Book a flight for your nephew and make sure he gets support.
Your 11-year old nephew from Dallas wants to visit you in Washington D.C. from around October 15 to 20. Use Google Flight to book a round-trip flight for him.
You want to avoid changing flights at an airport. The dates are a bit flexible, so that you can choose nearby dates according to the price. Purchase the most convenient ticket (of course without making an actual payment).
As your nephew is still a minor, you don't know if he can travel on his own. Look for information about this issue.
You want to know what happens if he misses his flight, because you know your sister can be a doddler. How do you proceed?
When was the last time you have booked a flight? How does your experience compare to Google Flight?