Apparently a trip credit is what is left after you have used your flight credit. A flight credit is only for the passenger that it was booked under although the trip credit can be used for anyone. For instance, if I had gotten a flight credit, given it to the kallah and she used only part of the credit, the remainder of the credit could be used by someone else.
Unfortunately had to lose the ticket. It was a good try though so thank you.
On a separate note, I purchased tickets for the wedding for my in-laws through El Al via expedia. They were business tickets at almost $5000 apiece. My mother-in-law has dementia and will never fly again unfortunately. After hours of discussion Expedia refunded the ticket except for a $480 per ticket cancellation fee. We were very pleased with that!
My husband and I have tickets that we purchased from El Al for $3000 apiece. Unfortunately those have to be used within a year of booking and you cannot change class fares. They are business tickets and I doubt will be able to use them without adding significantly to them. Any suggestions appreciated.