Of course you do. If you are going overseas or in another country you need a passport or you will be put into Immigration
Usually a form of photographic identification, such as a full drivers license. You should always check with your airline prior to travel as rules may vary.
Yes you need a valid passport to fly from Glasgow to Spain.
Glasgow only has two airports. However, the flight from London to Glasgow could be from Heathrow, Gatwick, Luton or Stansted.
3 hours from heathrow, 2 hours from glasgow,
Shortest time 1 hour 20 minutes
There are no direct flights between Glasgow and Mexico. Common connections include London and Newark (USA), meaning your flight may take from 15 hours (Glasgow - London - Mexico City) up to 30 hours or more (Glasgow - London - Chicago - Mexico City).
There are no direct flights between Glasgow and Los Angeles. You would have to change, either in London or a US hub.
Three to three and half hours, it will be much longer if you stop in Paris or London.
A passport is still needed when traveling between the UK (Glasgow) and European Union Schengen countries (Berlin).
Not directly as Eastbourne does not have an airport. You can fly from Glasgow to Gatwick then get on the train direct to Eastbourne.
No - but some form of photo - ID is essential
* KLM fly to/from: Aberdeen, Birmingham, Cardiff, Durham Tees Valley, Edinburgh, Glasgow, London (Heathrow + City), Manchester, Newcastle, Norwich. * EasyJet fly to/from: Belfast, Bristol, Edinburgh, Liverpool, London (Gatwick, Luton and Stansted) * Aer Lingus fly to/from: Belfast * BMI fly to/from: Aberdeen, London (Heathrow) * bmibaby fly to/from: Birmingham, Cardiff, East Midlands * British Airways fly to/from: London (Heathrow. Gatwick and City) * Flybe fly to/from: Exeter, Southampton
If you're walking it could take several weeks but if you fly it will be about 1 hour.