I'm not going to get my ex girlfriend a direct flight
Why aren't you going to get her a direct flight?
I didn't want to interrupt my walk which was about an hour long.
If she's your ex then there is no reason to get her a direct flight, you don't have to go out of your way to help.
I want to get her a direct flight because I know that she can't afford it.
While it's kind of you to consider your ex-girlfriend's needs. You should remember that you are not obligated to help her and it essential that you make sure she is not using your history to take advantage of your kindness.