If you need to get from the Eurostar to Luton Airport, you are in luck. Direct trains operate from the same station that the Eurostar arrives at, making it easy to transfer and continue your journey. Buses also operate on this route, but they are only a good option if you are on a very tight budget.
From the Eurostar, you can walk to the domestic terminal in St Pancras Station. From there, trains to Luton Airport Parkway train station run all throughout the day. The journey takes 21 to 55 minutes, depending on whether you catch an express train or one that stops at multiple stations en route.
Single tickets for trains from London to Luton Airport Parkway cost £13.00 for standard class and £20.00 for first class. From the train station, you will need to take a bus to the airport.
Regular shuttles run from Luton Airport Parkway train station to Luton Airport. They run every 10 minutes from 5:00 to 0:00, and after midnight they and serve each train calling at Luton Airport Parkway. The journey takes five minutes.
The majority of train tickets from St Pancras to Luton Airport Parkway include the price of the Luton Airport shuttle. If yours does not, the shuttle costs £1.50 for a single.
If you do not want to take the train, there are also buses from London to Luton Airport. However, because they don’t depart from near St Pancras train station, it is faster and easier to take the train.
Additionally, by the time you pay to get to the bus stop and then pay for your bus ticket, the price is not much less than the train (and sometimes more). That said, if you do want to take a bus, you can see the various options here.