You can get quick answer of your question by entering here
How do I identify whether an airline is LCC or GDS in SRDV Flight API?
You can identify the airline type by checking the IsLCC field in the Search API or FareQuote API response.
- If
"IsLCC": falseis returned, the airline is a GDS airline. To complete the booking, first call the Search, Farequote, Farerule, SSR, Seatmap, Hold API, followed by the Ticket API. - If
"IsLCC": trueis returned, the airline is an LCC. In this case, do not call the Hold API or Ticket API. Call the Search, Farequote, Farerule, SSR, Seatmap and Complete the booking by directly calling the TicketLCC API.