In recent years, easyJet has transitioned to using custom-developed typefaces for its digital interface and modern advertising campaigns to appear more contemporary while retaining its "friendly" brand voice. These include: Dave Robinson Design the easyGroup brand manual
: Keep in mind that many brands, including airlines, often commission custom fonts for their branding. If that's the case with EasyJet, the font might not be readily available for public use.
EasyJet is a well-known low-cost airline, and I'm assuming the blog post might be referring to their branding or typography.
Unlike many rounded fonts that become muddy at small sizes, the EasyJet Book font maintains large open spaces inside letters like 'e', 'c', and 'a'. The 'a' is a double-story variant (a curved top with a straight stem), which is unusual for a rounded font.
: The first step would be to visit EasyJet's official website or look at their marketing materials directly. Sometimes, brands will list their brand guidelines or provide information about their visual identity.