United Airlines 737-900ER
UANarrow-body jet
Fleet as reported in the 2025 annual filing · Registry & ages refreshed Sep 1, 2026
- Passengers flown a year
- 21.4M
- 2nd-largest United Airlines sub-fleet
- Airframes in the filing
- 136
- Airports served
- 85
- Countries
- 12
- Departures a day
- 400
- Average age
- 13.5 yr
How United Airlines flies its 737-900ER
Filed traffic dataThe count above is the 737-900ER airframes United Airlines owns (US DOT Form 41). This is how it actually flew them to 85 airports across 12 countries — the capacity and busiest routes filed with US DOT T-100 over the trailing 12 months.
Departures flown
146,141
May 2026
Seats flown
26,159,239
Passengers
21.4M
Load factor
83.5%
RPM ÷ ASM
Block hours
433,812
United Airlines's busiest 737-900ER routes
Its busiest 737-900ER routes over the trailing 12 months, by departures.
3,916 departures · 605,514 passengers · 937 mi
86.4%
Load
Houston – Los Angeles (IAH–LAX)
3,431 departures · 538,261 passengers · 1,379 mi
87.6%
Load
3,373 departures · 529,742 passengers · 719 mi
87.7%
Load
2,776 departures · 424,347 passengers · 925 mi
85.4%
Load
2,555 departures · 399,697 passengers · 1,400 mi
87.4%
Load
Houston – San Francisco (IAH–SFO)
2,509 departures · 370,676 passengers · 1,635 mi
82.5%
Load
2,373 departures · 355,598 passengers · 862 mi
83.7%
Load
Newark – Fort Lauderdale (EWR–FLL)
2,263 departures · 332,648 passengers · 1,065 mi
82.1%
Load
2,183 departures · 330,016 passengers · 1,452 mi
84.5%
Load
Los Angeles – San Francisco (LAX–SFO)
1,959 departures · 293,133 passengers · 337 mi
83.6%
Load
1,920 departures · 291,321 passengers · 1,085 mi
84.8%
Load
Cancún – Houston (CUN–IAH)
1,751 departures · 242,920 passengers · 811 mi
77.5%
Load
1,730 departures · 269,553 passengers · 1,605 mi
87.1%
Load
Newark – West Palm Beach (EWR–PBI)
1,720 departures · 246,519 passengers · 1,024 mi
80.1%
Load
1,645 departures · 253,858 passengers · 758 mi
86.2%
Load
The longest and shortest United Airlines 737-900ER 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
2,522 mi
Philadelphia – San Francisco (PHL–SFO)
5h 48m block · 229 departures · 88% 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.
Source: US DOT Bureau of Transportation Statistics, T-100 Segment. Data through May 2026.
Where United Airlines flies the 737-900ER from
United Airlines flies its 737-900ER from 85 US airports in 12 countries. The busiest, by departures:
- EWR
16,198 departures · 35 routes
11.8%
Share
- DEN
15,940 departures · 57 routes
11.6%
Share
- ORD
15,605 departures · 54 routes
11.4%
Share
- IAH
15,588 departures · 41 routes
11.4%
Share
- IAD
10,380 departures · 32 routes
7.6%
Share
- LAX
6,182 departures · 14 routes
4.5%
Share
- SFO
5,223 departures · 17 routes
3.8%
Share
- MCO
4,120 departures · 7 routes
3.0%
Share
- LAS
3,921 departures · 7 routes
2.9%
Share
- CUN
Cancún
2,940 departures · 8 routes
2.1%
Share
Where the 737-900ER sits in United Airlines's fleet
The 737-900ER is 12.6% 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 737-900ER 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 136 737-900ER tail numbers in United Airlines's fleet →
Monthly United Airlines 737-900ER capacity
Frequently asked
How many 737-900ER does United Airlines have?
United Airlines operates about 136 737-900ER aircraft — 136 in service and 0 stored in its latest US DOT fleet filing.
Where does United Airlines fly the 737-900ER?
United Airlines flies its 737-900ER to about 85 US airports across 12 countries, its busiest route being EWR–MCO.
How old are United Airlines's 737-900ER?
United Airlines's 737-900ER fleet averages about 13.5 yr, ranging from 0.7 yr to 18.7 yr.
What is the longest 737-900ER route United Airlines flies?
The longest 737-900ER route United Airlines flew over the trailing 12 months is PHL–SFO, about 2,522 miles.