Join Date: Oct 2000
Location: Munich, Germany
Programs: LH HON, DL FO/MM, Marriott Lifetime Platinum, Accor Lifetime Platinum, Sixt Diamond
Posts: 6,174
Depending on the season, I get FRA-CAI-BKK r/t as low as 1548 EUR. The added BKK-PEK r/t in F is an extra 657 EUR.
So overall, the cheapest option for your CAI/BKK/PEK combo ends up at 2205 EUR including tax, plus ticketing.