Airlines will often brand their aircraft with a placard that reveals its model. These markings are typically placed under the last few windows, under the cockpit windows, or even on the front landing gear door.
Larger aircraft like the Boeing 787 Dreamliner or 747-8i do have these engine chevrons but those planes are markedly larger. AP Photo/Ted S. Warren This type of winglet, however, can be easily confused with the split scimitar winglet found on some updated 737 Next Generation aircraft flying for Southwest, United, and Alaska, so this method of identification should only be used in conjunction with another identifying feature. Business Insider/David Slotnick
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