Thanks, guys.
I'm tentatively planning to fly to Moscow on the 15th.
BC, good point on the FF miles. I have about 75k miles with Lufthansa, but since it would be a crapshoot to get my fiancee on the same return flight, I'd have to use my FF miles to buy a one-way ticket. Of course with the airline's draconian rules, I'll consume 47k for a round-trip ticket and 35k for a one-way ticket. And I'll have to pay $250 to cover taxes.
The cheapest one-way flight I found was $460.
I'm thinking of splurging on the one-way flight to Moscow and using all my miles to fly business class... I'm starting to wonder if it's even worth being part of a FF program, that I should simply find the lowest fare and to heck with trying to accumulate enough points for a free ride.