Southwest Airlines 737-800
WNNarrow-body jet
Fleet as reported in the 2025 annual filing · Registry & ages refreshed Sep 1, 2026
- Passengers flown a year
- 43.7M
- 3rd-largest Southwest Airlines sub-fleet
- Airframes in the filing
- 198
- Airports served
- 101
- Countries
- 6
- Departures a day
- 925
- Average age
- 11.0 yr
How Southwest Airlines flies its 737-800
Filed traffic dataThe count above is the 737-800 airframes Southwest Airlines owns (US DOT Form 41). This is how it actually flew them to 101 airports across 6 countries — the capacity and busiest routes filed with US DOT T-100 over the trailing 12 months.
Departures flown
337,598
May 2026
Seats flown
59,079,650
Passengers
43.7M
Load factor
76.7%
RPM ÷ ASM
Block hours
770,024
Southwest Airlines's busiest 737-800 routes
Its busiest 737-800 routes over the trailing 12 months, by departures.
2,121 departures · 277,438 passengers · 602 mi
74.8%
Load
2,008 departures · 256,522 passengers · 787 mi
73.0%
Load
1,961 departures · 248,843 passengers · 879 mi
72.5%
Load
1,953 departures · 247,769 passengers · 651 mi
72.5%
Load
1,937 departures · 262,965 passengers · 1,067 mi
77.6%
Load
1,808 departures · 238,348 passengers · 628 mi
75.3%
Load
1,803 departures · 263,365 passengers · 1,444 mi
83.5%
Load
1,706 departures · 242,992 passengers · 990 mi
81.4%
Load
1,679 departures · 193,256 passengers · 255 mi
65.8%
Load
1,645 departures · 247,216 passengers · 1,521 mi
85.9%
Load
Orlando – San Juan (MCO–SJU)
1,611 departures · 257,301 passengers · 1,189 mi
91.3%
Load
Las Vegas – Sacramento (LAS–SMF)
1,546 departures · 210,766 passengers · 397 mi
77.9%
Load
1,543 departures · 218,448 passengers · 895 mi
80.9%
Load
1,518 departures · 200,921 passengers · 616 mi
75.6%
Load
1,507 departures · 199,520 passengers · 883 mi
75.6%
Load
The longest and shortest Southwest Airlines 737-800 flights
The two ends of the type's working envelope, from the routes it actually flew — not what the airframe is certified to do.
Longest route flown
2,457 mi
Baltimore – San Francisco (BWI–SFO)
5h 19m block · 344 departures · 82% load
Flown by Southwest Airlines. A long leg for a narrow-body twin — far enough from a diversion airport that the type carries an ETOPS rating.
Shortest route flown
73 mi
Colorado Springs – Denver (COS–DEN)
45m block · 500 departures · 70% load
Flown by Southwest Airlines. About 45m of block time, most of it connecting traffic feeding the hub.
Source: US DOT Bureau of Transportation Statistics, T-100 Segment. Data through May 2026.
Where Southwest Airlines flies the 737-800 from
Southwest Airlines flies its 737-800 from 101 US airports in 6 countries. The busiest, by departures:
- DEN
25,452 departures · 77 routes
7.8%
Share
- LAS
21,157 departures · 64 routes
6.5%
Share
- BWI
19,837 departures · 66 routes
6.1%
Share
- MDW
19,238 departures · 64 routes
5.9%
Share
- DAL
16,932 departures · 57 routes
5.2%
Share
- PHX
16,628 departures · 47 routes
5.1%
Share
- BNA
15,895 departures · 65 routes
4.9%
Share
- MCO
14,674 departures · 50 routes
4.5%
Share
- HOU
12,274 departures · 48 routes
3.8%
Share
- STL
10,847 departures · 45 routes
3.3%
Share
Where the 737-800 sits in Southwest Airlines's fleet
The 737-800 is 23.9% of Southwest Airlines's 858 tracked mainline aircraft.
Share of Southwest Airlines's mainline fleet · each type a slice
Other Southwest Airlines types
How old is the Southwest Airlines 737-800 fleet?
Age is measured from each airframe's delivery date — the FAA airworthiness date where available, otherwise the manufacturer's. Bars share a fixed scale across every fleet page, so two carriers can be compared directly.
See all 198 737-800 tail numbers in Southwest Airlines's fleet →
Monthly Southwest Airlines 737-800 capacity
Frequently asked
How many 737-800 does Southwest Airlines have?
Southwest Airlines operates about 198 737-800 aircraft — 198 in service and 0 stored in its latest US DOT fleet filing.
Where does Southwest Airlines fly the 737-800?
Southwest Airlines flies its 737-800 to about 101 US airports across 6 countries, its busiest route being DEN–PHX.
How old are Southwest Airlines's 737-800?
Southwest Airlines's 737-800 fleet averages about 11.0 yr, ranging from 8.0 yr to 14.5 yr.
What is the longest 737-800 route Southwest Airlines flies?
The longest 737-800 route Southwest Airlines flew over the trailing 12 months is BWI–SFO, about 2,457 miles.