Express.js API Integration with SkyScanner API Fails to retrieve flights data

I’m working on integrating the Skyscanner Flights Scraper API using Express.js and Axios. The goal is to fetch flight data using the /flights/search-everywhere endpoint. Here’s what I’ve done so far:

Successfully obtained the fromEntityId from the /flights/auto-complete endpoint.
Attempted to use this fromEntityId to search flights via /flights/search-everywhere.
When I test this in the RapidAPI Playground, it works perfectly and returns valid flight data. However, when I run the same query through my local server and Postman, it always returns:

{
“message”: “No flights found”
}

Observations:
In RapidAPI: The request returns valid flight data.
In Postman: The request always responds with “message”: “No flights found”.
I suspect there’s an issue with how I’m passing the fromEntityId or how Axios handles the request, but I’m not sure what I’m doing wrong.
Things I’ve Tried:
Verified that the API key and host are correct.
Double-checked the request headers and parameters against the RapidAPI playground.
Logged the fromEntityId to ensure it’s being received correctly in the server.

/* server.js */

app.post('/flights', async (req, res) => {
    const { fromEntityId } = req.body;

    try {
        const response = await axios.get(`https://${API_HOST}/flights/search-everywhere`, {
            headers: {
                'X-RapidAPI-Host': API_HOST,
                'X-RapidAPI-Key': API_KEY,
            },
            params: {
                query: fromEntityId,
            },
        });

        const flights = response.data?.data?.results || null;

        if (!flights) {
            return res.json({ message: 'No flights found' });
        }

        res.json(flights);
    } catch (error) {
        console.error('Error fetching flights:', error);
        res.status(500).json({ message: 'Error fetching flights. Please try again.' });
    }
});

// Start the server
app.listen(PORT, () => {
    console.log(`Server running on http://localhost:${PORT}`);
});

PostMan Doesn’t WorkAPI Website Works

Could you please kindly help? Thank you!

Observations:
In RapidAPI: The request returns valid flight data.
In Postman: The request always responds with “message”: “No flights found”.
I suspect there’s an issue with how I’m passing the fromEntityId or how Axios handles the request, but I’m not sure what I’m doing wrong.
Things I’ve Tried:
Verified that the API key and host are correct.
Double-checked the request headers and parameters against the RapidAPI playground.
Logged the fromEntityId to ensure it’s being received correctly in the server.