I'd like to suggest a slightly different approach with that 401(k): roll it into a rollover IRA at Vanguard; they can help you with this process.
If you decide you'd like to pay the taxes on it this year and convert it to a Roth, you can do so - and, as long as you don't use money from the account to pay the conversion tax, you don't pay the 10% early withdrawal penalty. This is effectively a cheaper way to get the same money into the Roth IRA.
As a bonus, the money converted from a pre-tax account to a Roth doesn't count towards that year's contributions. This will allow OP to put $5500 plus the value of this 401(k) into a Roth this year, if he or she can afford to do so.
By the way, each of those accounts is at least $1000, which can be used for a target date fund at Vanguard, at least as a holding until they're combined. Vanguard can help you over the phone to overcome the problems with minimum initial balance requirements when you are moving multiple small accounts in.