Star Alliance - Star Alliance RT in Business Class from MAA to LAX

I am trying to get RT business class tickets for my parents from MAA (Chennai, India) to LAX (Los Angeles, USA). They are flexible in their itinerary and dates. They would like to fly from MAA anywhere between Nov 1 and Nov 13 and return anywhere between Dec 7 and Dec 15. Could someone provide me best rates and route details? Any airline or airline combo among the following is fine (no order of priority):

Singapore Airlines
THAI
SWISS
Lufthansa
United

The flights will be ticketed in India.

Thanks!

Why don't you ring your local TA in MAA or LAX? If your question is about reward redemption, then it may be valid... Unless you want your parents to do a MR? Unlikely...

And you have effectively posted the same thread three times!!! That's against FT rule...

Why don't you ring your local TA in MAA or LAX? If your question is about reward redemption, then it may be valid... Unless you want your parents to do a MR? Unlikely...

And you have effectively posted the same thread three times!!! That's against FT rule...

I flagged the Mods on cross-posting. OP posed same question in *A, oneworld and SkyTeam.

Sorry about the cross-posting. I just wasn't sure where to post if I were to ask about a "good fare" across all airline alliances.