You need to make sure you pick a destination from the suggestion box (click on it), enter the number of days for each destination and click the '-' button if you're not using one of the destination fields. Sorry if that's a bit confusing, currently improving that so it's a little bit more lenient :)

EDIT: We're pushing out a fix now that should resolve this, you can now have empty fields for destinations and it'll just include the filled out ones.

I did pick destination boxes from the drop down each time, and I entered the number of days each time.

As a side question, what happens if I want to start in one place, and finish somewhere else? Suppose, for example, I want Paris -> Atlanta -> Sydney -> London : is that possible?

If this works properly and well I can see that I would not only use it, but would pay money for it, but at the moment, for me, it doesn't seem to be working.

FWIW, I'm well-known in my companies for breaking anything that people think is ready to go and suitable for deployment to muggles, so these teething problems are to be expected.

That's very bizarre that you got an error then! Could you try it again please, oh and make sure to set a date a bit into the future as otherwise might not have as many flights available.

Wonderful suggestion :) I'll make it so you can input a different final stop to you're starting point. We want to keep it free and potentially monetise via affiliate sales and show people how much we've saved them, perhaps some would be generous to donate 1% of the amount they saved? Who knows!

We'll definitely be fixing it up though, still a bit rough around the edges haha.

Thanks Colin, we have a chat support on there too so we can see what's going on but definitely working now :)

The other question is:

What does this do that Google Flights doesn't do?

I haven't yet seen what it is that makes this different - I feel like I'm missing something.

If you're flying to multiple destinations it matters which destination you visit first, which one second and so forth. SkySave tells you which route is the cheapest. For example, it can be a lot cheaper to fly London -> New York -> Miami -> Los Angeles -> London than if you were to go to LA first and then Miami. Does that make more sense?

OK, that really wasn't clear, so here are some specific suggestions:

The video under the white text often makes it difficult to read the catchphrase. I'd suggest editing the video to reduce the brightness by 60% (No doubt others will disagree);

The text at the top does not, to me, communicate this idea that you are choosing multiple destinations, and that the site will try all the orderings to find the optimal itinerary;

It says:

Discover the cheapest route to fly for your next holiday

You are using the word "route" in a way that doesn't communicate to me the idea you've mentioned above;

It says:

If you're visiting multiple destinations it can be on average 30% cheaper to fly a specific route as opposed to others

Again, you're using the word "route" in a very odd way.

So, concrete suggestion to highlight the problem, I'd say something like:

You choose the places to visit - we'll arrange your itinerary to minimise the costs.

I found it hard to put it succinctly but I quite like your description. Might use that instead!

I'll revisit in a day or two, and if I get the error again I'll take a screenshot so you know what I did.

Good luck ...