Hello -
We have a 10:20am flight out of Zurich to Heathrow, then on to the USA. We'll be staying in Lauterbrunnen. There's a 6am train that puts us at airport approx. 8:40am.
Will that be enough time to make flight? There is also a 5:30am train that gets us there at 8:15am. Could do that just in case we miss a connection.
tx