# Boeing 737-900ER seat maps

URL: https://departcart.com/seat-maps/aircraft/boeing-737-900er-b739

Updated: 2026-08-03

Researched Boeing 737-900ER seat maps: 2 airlines, 2 cabin layouts, cabin by cabin, with real rows, exits and seat pitch where it is published.

## The airframe

ICAO type code: B739
Manufacturer: Boeing
Family: 737 NG
Category: narrowbody
Length: 42.11 m
Wingspan: 35.79 m
Engines: 2

## What we have researched

Airlines with a published layout: 2
Cabin layouts: 2
Seats per layout: 178 to 180
Regions: North America
Cabin mix: Business 36, Economy 322
Seat pitch published: 2 of 4 cabins

Among published Boeing 737-900ER layouts, the layout from Alaska Airlines carries the fewest seats at 178, while the layout from Delta Air Lines carries the most at 180. Published economy pitch across researched Boeing 737-900ER cabins ranges from 30" to 31" where it is recorded.

[How much the same aircraft varies between airlines](/learn/cabin-layout-variation) puts these differences in context across every researched type.

Every researched cabin: [Airline seat maps](https://departcart.com/seat-maps)

## Airlines flying it

- [Alaska Airlines](https://departcart.com/seat-maps/alaska-airlines-as/boeing-737-900er-b739), 178 seats, North America
- [Delta Air Lines](https://departcart.com/seat-maps/delta-air-lines-dl/boeing-737-900er-b739), 180 seats, North America

## Where this comes from

Every layout above is researched against published cabin plans for the operator that flies it and then checked against live availability. Where a figure is not known it says so rather than being estimated, which is why some pitch cells read "not recorded" instead of carrying a number we would not defend.

The same aircraft type is not the same cabin at two airlines. Seat count, pitch and the number of classes are decisions the operator makes, which is why this page counts layouts separately from airlines and links each one rather than publishing a single plan for the type.