Singapore Airlines and Garuda Indonesia have expanded their codesharing partnership to now include both carriers’ flights between Singapore and Jakarta.

Until now the two airlines, which are members of different airline alliances, only codeshared on flights between Singapore and Denpasar (Bali) and between Singapore and Surabaya. Singapore Airlines is a member of Star Alliance and Garuda Indonesia is a member of Skyteam.

The move will give customers of both airlines substantially more flight options on what is one of the busiest international air routes in the world. Singapore Airlines and Garuda each operate nine flights a day between the two cities.

Speaking about the agreement, Garuda Indonesia director of commercial, Pikri Ilham Kurniansyah, said: “The codeshare agreement allows the passengers to benefit from the networks of both airlines to travel between Singapore and Indonesia with seamless connectivity and increased travel flexibility.”

The agreement will mean that travellers can now book flights operated by both carriers between Singapore and Jakarta through either airline. Passengers travelling on these flights as part of a longer, multi-stage itinerary will also be able to check-in their luggage through to their final destination without having to pick it up during transit or collect a new boarding pass.

Codeshare partnerships also tend to include the ability to earn and redeem miles on codeshared routes, as well as reciprocal lounge access, though a spokesperson for Singapore Airlines confirmed to Business Traveller Asia-Pacific that the two airlines do not have a frequent-flyer partnership.

Together, Singapore Airlines and Garuda Indonesia operate a combined 175 weekly flights between Singapore and Indonesia.