Display Flex
section.flight-vocher .flight-inner { display : flex ; justify-content : center ; align-items : center ; text-align : center ; } <div class="flight-inner"> <div class="apply-btn-d"> <a href="tel:+1-858-788-3848" class="apply-btn">Call Us</a> </div> <div class="apply-btn-d"> <a href="contact.php" class="apply-btn">Enquiry</a> </div> <div class="apply-btn-d"> <a href="https://api.whatsapp.com/send?phone=8872079602" class="apply-btn">Chat with us</a> </div> </div>