HTML:

<template>
    <lightning-datatable key-field="Id"
                         data={contacts}
                         columns={columns}
                         hide-checkbox-column="true"
                         show-row-number-column="true"
                         onrowaction={handleRowAction}>
    </lightning-datatable>
</template>

JavaScript:

import { LightningElement, api, track } from 'lwc';
import { NavigationMixin } from 'lightning/navigation';

const actions = [
    { label: 'View', name: 'view' },
];

const columns = [  
    { label: 'Name', fieldName: 'Name' },
    { label: 'Email', fieldName: 'Email' },
    {
        type: 'action',
        typeAttributes: { rowActions: actions },
    }, 
];

export default class ContactsFlowComponent extends NavigationMixin(LightningElement) {

    @api contacts;
    @track columns = columns;
   
    connectedCallback() {

        console.log( 'Contacts are ' + JSON.stringify( this.contacts ) );
       
    }

    handleRowAction( event ) {

        const row = event.detail.row;
        this[NavigationMixin.Navigate]({
            type: 'standard__recordPage',
            attributes: {
                recordId: row.Id,
                objectApiName: 'Contact',
                actionName: 'view'
            }
        });

    }

}

JavaScript-meta.xml:

<?xml version="1.0" encoding="UTF-8"?>
<LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata">
    <apiVersion>48.0</apiVersion>
    <isExposed>true</isExposed>
    <targets>
        <target>lightning__FlowScreen</target>
    </targets>
    <targetConfigs>
        <targetConfig targets="lightning__FlowScreen">
            <property name="contacts" label="Contacts" type="@salesforce/schema/Contact[]" />
        </targetConfig>
    </targetConfigs>
</LightningComponentBundle>

Flow:

Get Records:

Screen:

Lightning App Builder Configuration:

Output: