Booking portals and tagline

So after taglines of some of the most loved cars we will see how different booking portals have created their tagline.
While some of the portals want to connect with the customer by creationg a emotional connect. e.g. Yatra.com's creating happy travellers & Makemytrip's memory unlimited.
But most of the other portals have choosen a tagline which show they are the cheapest or largest or best. Just have a look....

Yatra.com- Creating happy travelers.

Makemytrip- Memories Unlimited

Expedia - World’s Largest Online Travel Company.

Travelocity- Lowest Price Guaranteed

Travelguru-  India’s largest hotel network

Ezeego- India’s biggest online travel Bazzar