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Flight WN1021

Southwest Airlines flight WN1021

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Alerts at this flight's airports

  • Watch Ground Delay Program SAN

    Ground Delay Program at San Diego International Airport (SAN): Average 37 minutes, up to 1 hour and 11 minutes

    Reason: airport volume

    Airport status

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  • Advisory Coastal Flood Statement FLL

    COASTAL FLOOD STATEMENT NOW IN EFFECT THROUGH THURSDAY EVENING

    Weather

  • 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

San Diego (SAN) to San Francisco (SFO)

Historically, this flight arrives 15+ minutes late 16% of the time, and when it is late the delay averages 65 minutes. It was cancelled 0.0% of the time.

On-time arrivals
84.5%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
65 min
Flights arriving 15+ minutes late
Flights tracked
58
Scheduled flights in the period

What caused the delays

  • Air traffic control & airport 58%
  • Airline (crew, maintenance, cleaning) 32%
  • Late-arriving aircraft 10%
  • Extreme weather 0%
  • Security 0%

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

Chicago (MDW) to San Diego (SAN)

Historically, this flight arrives 15+ minutes late 27% of the time, and when it is late the delay averages 49 minutes. It was cancelled 0.0% of the time.

On-time arrivals
73.2%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
49 min
Flights arriving 15+ minutes late
Flights tracked
41
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 39%
  • Air traffic control & airport 35%
  • Airline (crew, maintenance, cleaning) 24%
  • Security 2%
  • Extreme weather 0%

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

Panama City Beach (ECP) to Austin (AUS)

Historically, this flight arrives 15+ minutes late 21% of the time, and when it is late the delay averages 95 minutes. It was cancelled 0.0% of the time.

On-time arrivals
78.8%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
95 min
Flights arriving 15+ minutes late
Flights tracked
33
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 39%
  • Air traffic control & airport 35%
  • Airline (crew, maintenance, cleaning) 26%
  • Extreme weather 0%
  • Security 0%

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

Washington (DCA) to Houston (HOU)

Historically, this flight arrives 15+ minutes late 7% of the time, and when it is late the delay averages 53 minutes. It was cancelled 0.0% of the time.

On-time arrivals
92.6%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
53 min
Flights arriving 15+ minutes late
Flights tracked
27
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 57%
  • Airline (crew, maintenance, cleaning) 43%
  • Air traffic control & airport 0%
  • Extreme weather 0%
  • Security 0%

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

Baltimore (BWI) to Albany (ALB)

Historically, this flight arrives 15+ minutes late 8% of the time, and when it is late the delay averages 35 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
35 min
Flights arriving 15+ minutes late
Flights tracked
24
Scheduled flights in the period

What caused the delays

  • Airline (crew, maintenance, cleaning) 68%
  • Late-arriving aircraft 32%
  • Air traffic control & airport 0%
  • Extreme weather 0%
  • Security 0%

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

Orlando (MCO) to Chicago (MDW)

Historically, this flight arrives 15+ minutes late 33% of the time, and when it is late the delay averages 58 minutes. It was cancelled 4.5% of the time.

On-time arrivals
66.7%
Less than 15 minutes late
Cancelled
4.5%
Of scheduled flights
Average delay when late
58 min
Flights arriving 15+ minutes late
Flights tracked
22
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 48%
  • Airline (crew, maintenance, cleaning) 34%
  • Air traffic control & airport 17%
  • Extreme weather 0%
  • Security 0%

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

Boise (BOI) to Phoenix (PHX)

Only 16 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
16
Scheduled flights in the period

Phoenix (PHX) to Tampa (TPA)

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

On-time arrivals
43.8%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
68 min
Flights arriving 15+ minutes late
Flights tracked
16
Scheduled flights in the period

What caused the delays

  • Airline (crew, maintenance, cleaning) 76%
  • Late-arriving aircraft 18%
  • Air traffic control & airport 6%
  • Extreme weather 0%
  • Security 0%

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

Albany (ALB) to Nashville (BNA)

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

On-time arrivals
76.9%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
35 min
Flights arriving 15+ minutes late
Flights tracked
13
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 86%
  • Airline (crew, maintenance, cleaning) 13%
  • Air traffic control & airport 1%
  • Extreme weather 0%
  • Security 0%

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

Nashville (BNA) to Dallas (DAL)

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

On-time arrivals
69.2%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
38 min
Flights arriving 15+ minutes late
Flights tracked
13
Scheduled flights in the period

What caused the delays

  • Airline (crew, maintenance, cleaning) 63%
  • Late-arriving aircraft 32%
  • Air traffic control & airport 5%
  • Extreme weather 0%
  • Security 0%

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

Nashville (BNA) to Fort Lauderdale (FLL)

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

On-time arrivals
69.2%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
32 min
Flights arriving 15+ minutes late
Flights tracked
13
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 54%
  • Air traffic control & airport 26%
  • Airline (crew, maintenance, cleaning) 20%
  • Extreme weather 0%
  • Security 0%

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

Pittsburgh (PIT) to Orlando (MCO)

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

Austin (AUS) to New Orleans (MSY)

Only 8 flights on record, which is too few for reliable odds.

On-time arrivals
62.5%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
50 min
Flights arriving 15+ minutes late
Flights tracked
8
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 54%
  • Air traffic control & airport 27%
  • Airline (crew, maintenance, cleaning) 19%
  • Extreme weather 0%
  • Security 0%

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

Baltimore (BWI) to Tampa (TPA)

Only 4 flights on record, which is too few for reliable odds.

On-time arrivals
25.0%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
31 min
Flights arriving 15+ minutes late
Flights tracked
4
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 72%
  • Airline (crew, maintenance, cleaning) 25%
  • Air traffic control & airport 3%
  • Extreme weather 0%
  • Security 0%

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

Houston (HOU) to Midland (MAF)

Only 4 flights on record, which is too few for reliable odds.

On-time arrivals
75.0%
Less than 15 minutes late
Cancelled
0.0%
Of scheduled flights
Average delay when late
29 min
Flights arriving 15+ minutes late
Flights tracked
4
Scheduled flights in the period

What caused the delays

  • Late-arriving aircraft 69%
  • Airline (crew, maintenance, cleaning) 31%
  • Air traffic control & airport 0%
  • Extreme weather 0%
  • Security 0%

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

Chicago (MDW) to St Louis (STL)

Only 4 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
4
Scheduled flights in the period

St Louis (STL) to Raleigh/Durham (RDU)

Only 4 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
4
Scheduled flights in the period

Cleveland (CLE) to Chicago (MDW)

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

Denver (DEN) to Spokane (GEG)

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

New Orleans (MSY) to Dallas (DAL)

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

Providence/Warwick (PVD) to Chicago (MDW)

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
On-time arrivals by month
Sep 2025 Aug 2026
Show as table
MonthOn timeFlights
September 2025 90.0% 30
October 2025 50.0% 6
November 2025 81.0% 43
December 2025 67.6% 37
January 2026 83.9% 31
February 2026 82.1% 28
March 2026 69.2% 26
April 2026 92.9% 28
May 2026 77.4% 31
June 2026 57.1% 14
July 2026 53.8% 13
August 2026 100.0% 29

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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