Return fares are available at £15 day return from various London stations and £26.80 from Southend stations.
The ground is about a ten minute walk away from Gillingham railway station, which is served by trains from Cannon Street, Charing Cross, London Bridge, St. Pancras and Victoria with times to suit everybody, (though Victoria usually takes longer, but you could jump off at Rochester for the better pubs if you can scrounge an afternoon off), and still time for a pint after the game.
To find the services available on the day, go here;
www.nationalrail.co.uk
There is some fast services from London St. Pancras that are limited stops but charge more, make sure you get the right service, but at peak time it's not really worth the extra, but an example given below.
Examples - £15 return unless stated
St. Pancras 16.57 - Gillingham 17.46
Victoria 17.04 - Gillingham 18.08
Cannon Street 17.08 - Gillingham 17.55
London Bridge 17.12 - Gillingham 17.55
Charing Cross 17.17 - Gillingham 18.37
St. Pancras 18.25 - Gillingham 19.06 - £17.90 return
Victoria 18.27 - Gillingham 19.18
Getting back (part of £15 return unless stated)
There is a 21.50 if you walk out early as I did last season when the third went in, (the third in the league game that is), but for you more loyal supporters:
Gillingham 22.15 - Victoria 23.07
Gillingham 22.15 - St. Pancras 23.06 (part of £17.50 return only)
Gillingham 22.24 - London Bridge 23.35
Gillingham 23.15 - Victoria 00.07
Gillingham 23.36 - Victoria 00.38 (Last Train)
Add 90 minutes if travelling from central Southend and change at West Ham or Stratford or go to the end of the lines to jump on the tube.
Directions
Turn left out of the station and follow the road until you come to a crossroads. Go straight on into
Bottom Left: The stations the blue blob; Bottom Right: Priestfield Road and the ground.
Remember, it's in a Group Save area that can cut fares in half if four of you can travel together, as low as £7.50 each in this case, and any various travelcards will make it even cheaper.
To find out more, go here:
www.daysoutguide.co.uk/groupsave.aspx
(Thanks to www.footballgroundguide.com for stadium directions.)