CORS Problem

[maratime]

Hello, I can't figure out how to get my code to work in production. I've change the .htaccess file on the server and tried everything I could find on the internet for a fix. Lots of testing...... I need help?
Works fine in Firefox with Cors Everywhere extension.

Console Error:
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://aviationweather.gov/api/data/metar?ids=Kjka%2CKcqf%2CKmob&format=geojson. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing). Status code: 200.

My Code:
const url = 'https://aviationweather.gov/api/data/metar?ids=Kjka%2CKcqf%2CKmob&format=geojson';

// get weather information
const getWeather = async () => {

const response = await fetch(url, 
  {method: 'GET',
    headers: {
    'Accept': "application/json",
    'User-Agent': "collierairpark.com; [email protected]",
    'Access-Control-Allow-Origin': "Origin, X-Requested-With, Content-Type, Accept"
  }});
if(response.status !== 200){
    throw new Error('cannot fetch the data not 200');
  }
const data = await response.json();

return data;

};

getWeather().then(data => {
console.log('promise 1 resolved:', data);

  if (typeof data.features[3] === "undefined") {
    console.log("features 3 is undefined");
    
    data.features[3] = '';
    if (typeof data.features[2] === "undefined") {
      data.features[2] = '';
     
    }
    if (typeof data.features[1] === "undefined") {
      data.features[1] = '';
    
    }
    
  } else {
    console.log("myVariable is defined");
  }
        
var metar = data.features[1].properties;
var metar2 = data.features[2].properties;
var metar3 = data.features[3].properties;

document.getElementById('icao1').innerText = metar.id;
document.getElementById('f_cat1').innerText = metar.fltcat;
document.getElementById('met1').innerText = metar.rawOb;
document.getElementById('icao2').innerText = metar2.id;
document.getElementById('f_cat2').innerText = metar2.fltcat;
document.getElementById('met2').innerText = metar2.rawOb;
document.getElementById('icao3').innerText = metar3.id;
document.getElementById('f_cat3').innerText = metar3.fltcat;
document.getElementById('met3').innerText = metar3.rawOb;

}).catch(err => console.log('rejected:', err.message));

[scadergit]

Sorry, this support resource is for api.weather.gov. Please see the Aviation API for support for that service.

[maratime]

Somehow you guys are related. I found links to weather.gov from avaitionweather.com and vice versa.

[scadergit]

Both are under the National Weather Service.

[maratime]

I can get the weather fine form weather.gov using same code, but get cors error from avaitionweather.com.
Maybe the JSONLD from weather.gov. is why there's no cors error. You may know?