We are 2 adults + 2 seventeen year olds (4 adults) traveling from Gatwick to Holborn tube station. Arriving on 22 December at 9:30 a.m. Planned to take Thameslink to St. Pancras, then tube to Holborn tube station. From what I can see, it looks like this will be 20 GBP x 4 = 80 GBP one way for the Thameslink portion. ( we will need roundtrip but for now this is 1 way info).
I'm frugal and I'm wondering if this is the best option...or if someone has another suggestion?
If this is the best option, can someone explain...and I dread asking this....confirming I buy one ticket for the Thameslink and then an Oyster card upon arrival at St Pancras (we plan to make good use of the Oyster card via tube/bus during our time in London). Is it cheaper to buy the Thameslink ticket in advance?
And, while I'm aggravating people with train ticket questions that seem so obvious when you know the answer....when I take the train from London to Salisbury for a day trip....I use national trains, which is a totally separate line/ticket, right?
Thanks to the experts for sharing their knowledge.