United Airlines 737 MAX 9
UANarrow-body jet
Fleet as reported in the 2025 annual filing · Registry & ages refreshed Aug 1, 2026
- Passengers flown a year
- 20.4M
- 4th-largest United Airlines sub-fleet
- Airframes in the filing
- 120
- Airports served
- 71
- Countries
- 12
- Departures a day
- 379
- Average age
- 3.5 yr
How United Airlines flies its 737 MAX 9
Filed traffic dataThe count above is the 737 MAX 9 airframes United Airlines owns (US DOT Form 41). This is how it actually flew them to 71 airports across 12 countries — the capacity and busiest routes filed with US DOT T-100 over the trailing 12 months.
Departures flown
138,399
May 2026
Seats flown
24,773,421
Passengers
20.4M
Load factor
84.1%
RPM ÷ ASM
Block hours
492,394
United Airlines's busiest 737 MAX 9 routes
Its busiest 737 MAX 9 routes over the trailing 12 months, by departures.
Houston – San Francisco (IAH–SFO)
3,330 departures · 511,332 passengers · 1,635 mi
85.8%
Load
Dulles – San Francisco (IAD–SFO)
2,732 departures · 412,986 passengers · 2,419 mi
84.5%
Load
Houston – Los Angeles (IAH–LAX)
2,549 departures · 402,850 passengers · 1,379 mi
88.3%
Load
Boston – San Francisco (BOS–SFO)
2,512 departures · 397,347 passengers · 2,704 mi
88.4%
Load
Cancún – Houston (CUN–IAH)
2,381 departures · 335,172 passengers · 811 mi
78.6%
Load
Newark – Santiago (EWR–STI)
2,064 departures · 331,305 passengers · 1,481 mi
89.7%
Load
1,978 departures · 299,388 passengers · 1,400 mi
84.6%
Load
1,921 departures · 297,926 passengers · 937 mi
86.6%
Load
1,919 departures · 291,573 passengers · 758 mi
84.9%
Load
Newark – Santo Domingo (EWR–SDQ)
1,839 departures · 289,881 passengers · 1,557 mi
88.1%
Load
Houston – San Salvador (IAH–SAL)
1,735 departures · 286,891 passengers · 1,207 mi
92.4%
Load
Dulles – Los Angeles (IAD–LAX)
1,704 departures · 262,048 passengers · 2,288 mi
85.9%
Load
Cancún – Newark (CUN–EWR)
1,692 departures · 255,825 passengers · 1,546 mi
84.5%
Load
Houston – San Juan (IAH–SJU)
1,684 departures · 274,951 passengers · 2,007 mi
91.2%
Load
Orlando – San Francisco (MCO–SFO)
1,582 departures · 241,020 passengers · 2,446 mi
85.1%
Load
The longest and shortest United Airlines 737 MAX 9 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
2,846 mi
6h 17m block · 191 departures · 84% load
Flown by United 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
137 mi
Grand Rapids – Chicago (GRR–ORD)
1h 12m block · 132 departures · 69% load
Flown by United Airlines.
Source: US DOT Bureau of Transportation Statistics, T-100 Segment. Data through May 2026.
Where United Airlines flies the 737 MAX 9 from
United Airlines flies its 737 MAX 9 from 71 US airports in 12 countries. The busiest, by departures:
- EWR
17,857 departures · 45 routes
13.8%
Share
- IAH
14,347 departures · 39 routes
11.1%
Share
- SFO
12,159 departures · 32 routes
9.4%
Share
- IAD
9,770 departures · 32 routes
7.5%
Share
- ORD
8,209 departures · 34 routes
6.3%
Share
- DEN
8,048 departures · 42 routes
6.2%
Share
- LAX
5,605 departures · 16 routes
4.3%
Share
- MCO
4,234 departures · 8 routes
3.3%
Share
- CUN
Cancún
3,916 departures · 7 routes
3.0%
Share
- BOS
3,766 departures · 7 routes
2.9%
Share
Where the 737 MAX 9 sits in United Airlines's fleet
The 737 MAX 9 is 11.2% of United Airlines's 1,076 tracked mainline aircraft.
Share of United Airlines's mainline fleet · each type a slice
Other United Airlines types
How old is the United Airlines 737 MAX 9 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 120 737 MAX 9 tail numbers in United Airlines's fleet →
Monthly United Airlines 737 MAX 9 capacity
Frequently asked
How many 737 MAX 9 does United Airlines have?
United Airlines operates about 120 737 MAX 9 aircraft — 120 in service and 0 stored in its latest US DOT fleet filing.
Where does United Airlines fly the 737 MAX 9?
United Airlines flies its 737 MAX 9 to about 71 US airports across 12 countries, its busiest route being IAH–SFO.
How old are United Airlines's 737 MAX 9?
United Airlines's 737 MAX 9 fleet averages about 3.5 yr, ranging from 0.7 yr to 8.4 yr.
What is the longest 737 MAX 9 route United Airlines flies?
The longest 737 MAX 9 route United Airlines flew over the trailing 12 months is ANC–ORD, about 2,846 miles.