Booking two one-way flights...problems?

GramChop

Senior Insider
What, if any, issues might one encounter if two one-way flights are booked as opposed to booking a round trip itinerary. For example, a round trip from AUS-SXM is showing approximately $900 (multiple airlines) for my desired times while two one-way flights (AUS-SXM / SXM-AUS) is showing $600 (also multiple airlines) for the same desired times.

Advice, svp!

Merci!
 
You may be questioned closer on your outbound flight, and be required to show proof of ongoing or return tickets. That's about it.
 
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