Integrate Duffel API & Merge Itineraries

I want to bring the full Duffel Flight API into my current flight-booking site from scratch and then use it to create a seamless EgyptAir + Kuwait Airways itinerary. The goal is simple: whenever someone... (Budget: $30 - $250 USD, Jobs: API Integration, HTML, MySQL, Payment Processing, PHP, User Interface / IA, Web Development, Website Design)