Steps to reproduce: 

1. create a flat world with cheats.
2. OPTIONAL: render_chunks to min, disable mob spawing, always Day, no weather cycle. no multiplayer.
3. run /give @p command_block
4. run /tp @p 10000 5 10000
5. build a platform around you(example 9x9, using red carpet or any block)
6. place a command_block near 10000 5 10000(2 or 3 blocks distance).
7. open command_block and WRITE >> /tp @p[r=10] -10000 5 -10000
8. set delay = 100   (run at first Tick must be DISABLED).
9. place a lever next to the command_block.
10. Set lever to ACTIVE ( you can use a RedstoneLamp to check it).
11. wait for the command_block delay.
12. Now you're in COORDS -10000 4 -10000
13. build a platform around you(example 9x9, using blue carpet, or any block)
14. place a command_block near -10000 5 -10000(2 or 3 bloks distance)
15. open command_block and WRITE >> /tp @p[r=10] 10000 5 10000
16. set delay = 100  (run at first Tick must be DISABLED).
17. place a lever next to the command_block.

CHECKUP: 

1. ACTIVE/DEACTIVE the lever to check if both command block are working.
2. Or use a WOOD/STONE button.

RUN: 

1. now you're in one of the platforms,let say RedCarpet.
2. Deactive the lever.
3. Set command_block to REPEAT.
4. Activate the lever.
5. now you're in the BlueCarpet platform.
6. Deactive the lever.
7. Set command_block to REPEAT.
8. Activate the lever.

note: 

since both command_blocks are in REPEAT mode you are teleported from RedCarpet to BlueCarpet and vice-versa.

Observed results 1:  

look down, you will be able to see only 1 platform, not both.

Now, Deactive the lever in the platform where you are. Wait for about 2-3 seconds(or 10, it doesn't matter).

Activate the lever.

    Observed result 2: 

The Player is teleported instantly, with No Delay.

It is as if the delay were zero.