Find Cheap Flights from Northern Ireland to California

KAYAK processes over 2 billion travel queries annually and displays results from hundreds of airlines and third party sites, allowing it to find a variety of flight prices and options. It also displays results from 2M+ properties along with car hire, holiday packages, activities and millions of verified reviews so users can see as many available travel options as possible.

Hacker Fares allow you to combine one-way tickets on different airlines when it can save you money over a traditional return ticket.

Yes, KAYAK has access to more data and information than online travel agencies and consistently outperforms the competition in accuracy, globally.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a given destination and date is likely to change within 7 days, so travellers know whether to wait or book now.