How far can a 777 glide without fuel?

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The Boeing 747 can glide about 17 times its height if no wind...
The 777 should be able to do about same -
From 11 km altitude, it could glide (no wind) about 187 km distance -
That would take about 20-25 minutes glide, no power, to sea level -

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Depending on its starting altitude, it could go somewhere between 500 feet and 150 miles.
But that's not the issue. Why do you imagine all the engines failed? There's no evidence for that.

Oh wait; just read your question again. Without fuel. Wildass guess, maybe 30 miles but it all depends on its altitude when it ran dry. But it would be darned near impossible to bring it into a controlled landing on an airstrip without fuel. This isn't a Piper Cub where it can just coast in like a kite. That's a big heavy airplane and with no engines, it would be coming down fast. Without power you can't really control it, let alone hit the runway in the right place at the right speed....Show more

With the right amount of wind from right direction and no PAX or fuel, it can make roughly 100 NM from FL430. However, if you are talking about MH370, I don't think it would go further than 40-45 nm, considering the conditions....Show more

It depends upon the altitude it starts from and the wind. From 35,000 feet, no wind, it's roughly 85 miles if the ideal glide speed is maintained within a knot or two. ....Show more

About 15 times as far as it is high.
So, that depends on the starting altitude....Show more