Hi All. My son and I have found a tour we like the look of but are struggling to find the best flights from UK (we live in Birmingham but can travel to London/Manchester) . The tour starts in Hanoi and ends in Siem Reap. Airlines that are good for one way seem bad for the other. Is there a hub that links with both places or do we need to fly from Siem Reap to Ho Chi Min or something? Any suggestions gratefully received.