I am a US citizen and am currently in Barcelona.  I'm looking for
cheap airfare back home for April 29.  The date might be flexible
within a few days before or after.  When I flew over here, I got a
one-way ticket for around $280 including all taxes and fees through
cheaptickets.com.  However, almost all the discount airline sites (STA
travel, studentuniverse, expedia, travelocity, etc.) do not sell
tickets originating in Europe and going to the US.  I have found some
round trip tickets from BOS to BCN with a return on April 29th for the
mid $500s, yet any one way ticket I've found from BCN to BOS is much
more expensive than that.  I'm looking for sites that search for cheap
airfare that allow a one way ticket originating in Europe.  So far, I
have found cheaptickets.com and faremax.com which allow this search
option, but neither have tickets that are very resonably priced. 
Could you please find some other sites that allow this search?  Also,
if you can find any airfare that is cheaper than $400 (including taxes
and fees), I'll give an additional $15 tip.

Thanks.

Since a round-trip ticket is cheaper than one-way, have you thought
about buying a round-trip ticket and then never using the return part
of the ticket?  You'd just have to be sure to use the first leg and
skip the return.  If you skip the first leg, the return part would be
automatically canceled.

I had thought about that, but it has the same problem with the one way
ticket.  Most of the sites I've found don't let you chose flights that
originate in Europe, whether it's one way or both ways.  I didn't know
that the return part would be automatically cancelled if I skipped the
flight there.  That's a good thing to know.

Hi barcelona boy 

i hope you still havent booked yet.
try 
http://www.air-hitch.org/
 from madrid to the N.Y.C, that should come closer to what you want to pay.
with a kind of stand by

buses to madrid are cheap as well: eg
http://www.alsa.es/portal/index.asp?lang=en
or trains to madrid are faster but a bit more expensive

enyou your time overhere and be ALWAYS aware of the pickpockets

greetings researchbcn 
would be nice having a feedback whether this works out as i want to go
there as well ;-)

Thanks, I'll check this out.  I found another company similar to it,
www.airtech.com that I was thinking of using, but this one could be a
possibility as well.  I'm not leaving until the end of April, but when
I go, I'll post and let you know how well it worked.

I ended up using AirHitch.  Worked great and saved a lot of money. 
The customer service before I bought a voucher was horrendous, but
once it was bought, it was infinately better.