窓側	155766	96.6%
窓側席	5529	3.4%

Xref not needed.

@@ -14,2 +13,0 @@
-<xref type="see" seq="2800960">窓側席</xref>
-<xref type="see" seq="2800960">窓側席</xref>
@@ -17 +15 @@
-<gloss>window (seat) (e.g. on a plane)</gloss>
+<gloss>window (seat, e.g. on a plane)</gloss>

窓側	155766	50.8%
窓側の席	26070	8.5%
窓側席	5529	1.8%
通路側	90156	29.4%
通路側の席	8497	2.8%
通路側席	1355	0.4%
真ん中の席	17929	5.8%
真ん中席	1300	0.4%

窓側	155766	  
窓側の	50537	  
窓側・通路	4803	  
窓側・通路側	4741	
窓側のカウンター	1062	 
窓側希望	740	
窓側の人	737	  
窓側のベッドに	354

飛行機でおすすめの座席は窓側？通路側？77%が●側と回答！
https://www.expedia.co.jp/stories/飛行機でおすすめの座席は窓側？通路側？77が●側/

https://famzau.com/2021/06/13/english-seat/#window_seataisle_seat
「窓側の席」はwindow seat、「通路側の席」はaisle seat

https://kotobank.jp/word/窓側-2084009
〘名〙 部屋や乗り物の中で、より窓に近い方。また、その部分。窓のそば。
※鳥影（1908）〈石川啄木〉三「昌作は、窓側の机の下に毛だらけの長い脛を投げ入れて」

Leading note: Image results for the unadorned 窓側 are all airplanes.

I was actually looking for "middle seat", which isn't yet here, and it was the inconsistency between 窓側席(window seat) and 通路側(aisle seat) that caught my eye before noticing that 窓側 was also already in here.

As in English, it seems like "you want the window or the aisle" works similarly to 通路側か、窓側か。 "Seat" is optional but otherwise implied.

窓側 is indeed "window-side".  You could use it at a table for a restaurant, it seems.  But unlike, say, 真ん中・真ん中の席・真ん中席 (middle seat), the airplane usage seems eminently common compared to other uses.

@@ -12,0 +13,3 @@
+<xref type="see" seq="2020690">通路側</xref>
+<xref type="see" seq="2800960">窓側席</xref>
+<xref type="see" seq="2800960">窓側席</xref>
@@ -13,0 +17 @@
+<gloss>window (seat) (e.g. on a plane)</gloss>