Boeing 737-900ER
Narrow-body jet
- Passengers flown a year
- 67.2M
- 7th-most common US type
- Airframes in US fleets
- 383
- US operators
- 4
- Airports served
- 132
- 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
459,441
May 2026
Seats flown
82,088,266
Passengers
67.2M
Load factor
83.2%
RPM ÷ ASM
Block hours
1,318,827
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)
6,022 departures · 903,207 passengers · 356 mi
85.6%
Load
Atlanta – Kansas City (ATL–MCI)
4,967 departures · 716,294 passengers · 692 mi
81.7%
Load
Atlanta – Charleston (ATL–CHS)
4,818 departures · 703,702 passengers · 259 mi
83.1%
Load
Atlanta – Indianapolis (ATL–IND)
4,423 departures · 625,942 passengers · 432 mi
79.9%
Load
3,922 departures · 559,238 passengers · 215 mi
80.8%
Load
3,916 departures · 605,514 passengers · 937 mi
86.4%
Load
3,686 departures · 530,929 passengers · 214 mi
82.7%
Load
Los Angeles – Seattle (LAX–SEA)
3,637 departures · 494,962 passengers · 954 mi
76.1%
Load
3,521 departures · 556,686 passengers · 2,182 mi
88.1%
Load
Houston – Los Angeles (IAH–LAX)
3,431 departures · 538,261 passengers · 1,379 mi
87.6%
Load
3,381 departures · 482,992 passengers · 1,448 mi
80.2%
Load
3,374 departures · 529,912 passengers · 719 mi
87.7%
Load
Los Angeles – San Francisco (LAX–SFO)
3,369 departures · 501,814 passengers · 337 mi
83.1%
Load
Las Vegas – Los Angeles (LAS–LAX)
3,354 departures · 437,742 passengers · 236 mi
72.7%
Load
3,352 departures · 498,665 passengers · 867 mi
83.2%
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 27m block · 195 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.
Source: US DOT Bureau of Transportation Statistics, T-100 Segment. Data through May 2026.
Airports the Boeing 737-900ER serves
The Boeing 737-900ER serves 132 US airports across 17 countries. The busiest, by departures:
- ATL
63,130 departures · 81 routes · 3 operators
14.2%
Share
- SEA
34,534 departures · 69 routes · 3 operators
7.8%
Share
- EWR
19,096 departures · 39 routes · 3 operators
4.3%
Share
- MSP
18,487 departures · 47 routes · 3 operators
4.2%
Share
- ORD
18,392 departures · 57 routes · 3 operators
4.1%
Share
- DEN
18,390 departures · 59 routes · 3 operators
4.1%
Share
- LAX
16,915 departures · 34 routes · 3 operators
3.8%
Share
- IAH
16,173 departures · 41 routes · 3 operators
3.6%
Share
- SFO
13,425 departures · 28 routes · 3 operators
3.0%
Share
- SLC
11,614 departures · 29 routes · 3 operators
2.6%
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 | 40.3M | 49.1% | 10.1 yr |
| United AirlinesUA | 136 | 26.2M | 31.9% | 13.5 yr |
| Alaska AirlinesAS | 79 | 15.7M | 19.1% | 10.6 yr |
| Sun Country AirlinesSY | 5 | — | — | 5.3 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 6,022 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 40.3M seats flown over the trailing 12 months.
How many passengers does the Boeing 737-900ER carry?
The Boeing 737-900ER carried about 67.2M 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 132 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 11.3 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 | Turkish Airlines (ECONOMY) | Boeing 737-900ER | Istanbul - Djibouti - Mogadishu
16:10 · Jul 2019
Global Aviation & Travel
REVIEW | Delta Air Lines | Seattle (SEA) - Phoenix (PHX) | Boeing 737-900ER | Economy Class
20:21 · Jan 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.