http://nerdbastards.com/wp-content/uploads/2015/01/speed-force.jpg

Hamm sometimes in comics flash can run faster then light ,many times it happened but as mathematical answer i will say

"Speed of light = 186,000 miles per second (thats seven times around the equator in a second)

Total distance flash travelled to bring one set of people to safety - 35 * 2 = 70 miles.
Therefore TOTAL distance travelled is - 70 * 250,000 people = 17,500,000 miles. (assuming he moved two people at once)
Time taken to do that was - 0.00001 microsecond (and 1 microsecond is 1 millionth of a second)

So time in seconds is - 0.00001 / 1,000,000 = 0.00000000001 seconds
So the speed, flash was travelling at was - 17,500,000 / 0.00000000001 = 1750000000000000000 miles per second.
So if the speed of light was 186,000 mile per second.
Flash was travelling at - 1750000000000000000 / 186000 = 9400000000000 times the speed of light.
Which is 9,400,000 million times the speed of light."

*but one obligation is in comics, in one issue said flash got speed of  13 trillion times faster than light


two answer you can choose

https://qph.ec.quoracdn.net/main-qimg-68976024936a55756bb8bcdfd9652749-c?convert_to_webp=true

https://qph.ec.quoracdn.net/main-qimg-68976024936a55756bb8bcdfd9652749-c?convert_to_webp=true

https://qph.ec.quoracdn.net/main-qimg-68976024936a55756bb8bcdfd9652749-c?convert_to_webp=true

https://qph.ec.quoracdn.net/main-qimg-104404c04c24b94dc2ce3ee348222583-c?convert_to_webp=true