How to get order data by order increment id programmatically Magento 2?

You can get the Order data by order increment id in Magento 2.

Using Magento\Sales\Api\OrderRepositoryInterface interface, you need to use getList() function to fetch order data by order increment id.

Use below code snippet to fetch order data by order increment id in Magento 2

<?php
namespace Path\To\Class;

use Exception;
use Psr\Log\LoggerInterface;
use Magento\Sales\Api\Data\OrderInterface;
use Magento\Sales\Api\OrderRepositoryInterface;
use Magento\Framework\Api\SearchCriteriaBuilder;

class OrderData
{
    /**
     * @var SearchCriteriaBuilder
     */
    protected $searchCriteriaBuilder;

    /**
    * @var OrderRepositoryInterface
    */
    private $orderRepository;

    /**
     * @var LoggerInterface
     */
    private $logger;

    public function __construct(
        SearchCriteriaBuilder $searchCriteriaBuilder,
        OrderRepositoryInterface $orderRepository,
        LoggerInterface $logger
    ) {
        $this->searchCriteriaBuilder = $searchCriteriaBuilder;
        $this->orderRepository = $orderRepository;
        $this->logger = $logger;
    }

    /**
     * Get Order data by Order Increment Id
     *
     * @param $incrementId
     * @return \Magento\Sales\Api\Data\OrderInterface[]|null
     */
    public function getOrderIdByIncrementId($incrementId)
    {
        $searchCriteria = $this->searchCriteriaBuilder
            ->addFilter('increment_id', $incrementId)->create();
        $orderData = null;
        try {
            $order = $this->orderRepository->getList($searchCriteria);
            if ($order->getTotalCount()) {
                $orderData = $order->getItems();
            }
        } catch (Exception $exception)  {
            $this->logger->critical($exception->getMessage());
        }
        return $orderData;
    }
}

Call function with order Increment id

$orderIncrementId = 000000001; // order increment_id
$order = $this->getOrderIdByIncrementId($orderIncrementId);

foreach ($order as $orderData) {
    $orderId = (int)$orderData->getId();
    var_dump($orderData);
}

You got the Order object for the var_dump in the above output.