查船票的时候看到的，虽然我本来要找8月的还没看到优惠，
不过就分享给需要的人囉:)
The sea does wonders!
The time has come to midsummer.
Whether you will enjoy a vacation,
or sit in an office desk,
a mini holiday over the bay to be paid in advance in each case.
The passenger ticket to Helsinki is 10 € / way .
Driving to the price of € 15 / one way .
The offer is valid until 07.31.2016.
资讯出处
http://www.vikingline.ee/laevareisid/liinireisid/tallinn-helsingi/emeri