June is not the best time for Myanmar as it is a bit hot and the monsoon season is going to start soon after.

Air travel with Bagan Air or Mandalay Air in economy is even better than on US carriers. The airports are a little shabby but if you have been in other third-world country then you will feels right at home.

Long train travel in Myanmar is not for the faint of heart (India general carriage comes to mind). Bus journey are also not recommended due to really bad road conditions. For short jaunts <> 3 hours they are tolerable.

Yangon -> Mandalay: You would want to fly this route. It is about 2 hours flying time. The Mandalay Air was flying twice daily when I was there in Nov 2004.

Mandalay is good for about 1-2 day as you can take a day trip to see the U-Bein bridge.

Mandalay -> Bagan: Best if you take the SLOW ferry. It will allow you to relax and enjoy the idyllic life of Myanmar famous Irrawaddy river.

Bagan: Give yourself at least 2 days, 3 if you want to see mount Popa. This is the crowning jewel of Myanmar. With Angkor in Cambodia and Borobodur in Indonesia, they are the 3 most important Buddhism complexes in the world. Sunrise in Bagan is amazingly beautiful.

Yangoon: 2 days is quite enough for me here. Not many thing to see here except for the Schwedagon. You would want to take a train trip on the Yangoon loop. It takes about 2 hours.

I have a few of pictures on my Nov 2004 trip here and more here