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The United Airlines Boeing 737-900ER seats 179 passengers across 3 cabins. Every row below is rated on legroom, location and distance from galleys and lavatories.
Verified by John McKeanLast verified 19 July 2026Cross-referenced
Power · Wi-Fi · Screen
Power · Wi-Fi · Screen
The United Airlines Boeing 737-900ER carries 179 passengers across United First + Economy Plus + Economy. Power and Wi-Fi are available on this aircraft. Every seat is rated below, so you can see which have the legroom, the window alignment and the quiet — and which sit next to a galley or lavatory.
The seats rated best on this map are 1A, 1F, 2A, 2F, 3A, 3F. Another 71 seats are rated best or good. Look for exit rows 20, 21 and 57 extra-legroom seats for the most room.
Seats rated avoid on this map are 37A, 37B, 37C, 37D, 37E, 37F. Another 12 seats are rated avoid. These are usually the back rows near the galley and lavatories, or middle seats with no window or aisle.
The 737-900ER operates on longer domestic sectors — think transcontinental or high-frequency routes between major hubs. Its range also enables some thin international routes where a widebody would be uneconomical.
United First on the 737-900ER is a domestic-style recliner, not the Polaris lie-flat product found on widebody international aircraft. If you are comparing the two, Polaris is a substantially more premium experience reserved for long-haul international flying.
On a transcontinental or four-plus hour domestic sector, Economy Plus legroom makes a real difference in comfort. The additional pitch reduces that cramped feeling on long hauls — it is generally more worth it the longer the flight.
20United First45Economy Plus114Economy179Total