SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                                    FORM 6-K


                        Report of Foreign Private Issuer


                       Pursuant to Rule 13a-16 or 15d-16
                     of the Securities Exchange Act of 1934


                         For the month of November 2007

                              RYANAIR HOLDINGS PLC
                (Translation of registrant's name into English)

                     c/o Ryanair Ltd Corporate Head Office
                                 Dublin Airport
                             County Dublin Ireland
                    (Address of principal executive offices)


Indicate by check mark whether the registrant files or will file annual
reports under cover Form 20-F or Form 40-F.

                         Form 20-F..X.. Form 40-F.....


Indicate by check mark whether the registrant by furnishing the information
contained in this Form is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange
Act of 1934.

                               Yes ..... No ..X..


If "Yes" is marked, indicate below the file number assigned to the registrant
in connection with Rule 12g3-2(b): 82- ________



                        RYANAIR SUES EUROPEAN COMMISSION
                FOR ITS FAILURE TO INVESTIGATE ILLEGAL STATE AID
                              TO OLYMPIC AIRLINES

Ryanair,  Europe's favourite low fares airline,  today (Thursday,  22nd November
2007) lodged a case in the European Court of First Instance against the European
Commission's failure to act on Ryanair's complaint about a further approximately
EUR500 million worth of illegal State aid to Olympic  Airlines,  granted through
bogus "arbitration"  proceedings involving certain "services" allegedly provided
by Olympic to the Greek  Government.  The Greek  Government  was found guilty of
providing hundreds of millions to Olympic to bail it out in the past and this is
the latest attempt to prop up this failed national  carrier.  Ryanair has called
on the  Commission to  investigate  this obvious abuse of EU  competition  rules
already in 2006, but the Commission has so far failed to do so.

Announcing the launch of these proceedings Michael O'Leary, Ryanair's CEO, said:

     "This is just another example of the Commission's  twin track approach
     to State aid in the air  transport  sector.  On one hand they  continue  to
     waste time and taxpayers money  investigating  baseless  complaints against
     standard free market deals at regional and secondary airports,  for example
     Tampere and Alghero.  These  complaints were filed by inefficient high fare
     flag carrier airlines operating at expensive hub airports,  who would never
     fly to smaller  airports and are simply trying to prevent  competition  and
     consumer choice.

     "On the other hand, the Commission  repeatedly  ignores  blatant State
     aid to Air France,  Lufthansa,  Olympic,  Alitalia  and  others.  The Greek
     Government's   most  recent  tranche  of  State  aid  to  Olympic  involves
     approximately  EUR500  million,  mostly  for  "unpaid  services"  allegedly
     provided by Olympic to the Government.  However, the Commission has refused
     to do anything about this since 2006, which left us with no alternative but
     to challenge the Commission's inaction in the European courts.

     "It appears that the  Commission  applies two  approaches to enforcing
     the State aid rules: one of ignoring or signing off on continuing  unlawful
     State aid for the  inefficient  high fare flag  carrier  airlines,  and the
     other of pursuing  baseless  complaints by flag carriers  against low fares
     airlines operating out of regional and secondary airports.  This twin track
     approach must end and we are therefore  calling on the  Commission to start
     promoting  competition,  end unlawful State aid, and stop  protecting  flag
     carrier airlines".

Ends.                                    Thursday, 22nd November 2007

For reference: Peter Sherrard - Ryanair  Pauline McAlester - Murray Consultants

Tel: +353-1-8121228                      Tel: +353-1-4980300


                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned, hereunto duly authorized.

                                    RYANAIR HOLDINGS PLC


Date:  22 November, 2007

                                    By:___/s/ James Callaghan____

                                    James Callaghan
                                    Company Secretary & Finance Director