The firm said it was the first global airline connections service created by a low fares carrier.
The airline will also begin selling standalone tickets on behalf of Loganair from next month, allowing easyJet customers to book onward flights from destinations such as Glasgow and Edinburgh to Scotland's Highlands and Islands.
In January, Ryanair said it hoped to start offering connections to long-haul flights from Norwegian and Aer Lingus from May, but later said that would more likely be from September. Buying tickets on the services means that passengers use the GatwickConnects product to connect their Easyjet flight with partner airline flights with launch partners Westjet and Norwegian.
British budget carrier easyJet PLC will start offering connecting services to long-haul carriers flying to the US and other destinations expanding the network of cities worldwide passengers can reach on a single ticket. The airline says it will not hold flights for connecting passengers.
British budget airline easyJet launched a new booking platform on Wednesday to allow customers to more easily connect onto long-haul flights with other airlines, moving ahead of its rivals in a potentially lucrative market.
Customers will also be able to book connecting easyJet flights as well as the GatwickConnects service in one transaction, rather than three separate ones as is needed now.
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As part of the announcement, easyJet also said passengers could connect two of its own flights. Worldwide by Easyjet is subject to a 2 hour 30 minute "Minimum Connection Time", which will give customers plenty of time to transfer between flights and/or terminals.
Carolyn McCall, Easyjet's CEO said.
The Gatwick Connect scheme allows passengers to pick up their bags and drop them off at a transfer desk before going through security for their next flight.
"By opening this new market segment this now means that easyJet can access a greater range of passengers flying across Europe".
EasyJet said more long haul airlines are expected to join the scheme soon. Nearly 200,000 Easyjet passengers a year already self-connect their Easyjet flights through Gatwick Airport. We are confident it will be popular with customers and look forward to announcing more partners in the near future.
"For us this is a great opportunity to increase passenger traffic on our long-haul routes from Gatwick".