I´m traveling for 3 days can I break fast?

Salam alikom I´m sunnit, I´m traveling for 3 days : Day 1 : flight start at 2pm and finish at 9pm Day 2 : do exhibition in destination country witch is very tiring ( standing from 9am to 6pm with crowd...ect) Day 3 : coming back flight start at 7pm and finish at 5am the next day on day 4 Wich day can I break the fast? and if I break it can I feed a miskin instead of fasting again? Barak ALLAH fikom

Dear Brother / Sister,

Such a distance is regarded as a journey and it is permissible for the traveller (musafir) to break his fast in Ramadan. But you have to make up that day; 

"if anyone is ill, or on a journey, the prescribed period (should be made up) by days later. Allah intends every facility for you He does not want to put you to difficulties." (al-Baqarah 2:185)

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