Flight Deal/price Monitoring System Development - help needed with API and historical data

Job ID: 40261427

Budget: $30 – $250 USD

I subscribe to a Norwegian flight deal service that constantly sends out amazing deals — both short European routes and long-haul like Bangkok, Miami, San Francisco and Johannesburg. Each deal shows a % discount vs the normal price, and alerts come in dozens of times per day. I want to build something similar.

The goal is to surface truly discounted flights from Norwegian airports by comparing real-time fares against historical averages, then publish the percentage drop (e.g. "-53% vs. typical price").

What I need from you:

• How do services like this monitor hundreds of routes constantly — including long-haul — without spending a fortune on API calls?

• How do they get the "normal price" to compare against? Do they store historical data themselves or use an API that provides it?

• A clear recommendation on which API(s) make the most sense — Amadeus, Skyscanner, Kiwi/Tequila, SerpApi or anything else you've used successfully — and why.

• Confirmation that your proposed solution captures low-cost carriers like Ryanair, Norwegian and Wizz Air alongside legacy airlines.

• A realistic cost model for a small site just getting traction: expected monthly spend, rate limits and ways to keep costs down while scaling.

If you've already solved similar price-tracking or deal-detection challenges, briefly describe that experience. Practical know-how matters more than a lengthy proposal.

I already have a working website and database up and running. Looking for the right expert to take it to the next level.