What type of aircraft is N8515X?

N8515X is a Boeing 737-800 with 175 seats, according to the FAA aircraft register.

Which airline flies N8515X?

Southwest Airlines (WN) flew N8515X most recently, according to US Department of Transportation flight records for July 2026.

Where does N8515X fly?

Its most frequent route in the last 12 months was Milwaukee to Denver (4 flights). It flew 1,685 flights in total, about 140 a month.

N8515X was built in 2016, so it is 10 years old.

Is N8515X usually on time?

75% 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

N8515X

Boeing 737-800, Southwest Airlines

N8515X is a Boeing 737-800 flown by Southwest Airlines, built in 2016. From August 2025 to July 2026 it flew 1,685 flights, most often Milwaukee to Denver, and 75% arrived within 15 minutes of schedule.

1,685

flights in 12 months

75%

on time (within 15 min)

airports

10 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 N8515X flies

Milwaukee to DenverMKE to DEN4 flights
Las Vegas to Long BeachLAS to LGB4 flights
Denver to HoustonDEN to HOU4 flights
St. Louis to DenverSTL to DEN4 flights
Denver to ChicagoDEN to MDW3 flights
Los Angeles to HoustonLAX to HOU3 flights
Chicago to DallasMDW to DAL3 flights
Midland to DallasMAF to DAL3 flights
Denver to NashvilleDEN to BNA3 flights
Chicago to DenverMDW to DEN3 flights

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

Month by month

Share of N8515X 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	72%	2%	147
September 2025	79%	0.8%	132
October 2025	80%	0%	117
November 2025	83%	0%	143
December 2025	84%	1.1%	93
January 2026	77%	1.5%	135
February 2026	80%	0%	112
March 2026	75%	0.6%	160
April 2026	78%	1.9%	160
May 2026	71%	0%	157
June 2026	61%	0.6%	164
July 2026	69%	3.6%	165

Questions and answers

What type of aircraft is N8515X?: N8515X is a Boeing 737-800 with 175 seats, according to the FAA aircraft register.
Which airline flies N8515X?: Southwest Airlines (WN) flew N8515X most recently, according to US Department of Transportation flight records for July 2026.
Where does N8515X fly?: Its most frequent route in the last 12 months was Milwaukee to Denver (4 flights). It flew 1,685 flights in total, about 140 a month.
How old is N8515X?: N8515X was built in 2016, so it is 10 years old.
Is N8515X usually on time?: 75% 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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