David,
Unfortunately there are no more tickets available for the date you’re searching.
Tickets become available 60 days in advance, and they sell out fast, especially during high season.
Here’s the information from the official website:
The desired visit date is not available, what should I do?
Certain days (weekends, days during peak season between July and August) are in high demand and we sell out quickly, especially for e-tickets for the top floor, which are the most popular. If you are flexible, select another date that is shown as available. The dates marked in orange indicate that the last tickets are available. Lined out or grayed out dates are no longer available. If there is no more online availability, note that tickets to visit the Eiffel Tower are also sold on site at the ticket offices at the monument.
Regardless, we sell our tickets online up to 60 days in advance (for lift tickets) and 14 days in advance (for stairs tickets to second floor). If you can, plan your visit well in advance, so you will have the choice of date, destination and time.
Your wife and her friend have some options:
- Arrive early and buy tickets at the Eiffel Tower (possible long queue)
- The queue for taking the stairs may be shorter.
- Book a tour that includes going up the ET, but make sure the tour takes them up to the summit, if that’s where they want to go, as some tours only go up to the second level.
Wishing them a great trip!