var Client = require('node-rest-client').Client;
var username = 'YOUR_USERNAME';
var apiKey = 'YOUR_API_KEY';
var fxmlUrl = 'https://flightxml.flightaware.com/json/FlightXML2/';
var client_options = {
    user: username,
    password: apiKey
};
var client = new Client(client_options);
client.registerMethod('airlineInfo', fxmlUrl + 'AirlineInfo', 'GET');
var airlineInfoArgs = {
    parameters: {
       airlineCode: 'UAL'
    }
};
client.methods.airlineInfo(airlineInfoArgs, function (data, response) {
    console.log(data);
});
							

<?php
$username = "YOUR_USERNAME";
$apiKey = "YOUR_API_KEY";
$fxmlUrl = "https://flightxml.flightaware.com/json/FlightXML2/";

$queryParams = array(
    'ident' => 'SWA45',
    'howMany' => 10,
    'offset' => 10
);
$url = $fxmlUrl . 'FlightInfoEx?' . http_build_query($queryParams);

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_USERPWD, $username . ':' . $apiKey);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);

if ($result = curl_exec($ch)) {
    curl_close($ch);
    echo $result;
}
?>							

string fxmlUrl = "http://flightxml.flightaware.com/json/FlightXML2";
string username = "YOUR_USERNAME";
string apiKey = "YOUR_APIKEY";
var uriBuilder = new UriBuilder(fxmlUrl);
var requestUrl = fxmlUrl
    .AppendPathSegment("AirportInfo")
    .SetQueryParams(new { airportCode = "KIAH" });
var serializer = new DataContractJsonSerializer(typeof(AirportInfoResult));
var client = new HttpClient();
var credentials = Encoding.ASCII.GetBytes(username + ":" + apiKey);
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(credentials));
var streamTask = client.GetStreamAsync(apiUrl);
var airportInfo = serializer.ReadObject(await streamTask) as AirportInfoResult;
Console.WriteLine(airportInfo.AirportResult.Code);