A window-side position is not a window guarantee
A seat letter describes a place in a seating plan. It does not guarantee that a window sits beside that place. The cabin’s seating rows and its window openings are separate features, so an outside seat can face an uninterrupted part of the sidewall.
A schematic drawing cannot establish the precise reason for a particular missing window. Without an aircraft-specific manufacturer or airline explanation, attributing it to a duct, structure or a specific system would go beyond the evidence. For the passenger, the useful fact is the airline’s explicit warning.
Examples from our checked ANA data
ANA’s 194-seat domestic A321 description identifies 17A and 24K as seats without a window. Both positions are recorded with that source-based warning in our A321neo configuration. The annotation belongs to this cabin, not to every A321 operated by every airline.
ANA’s 166-seat domestic Boeing 737-800 description separately flags 10A as lacking a window. This is a different aircraft and cabin plan; it does not establish anything about the identically numbered seat on another carrier.
Check the warning and the booking view
If an outside view matters to you, shortlist another seat that suits your party and compare the airline’s current plan. Keep the configuration identifier with the seat number when checking reviews or reporting a correction.
Our seat details distinguish an explicit no-window annotation from estimated window alignment. Missing source annotations are not a promise of an unobstructed view. Recheck the assigned cabin if your flight changes aircraft.
Related seat maps and directories
Official sources
- ANA A321 194-seat configuration — Retrieved October 31, 2026
- ANA 737-800 166-seat configuration — Retrieved October 31, 2026