If you are taking an international honeymoon and do not already have a passport, I highly recommend that you go get one before July 13th. Fees are being raised a good bit.
For a first time passport application, fees are going up from $100 to $135. For the passport card, it's going up from $45 to $55.
If you need to renew your passport, fees are going up from $75 to $110.
If you would like to read up more on the fees, head on over to this link.
