What type of aircraft is N8639B?

N8639B is a Boeing 737-8H4 with 143 seats, according to the FAA aircraft register.

Which airline flies N8639B?

Southwest Airlines (WN) flew N8639B most recently, according to US Department of Transportation flight records for July 2026.

Where does N8639B fly?

Its most frequent route in the last 12 months was Las Vegas to Reno (4 flights). It flew 1,587 flights in total, about 132 a month.

N8639B was built in 2014, so it is 12 years old.

Is N8639B usually on time?

76% 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

N8639B

Boeing 737-8H4, Southwest Airlines

N8639B is a Boeing 737-8H4 flown by Southwest Airlines, built in 2014. From August 2025 to July 2026 it flew 1,587 flights, most often Las Vegas to Reno, and 76% arrived within 15 minutes of schedule.

1,587

flights in 12 months

76%

on time (within 15 min)

airports

12 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 N8639B flies

Las Vegas to RenoLAS to RNO4 flights
Orlando to ChicagoMCO to MDW4 flights
Denver to DallasDEN to DAL4 flights
Orlando to MilwaukeeMCO to MKE4 flights
Sacramento to San DiegoSMF to SAN3 flights
Dallas to NashvilleDAL to BNA3 flights
Las Vegas to DallasLAS to DAL3 flights
Baltimore to NashvilleBWI to BNA3 flights
Dallas to Kansas CityDAL to MCI3 flights
Boston to BaltimoreBOS to BWI3 flights

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

Month by month

Share of N8639B 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	79%	0.6%	162
September 2025	88%	0%	144
October 2025	79%	0%	150
November 2025	80%	2.7%	148
December 2025	77%	1.3%	154
January 2026	82%	2.5%	81
February 2026	87%	1.7%	117
March 2026	67%	0%	169
April 2026	70%	0%	47
May 2026	70%	0%	94
June 2026	66%	0.6%	163
July 2026	71%	2.5%	158

Questions and answers

What type of aircraft is N8639B?: N8639B is a Boeing 737-8H4 with 143 seats, according to the FAA aircraft register.
Which airline flies N8639B?: Southwest Airlines (WN) flew N8639B most recently, according to US Department of Transportation flight records for July 2026.
Where does N8639B fly?: Its most frequent route in the last 12 months was Las Vegas to Reno (4 flights). It flew 1,587 flights in total, about 132 a month.
How old is N8639B?: N8639B was built in 2014, so it is 12 years old.
Is N8639B usually on time?: 76% 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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