These sentences are similar, but slightly different.
"WOULD" is used as a condition of something in the past tense.
"If I HAD a lot of money, I WOULD buy a house."
"What WOULD you do if you TRAVELLED to Canada?"
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"WILL" is used as a condition of something in the present tense.
"If I HAVE a lot of money, I WILL buy a house."
"What WILL you do if you TRAVEL to Canada?"
Hope that helps!