Trains from Heathrow Terminal 3 to London Kings Cross from $19.88*

Arriving in London Kings Cross

Every day, up to 106 train depart from Heathrow Terminal 3 and arrive in London Kings Cross, with the shortest journey taking 56m minutes.

Book cheap train tickets from Heathrow Terminal 3 to London Kings Cross

It doesn’t need to be difficult to find cheap train tickets from Heathrow Terminal 3 to London Kings Cross. If you know where to look and how to take advantage of available discounts and travel options, then saving money with Trip.com becomes second nature. Here are some of our top tips to help you save money on your train travel.

Network Railcard for South East England

To further enhance your savings on train travel in South East England, consider obtaining a Network Railcard. For a nominal annual fee, this railcard allows you to save 1/3 on most fares, including routes to and from London. Whether you're purchasing standard or off-peak tickets, the Railcard proves to be highly advantageous for frequent travelers within this region.

Get 1/3 off with a Railcard

Various Railcards are available for different groups and can save you up to 1/3 on fares from Heathrow Terminal 3 to London Kings Cross. You can choose the 16–25 Railcard or Senior Railcard based on your age. Additionally, the Family & Friends Railcard or Two Together Railcard are good options for group travel.

Book in advance to save an average of 61%

Did you know that purchasing Advance Tickets can significantly reduce your travel expenses? On average, these tickets can save you an impressive 61% on fares. The best part is that the earlier you book them, the greater the savings. It's recommended to secure your Advance Tickets as soon as possible, ideally up to 12 weeks in advance. By doing so, you'll not only enjoy substantial discounts but also have peace of mind knowing that you've secured the most affordable option for your journey from Heathrow Terminal 3 to London Kings Cross.