Going to Vietnam

[hotmit24]

This forum is very helpful. I read all the posts, and felt like family here.
Can you guys help me? I want to go back to Vietnam , Hanoi, this summer. However, I want a ticket open 1 year, and the price I can find in this website is around 1367$. For a student, it is extremely expensive. I am looking for something cheaper than that, but seems like this is the cheapest offer I can find. I wonder if I get the promo code, or buy in withing the Saint-Patrick promotions, can I get the discount in this price? Anyone can give me advices please? This is the first time I check SU, and I don't know about the reliability, but it seems has a good reputation. I never bought my ticket, international flight through website, so I need some confirmation.
Thanks again for your attention.