I have a question about SIN transit. I have transited (to SGN) twice recently but on one ticket. I want to buy SFO-SIN in C on UA & SIN-SGN on SQ in Y for a huge savings. The Singapore site says that transit passengers must be on one ticket.
Is this enforced? I have 3 hours so I can enter SIN, collect baggage & check in. However my luggage will be overweight if I do that.
Any comments on experiences appreciated. TIA.