The best alternatives to Flight Icons are Feather, Icons8, and IconBros. If these 3 options don't work for you, we've listed over 10 alternatives below.
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Feather is a collection of simply beautiful open source icons. Each icon is designed on a 24x24 grid with an emphasis on simplicity, consistency and readability.
Streamline 3.0 is the world’s largest icon pack. Weighing in at over 30,000 icons, 3 unique weights, 53 categories, and 720 subcategories. Download 30,000 Free PNG icons or buy the premium vector pack (iconjarsketchfigxdsvgaipdfpng files).
IconScout is a design resources marketplace for icons, illustrations, 3D assets and Lottie animations. Powered by a community of passionate designers, IconScout is the simplest way to sell, share & exchange design assets to a worldwide audience.
Lordicon is a package of 627 interactive, animated icons to help your project stand out and make a long-lasting impression on your users. Icons are delivered in JSON (Lottie), GIF and Adobe After Effects formats.
The pack you've been looking for to bring your website or app to the next level. This pack contain 100 animated icons, rendered in svg, ready to be integrated to your website. The pack will be regularily updated with new versions of the icons to fit all your needs.