Boeing 737-900ER
A single-aisle, twin-engine jet from the Boeing 737 Next Generation series: the extended-range 737-900.
- LENGTH
- 42.11 m
- WINGSPAN
- 35.79 m
- MAX SEATS
- 215
737-900ER aircraft in service with the low-cost airlines we list.
flown by 3 low-cost airlines
Low-cost airlines flying the 737-900ER
Ranked by aircraft in service. Share is this type as a percentage of each airline's whole fleet.
As of August 2025 – July 2026Source: LowFaresAirline fleet database- 1Thai Lion Air29% of fleetAs of August 2025Wikipedia fleet table8 in service29% of fleetProfile →
- 2Sun Country Airlines6% of fleetAs of 30 June 2026Airline report · listed as “Boeing 737-900ER (passenger)”3 in service6% of fleetProfile →
- 3Smartwings5% of fleetAs of July 2026Wikipedia fleet table2 in service5% of fleetProfile →
Not counted above: 636 737 family aircraft at Ryanair (“Boeing 737-800/-700 (split not published)”, 411), GOL (“Boeing 737 passenger (split not given)”, 132), Akasa Air (“Boeing 737 MAX”, 43) and Transavia (“Boeing 737”, 33) and 1 more airline, whose sources don’t say which type they are. They count in the 737 family and Boeing totals only.
How many seats each airline fits
We don’t have a verified seat map for the 737-900ER yet.
We only show seat counts we can source and date. Until then, here is Boeing's own figure for reference.
More in the 737 family
737-900ER questions
Which low-cost airlines fly the 737-900ER?
3 of the low-cost airlines we list fly it (figures dated August 2025 – July 2026). Thai Lion Air has the most, 8, followed by Sun Country Airlines (3) and Smartwings (2). The full ranked list is above, with each airline's source.
How big is the 737-900ER?
Boeing gives it as 42.11 m long and 35.79 m across the wings (maximum is the faa exit limit). Source: Boeing 737NG airport planning document, read 25 October 2026.
Which other 737 family aircraft do low-cost airlines fly?
the 737-800 (328), the 737 MAX 8 (238), the 737 MAX 8-200 (229) and the 737-700 (9) and more. Each has its own page ranking the airlines that fly it.
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