Add a second Proceed to Checkout link to Cart page: https://www.damiencarbery.com/2017/11/add-a-second-proceed-to-checkout-link-to-cart-page/

add-link-and-div-before-cart.php

<?php
/*
Plugin Name: Proceed to Checkout above cart totals
Plugin URI: http://www.damiencarbery.com/2017/11/add-a-second-proceed-to-checkout-link-to-cart-page/
Description: Add a second "Proceed to Checkout" link above the cart totals.
Author: Damien Carbery
Version: 0.2
*/

// Add 'Proceed to Checkout' button above cart contents table.
add_action( 'woocommerce_before_cart', 'dcwd_proceed_to_checkout_button_above_cart' );
function dcwd_proceed_to_checkout_button_above_cart() {
?>
<div class="proceed-to-checkout-above-cart">
<?php woocommerce_button_proceed_to_checkout(); ?>
</div>
<?php
}

add-link-before-cart.php

<?php
/*
Plugin Name: Proceed to Checkout above cart totals
Plugin URI: http://www.damiencarbery.com/2017/11/add-a-second-proceed-to-checkout-link-to-cart-page/
Description: Add a second "Proceed to Checkout" link above the cart totals.
Author: Damien Carbery
Version: 0.1
*/

// Add 'Proceed to Checkout' button above cart contents table.
add_action( 'woocommerce_before_cart', 'dcwd_proceed_to_checkout_button_above_cart' );
function dcwd_proceed_to_checkout_button_above_cart() {
  woocommerce_button_proceed_to_checkout();
}

proceed-to-checkout-above-cart.css

/* Add 'Proceed to Checkout' button above the cart table. */
.woocommerce .proceed-to-checkout-above-cart .checkout-button {
	float: right;
	margin: 0 0 1em 0;
}
@media (max-width: 768px) {
	.woocommerce .proceed-to-checkout-above-cart .checkout-button {
		display: block;
		float: none;
		margin: 0.5em 1em;
		text-align: center;
	}
}