Boeing 737 MAX 9
Narrow-body jet
- Passengers flown a year
- 35.4M
- 16th-most common US type
- Airframes in US fleets
- 200
- US operators
- 2
- Airports served
- 106
- Countries
- 13
- Load factor
- 83.7%
Where the Boeing 737 MAX 9 flies
Filed traffic dataThe operators table below counts the registered Boeing 737 MAX 9 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
241,943
May 2026
Seats flown
43,159,316
Passengers
35.4M
Load factor
83.7%
RPM ÷ ASM
Block hours
834,552
Busiest Boeing 737 MAX 9 routes
The Boeing 737 MAX 9's busiest US 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)
2,894 departures · 437,537 passengers · 2,419 mi
84.5%
Load
2,844 departures · 410,302 passengers · 1,448 mi
81.0%
Load
Boston – San Francisco (BOS–SFO)
2,806 departures · 441,972 passengers · 2,704 mi
88.0%
Load
Houston – Los Angeles (IAH–LAX)
2,549 departures · 402,850 passengers · 1,379 mi
88.3%
Load
Cancún – Houston (CUN–IAH)
2,381 departures · 335,172 passengers · 811 mi
78.6%
Load
Seattle – San Francisco (SEA–SFO)
2,259 departures · 335,276 passengers · 679 mi
83.3%
Load
Los Angeles – Tocumen (LAX–PTY)
2,254 departures · 347,695 passengers · 3,010 mi
90.5%
Load
Miami – Tocumen (MIA–PTY)
2,193 departures · 315,951 passengers · 1,152 mi
83.3%
Load
Los Angeles – Seattle (LAX–SEA)
2,170 departures · 303,071 passengers · 954 mi
78.5%
Load
Las Vegas – San Francisco (LAS–SFO)
2,169 departures · 305,846 passengers · 414 mi
78.9%
Load
2,125 departures · 320,480 passengers · 1,107 mi
84.7%
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
1,948 departures · 289,426 passengers · 1,050 mi
83.5%
Load
The longest and shortest Boeing 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
3,320 mi
Tocumen – San Francisco (PTY–SFO)
2m block · 806 departures · 90% load
Flown by Copa 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 MAX 9 serves
The Boeing 737 MAX 9 serves 106 US airports across 13 countries. The busiest, by departures:
- SEA
27,818 departures · 69 routes · 3 operators
12.1%
Share
- EWR
19,279 departures · 47 routes · 3 operators
8.4%
Share
- SFO
16,612 departures · 38 routes · 4 operators
7.2%
Share
- IAH
14,875 departures · 39 routes · 3 operators
6.5%
Share
- LAX
11,395 departures · 30 routes · 4 operators
5.0%
Share
- IAD
10,908 departures · 34 routes · 4 operators
4.8%
Share
- ORD
9,707 departures · 36 routes · 4 operators
4.2%
Share
- DEN
9,190 departures · 43 routes · 4 operators
4.0%
Share
- PDX
8,381 departures · 32 routes · 2 operators
3.7%
Share
- SAN
7,258 departures · 23 routes · 3 operators
3.2%
Share
Who flies the Boeing 737 MAX 9
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 | ||||
|---|---|---|---|---|
| United AirlinesUA | 120 | 24.8M | 57.4% | 3.5 yr |
| Alaska AirlinesAS | 80 | 15.9M | 36.8% | 3.5 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 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.
Monthly Boeing 737 MAX 9 capacity
How common is the Boeing 737 MAX 9?
The Boeing 737 MAX 9 makes up 2.3% of all tracked US airline aircraft — the 16th-most common type in service.
Share of all tracked US airline aircraft · top 12 types shown · 118 others hold the remaining 35.3% · Boeing 737 MAX 9 is the ringed slice at 2.3%
- 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
- +10 more types
- 16
Boeing 737 MAX 9#16 · this type
200 aircraft
2.3%
Share
Frequently asked
How many Boeing 737 MAX 9 are in US airline fleets?
US carriers operate about 200 Boeing 737 MAX 9 aircraft across 2 airlines, 200 of them in service.
Which airline operates the most Boeing 737 MAX 9?
United Airlines operates the largest US Boeing 737 MAX 9 fleet, with about 120 aircraft.
What is the busiest Boeing 737 MAX 9 route?
The busiest US route flown by the Boeing 737 MAX 9 is IAH–SFO, with about 3,330 departures over the trailing 12 months.
Which airline flies the Boeing 737 MAX 9 the most?
United Airlines flies the most Boeing 737 MAX 9 capacity in US service, with about 24.8M seats flown over the trailing 12 months.
How many passengers does the Boeing 737 MAX 9 carry?
The Boeing 737 MAX 9 carried about 35.4M passengers on US routes over the trailing 12 months.
What is the longest Boeing 737 MAX 9 flight?
The longest US route flown by the Boeing 737 MAX 9 is PTY–SFO, about 3,320 miles, flown by Copa Airlines.
How many airports does the Boeing 737 MAX 9 serve?
The Boeing 737 MAX 9 serves about 106 US airports across 13 countries, led by Seattle (SEA).
How old is the average Boeing 737 MAX 9?
The US Boeing 737 MAX 9 fleet averages about 3.5 yr.
How common is the Boeing 737 MAX 9 in US fleets?
The Boeing 737 MAX 9 is the 16th-most common aircraft type in tracked US airline fleets, by number of aircraft.
Trip reports on YouTube
Fliers post trip reports from Boeing 737 MAX 9 flights to YouTube. These three were matched automatically from public YouTube listings — The Frequent Flier does not host, review, or endorse them.
AK Aviation
Alaska Airlines 737 MAX 9 Economy Class - Los Angeles to Anchorage - TRIP REPORT
16:31 · Jan 2026
The Trip Reporter
TRIP REPORT | Alaska Airlines (Premium) | Seattle to Anchorage | Boeing 737 MAX 9
18:19 · Sep 2024
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.