Just hours ago, a commander of separatist forces in Ukraine handed over the two black boxes from Malaysia airlines flight 17. The result of an agreement between rebel leaders and Malaysian officials.... See More
Just hours ago, a commander of separatist forces in Ukraine handed over the two black boxes from Malaysia airlines flight 17. The result of an agreement between rebel leaders and Malaysian officials. The Malaysian prime minister has promised that inspect investigators will be given safe access to the debris site. While they're searching for clues about exactly what happened, one man is looking back on how lucky he was to have stayed off the flight, the second doomed Malaysia airlines flight he narrowly avoided. Here's ABC's David Wright. Reporter: A wise man once said luck is a very thin wire between survival and disaster. 298 souls this past week, that wire suddenly snapped, at 33,000 feet. I came all the way from Holland. Reporter: 29-year-old maarten de jonge would have easily been one of them. A lot of people died in the crash. And I feel very sorry for the passengers and their families. But I'm very lucky to be alive. Reporter: Flying back from Holland, where he was born, to Malaysia, where he lives now, and competes as a professional cyclist, de jonge had a ticket on Malaysian air flight 17. But it was expensive. More than $1,300. And I saw another flight on Sunday. It was one place left. So, yeah, I decided to buy another ticket. Reporter: So, that decision to save a little money, saved your life. Yes. Unbelievable. Reporter: Even more unbelievable is the fact that he has been through this before. So, you have been twice lucky? Yes. A couple of months ago, with flight 370, it was the same story. Reporter: That's right. He was supposed to be on Malaysian flight 370. The Boeing 777 that disappeared with 239 people onboard. Last March, he and his teammates were flying off to compete in the tour de Taiwan. They decided not to take mh-370 to avoid a lengthy layover. Instead, they took a different flight a half an hour later, arriving safely the night that mh-370 vanished without a trace. How do you fathom that? I mean, it's a remarkable story. Yeah. Just luck, yeah. Reporter: Flying home today, he took Malaysian airlines. He heard some of the other passengers talking about what had happened but didn't share his story with them. He's tired and shaken. And just wants to get on with his life. Very lucky. Very lucky. Very, very lucky. Reporter: A stroke of luck. That thin wire between survival and disaster. Martin de jonge, it came down to saving 300 euros. It was a good decision to take the cheaper flight. Reporter: Do you believe in fate? In god? I believe in god, yeah. Yeah. Reporter: Somebody's watching out for you. Yeah. Must be. Reporter: I'm David Wright for "Nightline," in Malaysia. Amazing story. Tomorrow night, hooray ram
This transcript has been automatically generated and may not be 100% accurate.