Ulster's air fares war is heating up with travellers being offered one way fares from Belfast for as little as £5 - including taxes and charges.
The news comes after Ryanair weighed into the flight price battle yesterday by slashing 50% off its lowest fares to various domestic destinations, and also vowed to pay double the difference to any passengers who find a lower fare on the same route with an alternative carrier.
Caroline Baldwin, Ryanair's sales and marketing manager, said: "We urge all passengers to book these £5 fares straight away as they will be snapped up in record time."
The move comes a day after Aer Lingus boss Dermot Mannion said it was "all systems go" for the launch of the airline's new hub at Belfast International Airport in early December.
Aer Lingus earlier announced eight flights to be put into operation over the following weeks. A ninth was added yesterday.
People travelling from Northern Ireland are already able to access flights to more than 50 destinations.
Ryanair will fly a service four times daily to Stansted, twice daily to Liverpool and daily services to both East Midlands and Prestwick airports.
The booking period for fares from £5 one way, including taxes and charges started yesterday at midnight and runs until midnight on Thursday October 25. Travel period is from November 6, 2007 until March 12, 2008.