ESO Travel Guidelines for Visiting Astronomers : your observing mission in Chile

You have been granted observing time at an ESO telescope in Visitor Mode: congratulations! In order to prepare your trip in the best possible way and receive adequate support for your journey to Chile, please take a moment to read the following guidelines and instructions.

The “VATravel” office (vatravel@eso.org) located at the ESO Headquarters in Garching is your partner for all the logistical aspects related to your trip to Chile. If you have a question about the preparation for your trip, please feel free to contact us and we will guide you.

When you plan your trip to Chile, the following general rules apply:

  • Only the PI or one of the CO-Is of an observing proposal can conduct the observations.
  • Only one observer per run is accepted in Paranal and La Silla.
  • You have to follow the requirements specified in the tab below entitled "Your journey to the observatory".

Any changes from the points above require a prior approval by the observatories, for example if you wish to have more than one observer for your run. Please contact us (vatravel@eso.org) for further information.


When getting ready for your trip, here is what you should do first.

1. Fill out the Travel Form

Two months before your observing run: as a Visiting Astronomer traveling to one of the ESO Observatory sites, your first task is to fill out our online Travel Form.

In order to guarantee that all the required arrangements can be made in due time, it is very important that you send your Travel Form at least two months before the start of your observing run.

Depending on your citizenship, you may require a visa to enter Chile (if you are unsure, please contact the administration of your country). In such a case, you can specify this information on your travel form, and we will send you an official letter certifying your status as Visiting Astronomer at ESO for the time of the stay related to the run.

2. Confirm your flights to/from Chile (if you are not based in Chile)

If your flights to/from Chile are financially funded by ESO, we will book the most economical international flight for you OR you can book your own international flights, and ESO will reimburse you up to an amount based on the best rates available to/from Chile and according to the run schedule. 

We will only issue your international tickets after your approval. Please confirm your flights rapidly when you receive our notification while your Travel Form is being processed.

If your mission is not funded by ESO, please book your flights to Chile and let us know of your travel details in the Travel Form.

Generally, the international flight should land in Chile 72 hours before the observing run starts since it allows one night of rest at the ESO Guesthouse in Santiago. Usually, the departure from Chile is one day after the end of your observing run, which allows you to spend one night of rest at the Guesthouse.

Note: Talks at ESO Santiago

If you can stay an extra day in Santiago and give a talk at our Headquarters to meet ESO Chile staff astronomers, please contact the ESO Colloquium coordinators in Santiago at colloquia@eso.org. Your talk would be very welcome!

IMPORTANT: Remember to arrange your talk before you submit your travel form. Your international flights can be affected, and we will not pay any fee to change your itinerary!