They do have a baggage agreement as I fly United out of Denver and have checked my bag to Manado 3 times.
When leaving Manado check your bag all the way thru to Denver unless of course you are planning to stay in Singapore for a few days. If you are just staying one night check it thru and make sure you have what you need in your carry on. You will have to clear customs at your first port of entry into the US but then it's easy to recheck and you won't have to pay for bags.
When leaving Manado check your bag all the way thru to Denver unless of course you are planning to stay in Singapore for a few days. If you are just staying one night check it thru and make sure you have what you need in your carry on. You will have to clear customs at your first port of entry into the US but then it's easy to recheck and you won't have to pay for bags.