Ollie didn't buy that Mia wanted to learn to fly a plane just because it was cool and she really wanted to. Mia didn't come up with these ideas out of nowhere. There was more to it. He was certain. She just wasn't ready to tell him the real reason yet.
"You don't give Hal enough credit," Ollie told his son. He understood why Connor and Mia had that impression of Hal, but it didn't do Hal justice. Hal was capable of being responsible. He was a Green Lantern. And --
Ollie would never forget this -- Hal had been more responsible than he was when they'd found Speedy on drugs.
Hal and Dinah.
They'd been there for his son when he hadn't. When he'd turned his back on him.
There was no one Ollie would trust more to teach Mia how to fly a plane.
Oliver wanted to hear Mia and Connor argue her case before saying yes, though. He felt it only fair after what she'd put him through. He kept his face perfectly straight, his tone deadpan. Only the whiskers at the corners of his mouth twitched a little. "Go on, Speedy. Tell me why it would be useful for the three of us to have an Arrowplane," he said.