Oh the $1400 was for the person asking for Dec 15th to Dec 18th. There are still lots of $600-700 fares, at least from Ottawa, for the cherry blossom season in 2018. I managed to snag mine for $705 for March 28th-April 18th. I wanted to leave more for the 30th and come back on the 20th but it was a fair bit more expensive.
EDIT: Looks like flights from Pearson and YOW are back up over $1k for the March/April timeframe