An online advertisement for Ryanair, Europe's largest low-cost airline, states they are flying 1,000 daily flights from July 1 with new health measures, seen on a screen in London, Britain May 17, 2020. REUTERS/Russell Boyce

An online advertisement for Ryanair, Europe's largest low-cost airline, states they are flying 1,000 daily flights from July 1 with new health measures, seen on a screen in London, Britain May 17, 2020. REUTERS/Russell Boyce

Ryanair planes are seen at Dublin Airport, following the outbreak of the coronavirus disease (COVID-19), Dublin, Ireland, May 1, 2020. REUTERS/Jason Cairnduff

Ryanair planes are seen at Dublin Airport, following the outbreak of the coronavirus disease (COVID-19), Dublin, Ireland, May 1, 2020. REUTERS/Jason Cairnduff

Ryanair planes are seen at Dublin Airport, following the outbreak of the coronavirus disease (COVID-19), Dublin, Ireland, May 1, 2020. REUTERS/Jason Cairnduff

A Ryanair Boeing 737 is seen at Luton Airport, following the outbreak of the coronavirus disease (COVID-19), Luton, Britain, April 26, 2020. REUTERS/Andrew Boyers

A Ryanair Boeing 737 and and an Easyjet Airbus A320 are seen at Luton Airport, following the outbreak of the coronavirus disease (COVID-19), Luton, Britain, April 26, 2020. REUTERS/Andrew Boyers

A Ryanair Boeing 737 is seen at Luton Airport, following the outbreak of the coronavirus disease (COVID-19), Luton, Britain, April 26, 2020. REUTERS/Andrew Boyers

Ryanair aircrafts are parked on the tarmac before the closure of Brussels South Charleroi Airport as airlines have suspended flights to slow down the spread of coronavirus disease (COVID-19), Charleroi, Belgium March 24, 2020. REUTERS/Francois Lenoir

Ryanair aircrafts are parked on the tarmac before the closure of Brussels South Charleroi Airport as airlines have suspended flights to slow down the spread of coronavirus disease (COVID-19), Charleroi, Belgium March 24, 2020. Picture taken through glass. REUTERS/Francois Lenoir

Easyjet and Ryanair aeroplanes are at Luton Airport as the number of coronavirus cases grow around the world. Luton, Britain, March 17, 2020. REUTERS/Peter Cziborra

Ryanair planes are seen at Luton Airport as the number of coronavirus cases grow around the world London, Britain, March 17, 2020. REUTERS/Peter Cziborra

Ryanair plane is seen at Luton Airport as the number of coronavirus cases grow around the world London, Britain, March 17, 2020. REUTERS/Peter Cziborra

Ryanair Boeing 737-8AS plane takes off before all international flights will be cancelled on Monday midnight, March 16, as a preventive measure against the coronavirus disease (COVID-19) in Riga, Latvia March 16, 2020. REUTERS/Ints Kalnins

Ryanair airplanes are seen parked on the tarmac of the Rome-Ciampino International Airpot, as the Italian government continues restrictive movement measures to combat the coronavirus outbreak, in Rome, Italy March 14, 2020. REUTERS/Alberto Lingria

Ryanair airplanes are seen parked on the tarmac of the Rome-Ciampino International Airpot, as the Italian government continues restrictive movement measures to combat the coronavirus outbreak, in Rome, Italy March 14, 2020. REUTERS/Alberto Lingria

Ryanair airplanes are seen parked on the tarmac of the Rome-Ciampino International Airpot, as the Italian government continues restrictive movement measures to combat the coronavirus outbreak, in Rome, Italy March 14, 2020. REUTERS/Alberto Lingria

Ryanair Chief Executive Michael O'Leary attends the Europe Aviation Summit in Brussels, Belgium March 3, 2020. REUTERS/Johanna Geron

Airlines for Europe A4E Managing Director Thomas Reynaert, CEO of Air France-KLM Benjamin Smith, Chief Executive of International Airlines Group (IAG) Willie Walsh, Chairman of the Executive Board and Chief Executive Officer of Deutsche Lufthansa AG Carsten Spohr, CEO of easyJet Johan Lundgren and Ryanair Chief Executive Michael O'Leary pose as they attend the Europe Aviation Summit in Brussels, Belgium March 3, 2020. REUTERS/Johanna Geron

Airlines for Europe A4E Managing Director Thomas Reynaert, CEO of Air France-KLM Benjamin Smith, Chief Executive of International Airlines Group (IAG) Willie Walsh, Chairman of the Executive Board and Chief Executive Officer of Deutsche Lufthansa AG Carsten Spohr, CEO of easyJet Johan Lundgren and Ryanair Chief Executive Michael O'Leary attend the Europe Aviation Summit in Brussels, Belgium March 3, 2020. REUTERS/Johanna Geron

Ryanair Chief Executive Michael O'Leary attends the Europe Aviation Summit in Brussels, Belgium March 3, 2020. REUTERS/Johanna Geron

Ryanair Chief Executive Michael O'Leary attends the Europe Aviation Summit in Brussels, Belgium March 3, 2020. REUTERS/Johanna Geron

Ryanair Boeing 737-8AS plane EI-EKG lands in Riga International Airport in Riga, Latvia January 17, 2020. REUTERS/Ints Kalnins

Ryanair Boeing 737-8AS plane EI-EKG approaches Riga International Airport in Riga, Latvia January 17, 2020. REUTERS/Ints Kalnins

Peter Bellew, former Chief Operating Officer of Ryanair, leaves the Four Courts in Dublin after the opening day of Ryanair's High Court Action to prevent him from joining its competitor Easyjet as COO in January, Dublin, Ireland December 3, 2019. REUTERS/Lorraine O'Sullivan

Peter Bellew, former Chief Operating Officer of Ryanair, leaves the Four Courts in Dublin after the opening day of Ryanair's High Court Action to prevent him from joining its competitor Easyjet as COO in January, Dublin, Ireland December 3, 2019. REUTERS/Lorraine O'Sullivan

Peter Bellew, former Chief Operating Officer of Ryanair, leaves the Four Courts in Dublin after the opening day of Ryanair's High Court Action to prevent him from joining its competitor Easyjet as COO in January, Dublin, Ireland December 3, 2019. REUTERS/Lorraine O'Sullivan

Ryanair's Michael O'Leary walks at the Four Courts in Dublin after the opening day of Ryanair's High Court Action to prevent former Chief Operating Officer Peter Bellew from joining its competitor Easyjet as Chief Operating Officer in January, Dublin, Ireland December 3, 2019. REUTERS/Lorraine O'Sullivan

Ryanair's Michael O'Leary walks at the Four Courts in Dublin after the opening day of Ryanair's High Court Action to prevent former Chief Operating Officer Peter Bellew from joining its competitor Easyjet as Chief Operating Officer in January, Dublin, Ireland December 3, 2019. REUTERS/Lorraine O'Sullivan

Ryanair's Michael O'Leary walks at the Four Courts in Dublin after the opening day of Ryanair's High Court Action to prevent former Chief Operating Officer Peter Bellew from joining its competitor Easyjet as Chief Operating Officer in January, Dublin, Ireland December 3, 2019. REUTERS/Lorraine O'Sullivan

Ryanair Chief Executive Michael O'Leary speaks during a Reuters Newsmaker event in London, Britain October 1, 2019. REUTERS/Peter Nicholls

Ryanair Chief Executive Michael O'Leary takes part in a Q&A session during a Reuters Newsmaker event in London, Britain October 1, 2019. REUTERS/Peter Nicholls

Ryanair Chief Executive Michael O'Leary takes part in a Q&A session during a Reuters Newsmaker event in London, Britain October 1, 2019. REUTERS/Peter Nicholls

Ryanair Chief Executive Michael O'Leary takes part in a Q&A session during a Reuters Newsmaker event in London, Britain October 1, 2019. REUTERS/Peter Nicholls

Ryanair Chief Executive Michael O'Leary is interviewed by Reuters journalist Tim Hepher during a Reuters Newsmaker event in London, Britain October 1, 2019. REUTERS/Peter Nicholls

Ryanair Chief Executive Michael O'Leary speaks during a Reuters Newsmaker event in London, Britain October 1, 2019. REUTERS/Peter Nicholls

Ryanair Chief Executive Michael O'Leary is interviewed by Reuters journalist Tim Hepher during a Reuters Newsmaker event in London, Britain October 1, 2019. REUTERS/Peter Nicholls

Ryanair Chief Executive Michael O'Leary is interviewed by Reuters journalist Tim Hepher during a Reuters Newsmaker event in London, Britain October 1, 2019. REUTERS/Peter Nicholls

Ryanair Chief Executive Michael O'Leary is interviewed by Reuters journalist Tim Hepher during a Reuters Newsmaker event in London, Britain October 1, 2019. REUTERS/Peter Nicholls

Ryanair Chief Executive Michael O'Leary speaks during a Reuters Newsmaker event in London, Britain October 1, 2019. REUTERS/Peter Nicholls

Ryanair Chief Executive Michael O'Leary is interviewed by Reuters journalist Tim Hepher during a Reuters Newsmaker event in London, Britain October 1, 2019. REUTERS/Peter Nicholls

Ryanair Chief Executive Michael O'Leary speaks during a Reuters Newsmaker event in London, Britain October 1, 2019. REUTERS/Peter Nicholls

Ryanair Chief Executive Michael O'Leary arrives to attend a Reuters Newsmaker event in London, Britain October 1, 2019. REUTERS/Peter Nicholls

Ryanair Chief Executive Michael O'Leary arrives to attend a Reuters Newsmaker event in London, Britain October 1, 2019. REUTERS/Peter Nicholls

Ryanair Chief Executive Michael O'Leary arrives to attend a Reuters Newsmaker event in London, Britain October 1, 2019. REUTERS/Peter Nicholls

Ryanair Chief Executive Michael O'Leary arrives to attend a Reuters Newsmaker event in London, Britain October 1, 2019. REUTERS/Peter Nicholls

A Ryanair aircraft takes off at the aircraft builder's headquarters of Airbus in Colomiers near Toulouse, France, September 27, 2019. REUTERS/Regis Duvignau

Ryanair Chief Executive Michael O'Leary and Laudamotion CEO Andreas Gruber address a news conference in Vienna, Austria September 26, 2019. REUTERS/Leonhard Foeger

Ryanair Chief Executive Michael O'Leary and Laudamotion CEO Andreas Gruber address a news conference in Vienna, Austria September 26, 2019. REUTERS/Leonhard Foeger

Laudamotion CEO Andreas Gruber addresses a news conference in Vienna, Austria September 26, 2019. REUTERS/Leonhard Foeger

Ryanair Chief Executive Michael O'Leary and Laudamotion CEO Andreas Gruber address a news conference in Vienna, Austria September 26, 2019. REUTERS/Leonhard Foeger

Ryanair Chief Executive Michael O'Leary and Laudamotion CEO Andreas Gruber address a news conference in Vienna, Austria September 26, 2019. REUTERS/Leonhard Foeger

The Laudamotion logo is seen during a news conference in Vienna, Austria September 26, 2019. REUTERS/Leonhard Foeger

Ryanair Chief Executive Michael O'Leary addresses a news conference in Vienna, Austria September 26, 2019. REUTERS/Leonhard Foeger

Ryanair Chief Executive Michael O'Leary addresses a news conference in Vienna, Austria September 26, 2019. REUTERS/Leonhard Foeger

Ryanair Chief Executive Michael O'Leary addresses a news conference in Vienna, Austria September 26, 2019. REUTERS/Leonhard Foeger

Ryanair Chief Executive Michael O'Leary addresses a news conference in Vienna, Austria September 26, 2019. REUTERS/Leonhard Foeger

Ryanair Chief Executive Michael O'Leary addresses a news conference in Vienna, Austria September 26, 2019. REUTERS/Leonhard Foeger

Passengers board a Ryanair flight at the airport in Gdansk, Poland, June 19, 2019. REUTERS/Kevin Coombs

Passengers watch a Ryanair flight on the runway at the airport in Gdansk, Poland, June 19, 2019. REUTERS/Kevin Coombs