landingDateTime

<?php
declare(strict_types=1);

function landingDateTime(string $departureTimeZone, string $departureDateTime,
                         string $flightTime, string $destinationTimeZone): array
{
    $departure = new DateTimeImmutable($departureDateTime, new DateTimeZone($departureTimeZone));
    $dateTime['departure'] = $departure;

    $arrival = new DateTime($departureDateTime, new DateTimeZone($departureTimeZone));
    [$hours, $minutes, $seconds] = explode(':', $flightTime);
    $arrival->add(new DateInterval(sprintf('PT%sH%sM%sS', $hours, $minutes, $seconds)));
    $arrival->setTimezone(new DateTimeZone($destinationTimeZone));
    $dateTime['arrival'] = $arrival;

    return $dateTime;  // return a pair of datetime objects
}


$eol = empty($argc) ? '<br>' : PHP_EOL;  // determine end of line


/*
 * Set flight details
 */
$departureTimeZone = 'Europe/Paris';
$departureDateTime = '2023-02-21 08:26:00';
$flightTime = '10:15:07';
$destinationTimeZone = 'America/Lima';

$landingDateTime = landingDateTime($departureTimeZone, $departureDateTime, $flightTime,
                                   $destinationTimeZone);

printf('Depart: %s   Arrive: %s' . $eol . $eol,
       $landingDateTime['departure']->format('d/M/Y H:i:s'),
       $landingDateTime['arrival']->format('d/M/Y H:i:s'));