United Airlines 737 MAX 9
UANarrow-body jet
Fleet as reported in the 2025 annual filing · Registry & ages refreshed Oct 1, 2026
- Passengers flown a year
- 21.9M
- 4th-largest United Airlines sub-fleet
- Airframes in the filing
- 120
- Airports served
- 80
- Countries
- 15
- Departures a day
- 405
- Average age
- 3.7 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 80 airports across 15 countries — the capacity and busiest routes filed with US DOT T-100 over the trailing 12 months.
Departures flown
147,709
July 2026
Seats flown
26,439,911
Passengers
21.9M
Load factor
84.4%
RPM ÷ ASM
Block hours
524,909
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)
3,511 departures · 540,510 passengers · 1,635 mi
86.0%
Load
Houston – Los Angeles (IAH–LAX)
2,782 departures · 441,449 passengers · 1,379 mi
88.6%
Load
Boston – San Francisco (BOS–SFO)
2,644 departures · 410,741 passengers · 2,704 mi
86.8%
Load
2,587 departures · 397,394 passengers · 1,400 mi
85.8%
Load
Dulles – San Francisco (IAD–SFO)
2,549 departures · 383,779 passengers · 2,418 mi
84.1%
Load
Cancún – Houston (CUN–IAH)
2,424 departures · 340,537 passengers · 811 mi
78.5%
Load
2,121 departures · 329,017 passengers · 937 mi
86.7%
Load
Newark – Santiago (EWR–STI)
2,072 departures · 331,986 passengers · 1,481 mi
89.5%
Load
Houston – San Salvador (IAH–SAL)
1,972 departures · 324,286 passengers · 1,207 mi
91.9%
Load
Dulles – Los Angeles (IAD–LAX)
1,958 departures · 304,447 passengers · 2,288 mi
86.9%
Load
1,818 departures · 279,759 passengers · 758 mi
86.0%
Load
Newark – Santo Domingo (EWR–SDQ)
1,815 departures · 285,897 passengers · 1,557 mi
88.0%
Load
1,779 departures · 256,957 passengers · 925 mi
80.7%
Load
Orlando – San Francisco (MCO–SFO)
1,763 departures · 271,527 passengers · 2,446 mi
86.0%
Load
Cancún – Newark (CUN–EWR)
1,731 departures · 261,625 passengers · 1,546 mi
84.4%
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
2,785 mi
6h 13m block · 140 departures · 87% 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 13m block · 133 departures · 70% load
Flown by United Airlines.
Source: US DOT Bureau of Transportation Statistics, T-100 Segment. Data through July 2026.
Where United Airlines flies the 737 MAX 9 from
United Airlines flies its 737 MAX 9 from 80 US airports in 15 countries. The busiest, by departures:
- EWR
18,971 departures · 46 routes
13.6%
Share
- IAH
16,025 departures · 47 routes
11.5%
Share
- SFO
12,623 departures · 31 routes
9.1%
Share
- IAD
10,311 departures · 34 routes
7.4%
Share
- ORD
9,215 departures · 38 routes
6.6%
Share
- DEN
7,995 departures · 42 routes
5.8%
Share
- LAX
6,312 departures · 17 routes
4.5%
Share
- MCO
4,377 departures · 8 routes
3.1%
Share
- CUN
Cancún
4,080 departures · 7 routes
2.9%
Share
- BOS
3,929 departures · 7 routes
2.8%
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 80 US airports across 15 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 3.7 yr, ranging from 0.8 yr to 8.5 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 FAI–ORD, about 2,785 miles.