Originally Posted by terockwo

Wow, this thread is all over the place. I just had another example for the OP. I was looking to buy a ticket ~ 24 hours in advance flying from DAY to DCA with US Airways. The cheapest flight I could find was $495. Ouch.

I hesitated going up to Boston for the weekend instead of DC. I looked up itineraries for DAY to BOS & found a US Airways routing for $182. It was much to my surprise when I realized that the DAY - BOS routing was actually DAY-DCA-BOS. I looked closer & realized it was actually the exact same flight DAY-DCA as the $495 one.

Summary:
DAY-DCA --$495
DAY-DCA-BOS --$182 (same flight & fare class as above for DAY-DCA)

Too bad they were missing a passenger DCA-BOS that day...