Ask HN: How can I improve my Accelerator Pitch?

A couple of weeks ago we went online with our flight search, that is different from standard flight searches. We often find better and cheaper results.

However, when pitching our product to people we often get the message asking how we are different from Kayak and Skyscanner. I usually attach an example showing the price differences and the savings we conduct (https://tripdelta.com/results/SFO/LON/10-12-15/ vs. https://www.kayak.de/flights/SFO-LON/2015-12-10).

It seems hard to properly communicate the message.

But do you see any general advice on how to improve an Accelerator Pitch?

I would love to hear your thoughts...