google flight explorer
 

And? Gives nothing for LHR-SFO for me. Seems worthless to me thus far.

Pretty cool
LHR- SFO worked for me

I am wondering if because I have the temerity to live outside the US and A that is will not let me search. I can get flights SFO-LHR, but not if I start with LHR-SFO.

like most things google it is a work in progress

Love it...

Try typle in a state, region or country instead of a specific city.

Then adjust your minimum days accordingly.

It's a really cool tool with a lot of possibilities for future growth.

Even more now that Google bought Fodors

Definitely beta. Type in London in the From box, all London, UK airports are unavailable. Might be worth a look when it grows up.

It's funny how this is an acceptable answer for a google product, with nary a concern voiced about this excuse, but if it was an Apple product there would be multiple threads of massive failure with pronouncements of imminent doom for the company. LOL

If you check the announcement it is mentioned that

I think it's about setting the right expectation - note that Google makes it clear that certain products are in beta. They made it clear in the announcement that it's for flights originating from the US and Canada.

Apple never done that and thus the expectation of something "revolutionary" that must be perfect on day one.

On the one hand, this is pretty cool.

On the other hand, I feel like Travelocity's old "Dream Maps" feature worked at least this well, back in the day.

(I also find it funny that the first place it offers for SFO to "Asia" is Beirut -- OK, it's not Damascus or Mogadishu, but it's sure not a spot I'd think of vacationing right now.)

I'm not aware that Google prevents users from searching elsewhere. Apple does its best to do just that, which is why there's a backlash when it comes up short.