Boeing 737-900ER
Narrow-body jet
- Passengers flown a year
- 67.1M
- 7th-most common US type
- Airframes in US fleets
- 383
- US operators
- 4
- Airports served
- 136
- Countries
- 17
- Load factor
- 83.2%
Where the Boeing 737-900ER flies
Filed traffic dataThe operators table below counts the registered Boeing 737-900ER airframes each airline owns (US DOT Form 41). These figures are how much the type actually flew — departures, seats, and passengers filed with US DOT T-100 over the trailing 12 months, not fleet size.
Departures flown
458,621
July 2026
Seats flown
81,964,706
Passengers
67.1M
Load factor
83.2%
RPM ÷ ASM
Block hours
1,306,259
Busiest Boeing 737-900ER routes
The Boeing 737-900ER's busiest US routes over the trailing 12 months, by departures.
Atlanta – Raleigh/Durham (ATL–RDU)
6,007 departures · 903,343 passengers · 356 mi
85.8%
Load
Atlanta – Kansas City (ATL–MCI)
4,908 departures · 716,573 passengers · 692 mi
82.6%
Load
Atlanta – Charleston (ATL–CHS)
4,803 departures · 707,690 passengers · 259 mi
83.5%
Load
Atlanta – Indianapolis (ATL–IND)
4,236 departures · 604,278 passengers · 432 mi
80.7%
Load
3,996 departures · 617,179 passengers · 937 mi
86.3%
Load
3,785 departures · 539,242 passengers · 215 mi
80.6%
Load
Los Angeles – San Francisco (LAX–SFO)
3,657 departures · 539,254 passengers · 337 mi
82.3%
Load
Los Angeles – Seattle (LAX–SEA)
3,575 departures · 486,975 passengers · 954 mi
76.2%
Load
Atlanta – New Orleans (ATL–MSY)
3,511 departures · 527,276 passengers · 425 mi
84.8%
Load
3,464 departures · 492,720 passengers · 1,448 mi
79.9%
Load
3,461 departures · 514,889 passengers · 272 mi
84.1%
Load
Houston – Los Angeles (IAH–LAX)
3,431 departures · 536,929 passengers · 1,379 mi
87.4%
Load
3,424 departures · 494,172 passengers · 214 mi
82.5%
Load
Las Vegas – Los Angeles (LAS–LAX)
3,336 departures · 431,190 passengers · 236 mi
71.9%
Load
3,300 departures · 488,029 passengers · 867 mi
82.7%
Load
The longest and shortest Boeing 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
2,846 mi
6h 26m block · 173 departures · 85% load
Flown by Alaska 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
95 mi
39m block · 97 departures · 54% load
Flown by Alaska Airlines. About 39m of block time, most of it connecting traffic feeding the hub.
Source: US DOT Bureau of Transportation Statistics, T-100 Segment. Data through July 2026.
Airports the Boeing 737-900ER serves
The Boeing 737-900ER serves 136 US airports across 17 countries. The busiest, by departures:
- ATL
63,274 departures · 84 routes · 3 operators
14.3%
Share
- SEA
34,206 departures · 69 routes · 3 operators
7.7%
Share
- ORD
19,275 departures · 62 routes · 3 operators
4.3%
Share
- EWR
18,172 departures · 40 routes · 3 operators
4.1%
Share
- DEN
18,012 departures · 60 routes · 3 operators
4.1%
Share
- MSP
17,960 departures · 46 routes · 3 operators
4.0%
Share
- LAX
16,608 departures · 35 routes · 3 operators
3.7%
Share
- IAH
15,453 departures · 41 routes · 3 operators
3.5%
Share
- SFO
13,868 departures · 30 routes · 3 operators
3.1%
Share
- PDX
11,785 departures · 34 routes · 3 operators
2.7%
Share
Who flies the Boeing 737-900ER
Two questions in one table. Airframes is what each carrier reported owning in its US DOT fleet filing; seats flown is how much of the type it actually operated. They can rank differently, and the gap is the interesting part.
| Operator | ||||
|---|---|---|---|---|
| Delta Air LinesDL | 163 | 40M | 48.9% | 10.2 yr |
| United AirlinesUA | 136 | 26.2M | 31.9% | 13.6 yr |
| Alaska AirlinesAS | 79 | 15.8M | 19.2% | 10.7 yr |
| Sun Country AirlinesSY | 5 | — | — | 5.4 yr |
Airframes are the latest Form 41 filing; seats flown and share are US DOT T-100 for the type's most-flown operators — a dash means a carrier isn't among them (a freighter operator, or one that flies fewer).
How old is the US Boeing 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.
Monthly Boeing 737-900ER capacity
How common is the Boeing 737-900ER?
The Boeing 737-900ER makes up 4.4% of all tracked US airline aircraft — the 7th-most common type in service.
Share of all tracked US airline aircraft · top 12 types shown · 119 others hold the remaining 37.6% · Boeing 737-900ER is the ringed slice at 4.4%
- 1
872 aircraft
10.0%
Share
- 2
708 aircraft
8.1%
Share
- 3
526 aircraft
6.1%
Share
- 4
481 aircraft
5.5%
Share
- 5
470 aircraft
5.4%
Share
- +1 more type
- 7
Boeing 737-900ER#7 · this type
383 aircraft
4.4%
Share
Frequently asked
How many Boeing 737-900ER are in US airline fleets?
US carriers operate about 383 Boeing 737-900ER aircraft across 4 airlines, 381 of them in service.
Which airline operates the most Boeing 737-900ER?
Delta Air Lines operates the largest US Boeing 737-900ER fleet, with about 163 aircraft.
What is the busiest Boeing 737-900ER route?
The busiest US route flown by the Boeing 737-900ER is ATL–RDU, with about 6,007 departures over the trailing 12 months.
Which airline flies the Boeing 737-900ER the most?
Delta Air Lines flies the most Boeing 737-900ER capacity in US service, with about 40M seats flown over the trailing 12 months.
How many passengers does the Boeing 737-900ER carry?
The Boeing 737-900ER carried about 67.1M passengers on US routes over the trailing 12 months.
What is the longest Boeing 737-900ER flight?
The longest US route flown by the Boeing 737-900ER is ANC–ORD, about 2,846 miles, flown by Alaska Airlines.
How many airports does the Boeing 737-900ER serve?
The Boeing 737-900ER serves about 136 US airports across 17 countries, led by Atlanta (ATL).
How old is the average Boeing 737-900ER?
The US Boeing 737-900ER fleet averages about 11.5 yr.
How common is the Boeing 737-900ER in US fleets?
The Boeing 737-900ER is the 7th-most common aircraft type in tracked US airline fleets, by number of aircraft.
Trip reports on YouTube
Fliers post trip reports from Boeing 737-900ER flights to YouTube. These three were matched automatically from public YouTube listings — The Frequent Flier does not host, review, or endorse them.
Simply Aviation
TRIPREPORT | Somon Air (ECONOMY) | Dushanbe - Moscow Domodedovo | Boeing 737-900ER
10:11 · Feb 2020
AlaskaTripReports
TRIP REPORT FIRST CLASS SEA-ANC ALASKA AIRLINES 737-900ER!
28:16 · Feb 2026
Source: YouTube. Titles, thumbnails, and channel names come from YouTube. Playing a video loads the YouTube player, and using it means you agree to the YouTube Terms of Service; the Google Privacy Policy applies.