My fault, I thought this was an international itinerary (I read "LGW" instead of "LGA"). Duh.
Yes, all fares are upgradeable within North America.
For transatlantic flights on US, you have to be booked in Q or higher to upgrade, and transatlantic upgrades are 30,000 miles each way for that fare class.
Just clarification. Have a great trip.
[This message has been edited by bmolotsk (edited 09-18-2003).]