New Europe Upgrade Buffet Now Through Sept. 17: What Would You Like? Business Class for Less Than Coach Using Miles, a Two-for-One, or a $1,432 Cash Outlay Round-trip?

• Get two tickets for less than the price of one on Delta, or

• Get Business Class for 11,250 fewer miles than American and United charge for coach.

With an American Express Rewards 40% transfer bonus (through Sept. 17, for details go here), you can knock 28% off a Business Class mileage award on Iberia, Spain’s flagship carrier.

How good is the deal? Just compare the Iberia rate against those of the three major U.S. carriers.