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Flight DL1821

Delta Air Lines flight DL1821

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Looking for DL1821 in the air…

Detroit (DTW) to Portland (PWM)

Historically, this flight arrives 15+ minutes late 11% of the time, and when it is late the delay averages 52 minutes. It was cancelled 1.2% of the time.

On-time arrivals
89.3%
Less than 15 minutes late
Cancelled
1.2%
Of scheduled flights
Average delay when late
52 min
Flights arriving 15+ minutes late
Flights tracked
86
Scheduled flights in the period

What caused the delays

  • Airline (crew, maintenance, cleaning) 68%
  • Air traffic control & airport 23%
  • Late-arriving aircraft 9%
  • Extreme weather 0%
  • Security 0%

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

Portland (PWM) to Detroit (DTW)

Historically, this flight arrives 15+ minutes late 25% of the time, and when it is late the delay averages 93 minutes. It was cancelled 1.2% of the time.

On-time arrivals
75.3%
Less than 15 minutes late
Cancelled
1.2%
Of scheduled flights
Average delay when late
93 min
Flights arriving 15+ minutes late
Flights tracked
86
Scheduled flights in the period

What caused the delays

  • Airline (crew, maintenance, cleaning) 36%
  • Air traffic control & airport 33%
  • Late-arriving aircraft 31%
  • Extreme weather 0%
  • Security 0%

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

Atlanta (ATL) to Jackson (JAN)

Historically, this flight arrives 15+ minutes late 18% of the time, and when it is late the delay averages 71 minutes. It was cancelled 0.0% of the time.

On-time arrivals
81.8%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
71 min
Flights arriving 15+ minutes late
Flights tracked
22
Scheduled flights in the period

What caused the delays

  • Airline (crew, maintenance, cleaning) 85%
  • Late-arriving aircraft 11%
  • Air traffic control & airport 4%
  • Extreme weather 0%
  • Security 0%

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

Jackson (JAN) to Atlanta (ATL)

Historically, this flight arrives 15+ minutes late 14% of the time, and when it is late the delay averages 61 minutes. It was cancelled 0.0% of the time.

On-time arrivals
86.4%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
61 min
Flights arriving 15+ minutes late
Flights tracked
22
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 96%
  • Airline (crew, maintenance, cleaning) 4%
  • Air traffic control & airport 0%
  • Extreme weather 0%
  • Security 0%

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

Charlotte Amalie (STT) to Atlanta (ATL)

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

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On-time arrivals by month
Sep 2025 Aug 2026
Show as table
MonthOn timeFlights
September 2025 86.1% 36
October 2025 75.0% 8
November 2025 100.0% 3
December 2025 100.0% 2
June 2026 85.4% 48
July 2026 74.6% 62
August 2026 87.1% 62

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

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