Translation:You have to go to the domestic airport.
No. Domestic airport specifically means that it is handling flights within the country only. Such an airport has no customs office. "Regional" just means things that are in the same area. A flight from Boston to Toronto might be considered regional, but it is not domestic. A flight from Seattle to Hawaii is domestic but definitely not regional.
If by "You'll have to" you mean "You will have to", then it seems to me that you are interpretting 要 as both "will" and "have to" at the same time. 要 can mean either of those things, but I don't believe it can mean both at the same time. However, Chinese does not always require time markers in a sentence. If 要 means "have to" then there are no time markers, and I believe it's possible for this sentence to apply to a future situation if spoken in certain contexts. So, perhaps your answer should be accepted as an alternative solution for that reason. If by "You'll have to" you mean "You all have to", then that is the wrong contraction. "You all" is contracted as "Y'all".