The card in question does not allow points transfers to other programs.
Points in the program can be redeemed for tickets on a variety of airlines.
Unfortunately, these tickets are generally capped at a specific dollar value.
So you can buy a domestic ticket for $250 without problem.
However, that's not what I use miles for -- and in general that's not what I believe miles are most valuable for.
* Last minute domestic tickets which would otherwise involve full fare. I've often spent 40k miles for a first class award when a coach ticket would have cost $2000.
* International business and first class awards. Fly to SYD in C for 90,000 miles instead of paying $7000.
* Upgrades -- until recently a domestic upgrade on United was only 10,000 miles. This meant that 10,000 miles was equivalent to the HK49s awarded to 1K flyers -- confirm a transcon in F at time of ticketing off of any fare. Sounds like a good deal to me! Unfortunately it's now 15,000 miles each way.

Similarly, international upgrades (on AA from any fare... on UA from
Ho
Me
Bo
Y fares..)
The Capital One card does not allow any of those things!
Please see:
Best Credit Card for Miles
Cheapest Credit Card with Miles
What is the best airline credit card deal?
And many others...
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More Room Throughout Coach: the Website of Free Miles and Free Markets