Search, book & sell flights through our Southwest Airlines API

Southwest Airlines is the world's largest low-cost carrier. It currently flies to 101 destinations in 11 countries around the world, and its main hubs are located in 11 different cities. The Duffel Flights API is built using NDC from the ground up and allows you to search, book and sell flights from Southwest Airlines along with 20+ other airlines through a single integration.


North America





The future of flexibility

Supported API features

Search and Book Flights



New York

Los Angeles


Search & Book

Search for flights from Southwest Airlines and more than 20 other airlines with real-time pricing and availability.


Cancel & Refund

Make it easy for your customers to cancel bookings and get a timely refund without having to bounce between Southwest Airlines and agents.


Paid Extras

Services like priority boarding are coming soon.

Docs coming soon



Plans can change. When they do, make it easy for your customer to do everything from updating their departure time, to switching origin/destination, and more coming soon.


Frequently Asked Questions

Haven’t found what you’re looking for? Try our API Documentation or Contact us.

What features are available on Southwest Airlines through the Duffel API?

With Duffel, you can search, book, and manage flights, including processing post booking cancellations and refunds. We also have a changes API coming soon that will enable you to change your Southwest Airlines flights.

How does the Duffel API compare to Southwest Airlines's API?

The Southwest Airlines API offers similar functionality to Duffel, but only allows you to access content from Southwest Airlines. If you want to offer content from other airlines, you would then need to integrate each individual airline's API, a process that is costly and time consuming. With Duffel, you integrate once, and get access to a network of 20+ of the world's leading airlines with just a single integration.

Duffel was also built with the developer in mind and offers simple, composable APIs, comprehensive documentation, and a robust testing environment. This means an integration takes minutes, not months. Check out our API Documentation here.