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Flight UA1015

United Airlines flight UA1015

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

    COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 1 PM PST MONDAY

    Weather

Boston (BOS) to Chicago (ORD)

Historically, this flight arrives 15+ minutes late 50% of the time, and when it is late the delay averages 89 minutes. It was cancelled 4.3% of the time.

On-time arrivals
50.3%
Less than 15 minutes late
Cancelled
4.3%
Of scheduled flights
Average delay when late
89 min
Flights arriving 15+ minutes late
Flights tracked
305
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 55%
  • Air traffic control & airport 34%
  • Airline (crew, maintenance, cleaning) 10%
  • Extreme weather 1%
  • Security 0%

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

San Francisco (SFO) to Boston (BOS)

Historically, this flight arrives 15+ minutes late 6% of the time, and when it is late the delay averages 52 minutes. It was cancelled 1.2% of the time.

On-time arrivals
93.9%
Less than 15 minutes late
Cancelled
1.2%
Of scheduled flights
Average delay when late
52 min
Flights arriving 15+ minutes late
Flights tracked
83
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 83%
  • Late-arriving aircraft 12%
  • Airline (crew, maintenance, cleaning) 5%
  • Extreme weather 0%
  • Security 0%

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

Chicago (ORD) to Dulles (IAD)

Historically, this flight arrives 15+ minutes late 23% of the time, and when it is late the delay averages 78 minutes. It was cancelled 0.0% of the time.

On-time arrivals
77.1%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
78 min
Flights arriving 15+ minutes late
Flights tracked
35
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 59%
  • Airline (crew, maintenance, cleaning) 36%
  • Air traffic control & airport 4%
  • Extreme weather 0%
  • Security 0%

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

Chicago (ORD) to Denver (DEN)

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

On-time arrivals
60.0%
Less than 15 minutes late
Cancelled
6.2%
Of scheduled flights
Average delay when late
60 min
Flights arriving 15+ minutes late
Flights tracked
16
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 61%
  • Air traffic control & airport 20%
  • Airline (crew, maintenance, cleaning) 12%
  • Extreme weather 6%
  • Security 0%

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

Fort Myers (RSW) to San Francisco (SFO)

Only 11 flights on record, which is too few for reliable odds.

On-time arrivals
72.7%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
32 min
Flights arriving 15+ minutes late
Flights tracked
11
Scheduled flights in the period

What caused the delays

  • Airline (crew, maintenance, cleaning) 59%
  • Air traffic control & airport 26%
  • Late-arriving aircraft 16%
  • Extreme weather 0%
  • Security 0%

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

Tucson (TUS) to Houston (IAH)

Only 9 flights on record, which is too few for reliable odds.

On-time arrivals
77.8%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
27 min
Flights arriving 15+ minutes late
Flights tracked
9
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 70%
  • Airline (crew, maintenance, cleaning) 30%
  • Late-arriving aircraft 0%
  • Extreme weather 0%
  • Security 0%

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

Sacramento (SMF) to Newark (EWR)

Only 5 flights 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
5
Scheduled flights in the period

Portland (PWM) to Dulles (IAD)

Only 3 flights 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
3
Scheduled flights in the period

Chicago (ORD) to Des Moines (DSM)

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

Chicago (ORD) to Houston (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

Chicago (ORD) to San Antonio (SAT)

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

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

What caused the delays

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

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

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On-time arrivals by month
Sep 2025 Aug 2026
Show as table
MonthOn timeFlights
September 2025 53.8% 40
October 2025 16.7% 31
November 2025 57.7% 29
December 2025 71.0% 31
January 2026 57.7% 27
February 2026 66.7% 19
March 2026 58.8% 19
April 2026 73.3% 47
May 2026 78.8% 52
June 2026 72.3% 84
July 2026 63.3% 52
August 2026 51.3% 39

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.