If you can not find any suitable oneway-fares, have a look to bbok a retun flight.
on 21-OCT and a return minimum a week later (play with dates a bit).
Assuming you are a U.S.-citizen, you will not get into trouble with the INS if you let your return segment sinply pass (make it a no-show). Might be the cheaper way to get home ...
A quick search for a return trip (outbound on 21-OCT, return 28-OCT) got a quote of 635 EUR on BA
/AA via LHR
-- Second option: CO
for around 725 EUR.
A standard oneway flight is quoted around 950 EUR on BD
/UA via LHR
, so at least from the quotes I get, its 300+ EUR more expensive.
Switching to TPA
instead of MCO
apparently makes no sense fare-wise.
Another option, but to RSW
, not MCO
Two oneway segments:
1. Roundtrip OSL
(21-OCT / fiktive return on 28-OCT): on LH
3159 0955-1145h @ 130 EUR
2. Oneway DUS
AB1908 1340-1810h @ 309 EUR
Total: ca. 440 EUR.
Carpe diem ! Life is too short to waste your time ! Keep in mind, that today is the first day of the rest of your life !