1. 03+ Corollas have 5x100 bolt pattern (except 09+ XRS, which has 5x114.3), I believe your 06 Accord has 5x114.3?
2. Even if it is 5x100, Toyota wheels have smaller centre bores than Hondas anyway, unless you have a multi fit rim, the centre bore won't fit on the hub.
3. 15" may not clear the brake calipers anyway.
If your winter tires are still in great shape, just sell them, you should get a very good price for them.