Rail travel from London Charing Cross.
Airports by rail, with Holiday Extras, who I work for. I am not earning a fee on this (damn).
To take advantage of these prices you will need to prove you are not a business traveller, on the way to the airport, so you will need to give either your flight numbers or your holiday booking reference. I don't think you will need to provide this when you arrive at charing-cross station but you may be asked to provide them on your travels from charing-cross station to the airport.
Going to the airport on the train is great, you can sleep, read a book (even at night), play a game
make sure you leave enough time to get to the airport early enough to eat, shop etc, so check the times of trains from charing-cross station before you go. If you have time to kill at the airport you can always read or play travel scrabble
You can get a train tickets this way from charing-cross station to Gatwick, Luton, Stansted, Manchester, Birmingham, Glasgow, and Newcastle. Holiday Extras don't sell train tickets from charing-cross station to Heathrow and some other airports, because you can't get one train ticket to get you all the way there, boo! Damn you Heathrow Express!
See also
Or maybe you meant
