Big Planes at IAD

I will be in Washington D.C. next week, and I plan to do some spotting. I have been using the flight finder tool on FA and have figured out that I might be able to see the A380 and 747-8. Do they get other 747’s or 787’s? Thanks!

How does that show me every aircraft for the entire day though?

UA moved it’s 747 operation to SFO earlier this year so unless it is a special charter or freighter, no other 747 arriving IAD except the LH 748.

I don’t see any 788 service except if ET subs it in place of a 772.

Other heavies at IAD: A300F A310F A332 A333 A343 A346 B753 B763 B764 B772 B773 MD10F MD11F