Derek

Thanks. I posted on Dublin forum.

Do you know about flying home? We will be leaving London and flying to Chicago via Dublin.

You pass through immigration checks at Dublin as the UK and Ireland are part of the Common Travel Area. You pass through Customs at Edinburgh.

On the return you will probably do pre-clearance at Dublin so when you get off the plane in the US you just walk out the airport.

One hour is nowhere near enough- you may have to change terminal and queues at immigration can be 20 minutes long.

There seems to only be one flight per day from Chicago to Dublin. That gets to Dublin at 0900. There's only three Aer Lingus flights per day to EDI - 0640, 1305 & 1810 (some days there is also a flight at 1530) so where are you getting a flight one hour after the Chicago flight gets in?

There's a flight arriving at 05:15, leaving 06:40 from April onwards

Alanrow is correct. The flight I was looking at was with Aer Lingus. Looks like I need to plan on the 10 am flight from Dublin to Edinburgh rather than the 6:40 flight. Thanks for all the help.

Does the same apply coming home? We will be coming home from London to Chicago via Dublin.

If you mean immigration then you don't pass through immigration between UK and Ireland but you will do US preclearance at Dublin

Are you booking separate tickets? Very risky if so.