I’m talking about the .
The ITA Software Matrix is the closest thing travel has to a mainframe computer terminal. It is ugly. It is powerful. And it is the reason you haven't overpaid for a flight in the last decade.
"What is the absolute lowest possible fare between Point A and Point B, across every airline, every date, and every routing imaginable?" Here is why ITA changed the game.
Beyond the Search Box: Unpacking the Genius of the ITA Software Matrix
It is a search engine for inventory , not a travel agency. When you find a great fare, you have to copy the exact flight numbers and fare codes and go to the airline’s website or a third-party agent (like Orbitz) to book it.
Before the Matrix, if you wanted to know if it was cheaper to fly on a Tuesday vs. a Saturday, you had to run two separate searches. The old systems were "session-based"—they looked at one date at a time.
Want to fly from New York to London, but you don’t mind stopping in Reykjavik for 3 days? There’s a code for that. Want to force the search to avoid a specific airline (like Boeing 737 Max routes)? There’s a code for that. Want to find a "Hidden City" ticketing opportunity where getting off at the layover is cheaper than the direct flight?
Why? Because ITA (now Google) is a B2B software company. They provide the brain; they let Expedia and Kayak provide the checkout cart. With Google Flights becoming more user-friendly every year, is the classic ITA Matrix dead?