So you booked a route via Renens, and the IC5 service, right?
Those trains are still running, but the IC5 will not call at Zurich Airport because of the works, so you would need to change to another train at Zurich HB if you were to take that train anyway.
That however results in that route no longer being the quickest, and the SBB planner stubbornly will find you the fastest route. And because of the changes in Zurich the quickest route suddenly goes via Visp, not Renens.
What you can do is:
- Take the trains you originally planned to take. Leave at 11:35 in the direction of Geneva, change to the IC5 in Renens, and then again in Zurich HB to the S2. You will arrive at the airport at 15:34. This is actually quite a nice route. Sit on the left side when you leave Martigny, and on the right side when you are on the IC5 after Renens.
- If that is to late for your flight, you can take the 11:17, change in Lausanne, and again in Zurich, and arrive at the airport at 15:04
I am not sure you can take the 11:05 (or the 12:05) direction Brig, as that puts you on a completely different route than the one you originally booked.