The "unrestricted" TG C-class fare from FRA is EUR4209.
Why not use LH or SK or OS - and start in LHR?
Around EUR1800+taxes / person.
Or EUR 1580 + taxes LH ATH-FRA-BKK-FRA-ATH in Business. No discount for spouse/2nd person though.
From: Frankfurt, Germany (FRA-Frankfurt Intl.)
To: Bangkok, Thailand (BKK-Bangkok Intl.)
Fare Basis Code: CRT
FRABKK-TG 8JUN03 *RULE DISPLAY* TARIFF 0004 RULE 2001
* ADD APPLICABLE TAX * FED INSP FEES *
-FARE BASIS EUR NUC PTC FT GI
CRT R 4209.00 4626.34 ADT NL EH
CRT/CH25 R 3157.00 3469.75 CNN NL EH
CRT/IN90 R 421.00 462.63 INF NL EH
CRT/IN25 R 3157.00 3469.75 INS NL EH
CRT R 4209.00 4626.34 UNN NL EH
BOOKING CODES C