I did some results on my quick 100 block dashes:

Speed Timings:
Walk:

1: 23 seconds
5: 14 seconds
10: 9 seconds
​

Sprint:

1: 20 seconds
5: 12 seconds
10: 8 seconds

​

Sprint & jumping:

1: 15 seconds
5: 12.5 seconds
10: 11 seconds
(This may be slower than sprinting, as jumping isn't effected by /speed, so jumping may slow you down.)
​

Fly:

1: 9 seconds
5: 5 seconds
10: 4 seconds
​

If you are looking for anymore, I could add them

 

This is really interesting. Would you mind adding a speed 5 as well?

 

Done ^_^.
Also added normal walk speeds as I feel those are a good base line.

 

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with speed 2 or higher, its faster not to jump because you loose the speed effect while you're jumping. Speed 1 and regular walking/sprinting its better to sprint-jump

 

Fly is amazing. I highly recommend it.

 

Which ones are normal speeds without /speed?

 

Could you add fly and sprinting?

 

Speed 1 is the default Minecraft speed.

If you mean sprinting while flying, I'll give that a try the next time I am online, and will add it to my list if the time differs.

 

One thing to know about flying is that it never makes you hungry to fly even at speed 10. However, when you are walking, speed makes it so that you get hungry faster.

 

If you're sprinting while flying, it takes it down super fast :/

 

I've never become hungry while I was flying. Though, I haven't tried sprinting while flying. I just change my fly speed. You pretty much can't really fly speed 10 because the chunks won't load fast enough.