Looking at booking Iceland air for the first time- I am a bigger guy 6'2" 220 - and obviously like leg room. How does iceland air compare to more "traditional:" airlines such as United/AA/Lufthansa, etc? I don't need great service, I just want to be comfortable on the long flight - obviously I could book business class if I need more room, but just seeing if there really is a difference between riding their 737 vs a widebody in turn of actual "in seat" comfort. I know a widebody will have more room to stand up and walk around. I am guessing a 737 with iceland air is like a typical domestic US flight?

thanks