Thanks for this, I've just looked and priced up a ticket with BA that would be far cheaper. Infact it's also premier class.
Do I have to fly back to Dublin or can I after I'm in tue US tell them I've decided to stay at London a few days?
I'm guessing I have to fly from London to Dublin on the way back too, which is a shame as we live just over an hour from the airport.
Whatever you do, never let the airline know your not willing to take a flight
If you tell them you want to stay a few days in london, they'll say okay, and rebill you for a multi city plus amendment feesfees.
The question you ask is highly controversial.
Not taking a flight is not a crime but purposedly booking a flight with the intent of droping the last leg is called hidden city ticketing. It's a breach of contract of carriage and the airline would have every right to rebill you for your ''real'' itineraryitinerary. Actually a dub-mco-lhr is more expensive than a dub-mco-dub. So if the airline finds out you've booked a return to/from dublin to avoid paying for your real itinerary, it's considered a breach of contract and subject to penalty. (Now the airlines don't rebill passengers ... yet. But just because they don't do it now doesn't mean they can't. In fact it's highly possible that they will in the future)
If you decide to go that way it would only work if your flight from mco lands at gatwick and the flight to dublin takes off from heathrow, or the other way around.
The change of airports means you need to collect your luggage in london. Otherwise your checked bags will go directly to dublin. Airlines no longer short check luggage
The only way around this is not checking any bag.
The next catch is with irregular operations. When you book a plane ticket you have a contract with the airline. This contract says that the airline agrees to transport you from A to B and back. What happens if your mco-london is cancelled or delayed ? Well the airline can rebook you on an alternate route, or with a partner airline, and you'd end up flying orlando-new york-dublin (for example), never stopping in londonlondon. You'd be stranded in dublin needing to pay for a very expensive one way flight to london
The layover airport is never guaranteed. The only thing that's guaranteed is your point of origin and your point of destination, anything in between can change.
I think this pretty much covers it.
Many passengers use this ploy and be ready for heated debate between those who say it's ok and those who say it's not.
My point here is not to condone or condemn that type of booking but merely stating the possible issues.
Whatever you do is only yours to decide