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Flight DL1520

Delta Air Lines flight DL1520

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Looking for DL1520 in the air…

Miami (MIA) to New York (JFK)

Historically, this flight arrives 15+ minutes late 19% of the time, and when it is late the delay averages 62 minutes. It was cancelled 5.8% of the time.

On-time arrivals
81.5%
Less than 15 minutes late
Cancelled
5.8%
Of scheduled flights
Average delay when late
62 min
Flights arriving 15+ minutes late
Flights tracked
86
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 71%
  • Late-arriving aircraft 23%
  • Airline (crew, maintenance, cleaning) 5%
  • Extreme weather 1%
  • Security 0%

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

Phoenix (PHX) to Salt Lake City (SLC)

Historically, this flight arrives 15+ minutes late 21% of the time, and when it is late the delay averages 84 minutes. It was cancelled 1.3% of the time.

On-time arrivals
78.9%
Less than 15 minutes late
Cancelled
1.3%
Of scheduled flights
Average delay when late
84 min
Flights arriving 15+ minutes late
Flights tracked
77
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 89%
  • Airline (crew, maintenance, cleaning) 9%
  • Air traffic control & airport 1%
  • Extreme weather 1%
  • Security 0%

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

Portland (PDX) to Seattle (SEA)

Historically, this flight arrives 15+ minutes late 6% of the time, and when it is late the delay averages 38 minutes. It was cancelled 0.0% of the time.

On-time arrivals
94.4%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
38 min
Flights arriving 15+ minutes late
Flights tracked
36
Scheduled flights in the period

What caused the delays

  • Airline (crew, maintenance, cleaning) 98%
  • Air traffic control & airport 2%
  • Late-arriving aircraft 0%
  • Extreme weather 0%
  • Security 0%

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

Orlando (MCO) to Austin (AUS)

Historically, this flight arrives 15+ minutes late 19% of the time, and when it is late the delay averages 99 minutes. It was cancelled 0.0% of the time.

On-time arrivals
80.6%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
99 min
Flights arriving 15+ minutes late
Flights tracked
31
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 94%
  • Airline (crew, maintenance, cleaning) 5%
  • Late-arriving aircraft 1%
  • Extreme weather 0%
  • Security 0%

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

Atlanta (ATL) to Tallahassee (TLH)

Historically, this flight arrives 15+ minutes late 17% of the time, and when it is late the delay averages 66 minutes. It was cancelled 4.2% of the time.

On-time arrivals
82.6%
Less than 15 minutes late
Cancelled
4.2%
Of scheduled flights
Average delay when late
66 min
Flights arriving 15+ minutes late
Flights tracked
24
Scheduled flights in the period

What caused the delays

  • Airline (crew, maintenance, cleaning) 67%
  • Late-arriving aircraft 32%
  • Air traffic control & airport 1%
  • Extreme weather 0%
  • Security 0%

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

Phoenix (PHX) to Seattle (SEA)

Historically, this flight arrives 15+ minutes late 8% of the time, and when it is late the delay averages 41 minutes. It was cancelled 0.0% of the time.

On-time arrivals
91.7%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
41 min
Flights arriving 15+ minutes late
Flights tracked
24
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 97%
  • Airline (crew, maintenance, cleaning) 3%
  • Air traffic control & airport 0%
  • Extreme weather 0%
  • Security 0%

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

Seattle (SEA) to Phoenix (PHX)

Historically, this flight arrives 15+ minutes late 8% of the time, and when it is late the delay averages 74 minutes. It was cancelled 0.0% of the time.

On-time arrivals
91.7%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
74 min
Flights arriving 15+ minutes late
Flights tracked
24
Scheduled flights in the period

What caused the delays

  • Airline (crew, maintenance, cleaning) 75%
  • Air traffic control & airport 25%
  • Late-arriving aircraft 0%
  • Extreme weather 0%
  • Security 0%

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

Atlanta (ATL) to Memphis (MEM)

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

On-time arrivals
85.7%
Less than 15 minutes late
Cancelled
12.5%
Of scheduled flights
Average delay when late
62 min
Flights arriving 15+ minutes late
Flights tracked
16
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 82%
  • Airline (crew, maintenance, cleaning) 18%
  • Air traffic control & airport 0%
  • Extreme weather 0%
  • Security 0%

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

Atlanta (ATL) to Panama City Beach (ECP)

Only 13 flights on record, which is too few for reliable odds.

On-time arrivals
84.6%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
59 min
Flights arriving 15+ minutes late
Flights tracked
13
Scheduled flights in the period

What caused the delays

  • Extreme weather 84%
  • Airline (crew, maintenance, cleaning) 16%
  • Late-arriving aircraft 0%
  • Air traffic control & airport 0%
  • Security 0%

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

New York (LGA) to Boston (BOS)

Only 12 flights on record, which is too few for reliable odds.

On-time arrivals
91.7%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
50 min
Flights arriving 15+ minutes late
Flights tracked
12
Scheduled flights in the period

What caused the delays

  • Airline (crew, maintenance, cleaning) 72%
  • Air traffic control & airport 28%
  • Late-arriving aircraft 0%
  • Extreme weather 0%
  • Security 0%

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

Tallahassee (TLH) to Atlanta (ATL)

Only 12 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
12
Scheduled flights in the period

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On-time arrivals by month
Sep 2025 Aug 2026
Show as table
MonthOn timeFlights
September 2025 76.5% 17
October 2025 87.0% 23
November 2025 75.0% 20
December 2025 76.9% 29
January 2026 91.4% 36
February 2026 88.0% 50
March 2026 94.7% 38
April 2026 90.9% 22
May 2026 82.1% 28
June 2026 86.2% 30
July 2026 79.3% 31
August 2026 79.3% 31

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.