WestJet Airlines (Calgary) intends to conduct a trial to intentionally keep the middle seats open for its seasonal flights between Alberta and Hawaii (it also saves weight for the long-range 737 flights).

News link:

www.theglobeandmail.com/globe-investor/westjet-plans-trial-to-leave-middle-seats-empty/article1331362/

AG Photo Link:

airlinersgallery.com/2/7b473/#/gallery/westjet-airlines/