flight arrives 15+ minutes late 17% of the time, and when it is late the delay averages 50 minutes. It was cancelled 1.4% of the time.

On-time arrivals
83.3%
Less than 15 minutes late
Cancelled
1.4%
Of scheduled flights
Average delay when late
50 min
Flights arriving 15+ minutes late
Flights tracked
74
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 37%
  • Late-arriving aircraft 32%
  • Airline (crew, maintenance, cleaning) 31%
  • Extreme weather 0%
  • Security 0%

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

Charleston (CHS) to Houston (IAH)

Historically, this flight arrives 15+ minutes late 13% of the time, and when it is late the delay averages 71 minutes. It was cancelled 0.0% of the time.

On-time arrivals
87.0%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
71 min
Flights arriving 15+ minutes late
Flights tracked
69
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 50%
  • Airline (crew, maintenance, cleaning) 50%
  • Late-arriving aircraft 0%
  • Extreme weather 0%
  • Security 0%

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

Santa Ana (SNA) to Houston (IAH)

Historically, this flight arrives 15+ minutes late 5% of the time, and when it is late the delay averages 33 minutes. It was cancelled 0.0% of the time.

On-time arrivals
94.5%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
33 min
Flights arriving 15+ minutes late
Flights tracked
55
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 64%
  • Air traffic control & airport 21%
  • Airline (crew, maintenance, cleaning) 14%
  • Extreme weather 0%
  • Security 0%

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

New York (LGA) to Houston (IAH)

Historically, this flight arrives 15+ minutes late 54% of the time, and when it is late the delay averages 81 minutes. It was cancelled 2.8% of the time.

On-time arrivals
45.7%
Less than 15 minutes late
Cancelled
2.8%
Of scheduled flights
Average delay when late
81 min
Flights arriving 15+ minutes late
Flights tracked
36
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 60%
  • Air traffic control & airport 22%
  • Airline (crew, maintenance, cleaning) 18%
  • Extreme weather 0%
  • Security 0%

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

Charleston (CHS) to Chicago (ORD)

Historically, this flight arrives 15+ minutes late 10% of the time, and when it is late the delay averages 40 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
40 min
Flights arriving 15+ minutes late
Flights tracked
21
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 91%
  • Airline (crew, maintenance, cleaning) 9%
  • Late-arriving aircraft 0%
  • Extreme weather 0%
  • Security 0%

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

Raleigh/Durham (RDU) to Newark (EWR)

Only 19 flights on record, which is too few for reliable odds.

On-time arrivals
57.9%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
43 min
Flights arriving 15+ minutes late
Flights tracked
19
Scheduled flights in the period

What caused the delays

  • Airline (crew, maintenance, cleaning) 38%
  • Late-arriving aircraft 37%
  • Air traffic control & airport 24%
  • Extreme weather 0%
  • Security 0%

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

Boston (BOS) to Houston (IAH)

Only 16 flights on record, which is too few for reliable odds.

On-time arrivals
81.2%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
44 min
Flights arriving 15+ minutes late
Flights tracked
16
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 46%
  • Air traffic control & airport 44%
  • Extreme weather 10%
  • Airline (crew, maintenance, cleaning) 1%
  • Security 0%

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

San Jose (SJC) to Newark (EWR)

Only 2 flights on record, which is too few for reliable odds.

On-time arrivals
50.0%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
16 min
Flights arriving 15+ minutes late
Flights tracked
2
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 100%
  • Airline (crew, maintenance, cleaning) 0%
  • Late-arriving aircraft 0%
  • Extreme weather 0%
  • Security 0%

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

Minneapolis (MSP) to San Francisco (SFO)

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

PBI → IAH

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

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On-time arrivals by month
Sep 2025 Aug 2026
Show as table
MonthOn timeFlights
September 2025 90.0% 30
October 2025 86.1% 37
November 2025 61.0% 59
December 2025 74.6% 68
January 2026 82.5% 41
February 2026 71.0% 64
March 2026 78.9% 39
April 2026 93.1% 30
May 2026 93.3% 30
June 2026 84.6% 26
July 2026 88.0% 25
August 2026 90.0% 30

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.