What type of aircraft is N8321D?

N8321D is a Boeing 737-8H4 with 143 seats, according to the FAA aircraft register.

Which airline flies N8321D?

Southwest Airlines (WN) flew N8321D most recently, according to US Department of Transportation flight records for July 2026.

Where does N8321D fly?

Its most frequent route in the last 12 months was Las Vegas to Denver (7 flights). It flew 1,692 flights in total, about 141 a month.

N8321D was built in 2012, so it is 14 years old.

Is N8321D usually on time?

78% of its flights from August 2025 to July 2026 arrived within 15 minutes of schedule. Punctuality depends far more on the route and the airline's day than on the aircraft itself.

US aircraft · WN

N8321D

Boeing 737-8H4, Southwest Airlines

N8321D is a Boeing 737-8H4 flown by Southwest Airlines, built in 2012. From August 2025 to July 2026 it flew 1,692 flights, most often Las Vegas to Denver, and 78% arrived within 15 minutes of schedule.

1,692

flights in 12 months

78%

on time (within 15 min)

airports

14 yr

age

August 2025 to July 2026. Flights from US Bureau of Transportation Statistics on-time records (public domain); aircraft details from the FAA aircraft register.

Where N8321D flies

Las Vegas to DenverLAS to DEN7 flights
Chicago to PhoenixMDW to PHX6 flights
Denver to DallasDEN to DAL6 flights
Orlando to San JuanMCO to SJU6 flights
Washington to ChicagoDCA to MDW5 flights
San Juan to OrlandoSJU to MCO5 flights
Las Vegas to St. LouisLAS to STL4 flights
Baltimore to Fort LauderdaleBWI to FLL4 flights
Honolulu to HiloHNL to ITO4 flights
Hilo to HonoluluITO to HNL4 flights

Its most frequent routes over the period. Each links to that route's punctuality page.

Month by month

Share of N8321D flights arriving within 15 minutes of schedule, by month. Green is the best month, orange the worst.

See the figures

Month	On time	Cancelled	Flights
August 2025	73%	0.8%	132
September 2025	85%	0%	150
October 2025	82%	0%	160
November 2025	85%	4.5%	133
December 2025	70%	2.2%	134
January 2026	86%	0%	123
February 2026	81%	0%	140
March 2026	67%	1.4%	142
April 2026	74%	0%	145
May 2026	77%	1.3%	151
June 2026	75%	0.7%	137
July 2026	77%	2.1%	145

Questions and answers

What type of aircraft is N8321D?: N8321D is a Boeing 737-8H4 with 143 seats, according to the FAA aircraft register.
Which airline flies N8321D?: Southwest Airlines (WN) flew N8321D most recently, according to US Department of Transportation flight records for July 2026.
Where does N8321D fly?: Its most frequent route in the last 12 months was Las Vegas to Denver (7 flights). It flew 1,692 flights in total, about 141 a month.
How old is N8321D?: N8321D was built in 2012, so it is 14 years old.
Is N8321D usually on time?: 78% of its flights from August 2025 to July 2026 arrived within 15 minutes of schedule. Punctuality depends far more on the route and the airline's day than on the aircraft itself.

See how Southwest Airlines compares with every other US airline.

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