score:7
For the life of me I could not come up with a single itinerary that will fly Miami to JFK then LaGuardia to Zurich.
So if this is the case there are 2 different itineraries in play then you will need to collect your luggage and re-check it at the next airport to your final destination, which has been discussed in many forms on this site already:
So if you need to transfer from airport to airport you will have to collect your luggage. Carry it to the Taxi $35-$50 + tip and at least an hour of your time then checking it for your next connection and so on.
Personally while $70 is not chump change is it really worth about 2 hours of your time?
ADDITIONAL INFO
Just found a way to create a connection with an airport transfer. There is also a rule listed in US-Canada Domestic Rules 205AA A.3.e which states:
Baggage will not be checked beyond a point at which the passenger is to transfer to a connecting flight, if that flight is scheduled to depart from an airport different from the one at which the passenger is scheduled to arrive.
So you will definitely have to pick it up. Hump it to a taxi then check it back in at the other airport and continue. Personally I prefer convenience.
Upvote:6
When you fly from the US to Europe, the bag could be checked through to its final destination except if you have an airport change e.g. from LGA to JFK or EWR. If you have an airport change, then the baggage label / ticket is not for the final destination.
It is generally not worth doing an airport change. First you have to pick your luggage up and then you are at the mercy of traffic and other problems.
When you fly from Europe back to the US, you'd have to pick your luggage up anyway in the first port of arrival to then recheck it. The label on the bag would already be the right one to Miami in your case except if you change airports (e.g. from JFK to LGA).