Hello,
Actually, the issue has raised due to incompatibility of theme you have used with the WP Travel plugin. However, to resolve the layout issue, please add following given CSS code in Additional CSS section by going to Admin Panel > Appearance > Customize > Additional CSS
.pax-select-container .icon-minus:before,
.pax-select-container .icon-plus:before{
content:unset!important;
}
.paxpicker-input{
padding-left: 0px !important;
}
@media screen and (max-width: 991px){
.pax-select-container .pax-picker-minus{
padding-left: 0px;
padding-right: 3px;
}
.pax-select-container .pax-picker-plus{
padding-left: 3px;
padding-right: 0px;
}
}
Hope this helps.
If you have any queries further, let us know.
Thank you.