Flying to Tallinn

We have to Fly America, and that's OK with me. It's a bit tricky though. If you use Expedia for example, you can get from St. Louis to Tallinn for ~$1,000, or maybe to Helsinki for $800 (the ferry is about $60 round trip). But that's on SAS or Lufthansa and I need an American flagged carrier. American, Delta, United all list fares of about $2,000 to Tallinn, or higher. Continental says $900 to Helsinki or Stockholm, but you can't get a fare all the way to Tallinn. SO, I bought 4 round trip tickets to Stockholm on Continental for $900 each. It's only $200 each for round trip airfare to Tallinn from Stockholm. So for the minor inconvenience of picking up our baggage and checking right back in on another airline, we save about $900 each. Since we go through customs in Stockholm anyway, it's not a big deal. Why is it so difficult to work out travel?

Tickets purchased, don't use onetravel.com

I bought the tickets, we're leaving St. Louis on Friday the 15th of January. I won't ever try to use onetravel.com again. Yesterday I booked 4 tickets on Continental, through Copenhagen, to Tallinn. In the middle of the night I got an e-mail stating that because of the short connection times they had to change the flights to Lufthansa, and it would be $700 more. Never mind that they had advertised the flights, now it's too short. On the phone I told them it wasn't too short, if I went to the Continental website I could pull up the identical itinerary as far as Copenhagen. Then they said it was the high season, all sold out. I said "expletive! It's 2 weeks after the holidays, that's not the high season, and I can see available tickets on the Continental website." The biggest issue of all is that I went from an American flagged carrier to a German one, so it was not acceptable. Finally they agreed to cancel the tickets without any cost to me. No confirmation yet, but they have not tried to charge anything to my credit card, and I called the credit card company and told them I'd be disputing any charges from onetravel, so I think I am safe. I'll post the actual ticketing process in later.