The joint business between American Airlines and Japan Airlines, slated to begin April 1, is expected to benefit consumers with an expanded number of codeshare flights, easier redemption of miles in their loyalty programs, and the availability of enhanced online tools.

The two airlines, after receiving regulatory nods in their respective countries, are phasing in their new business cooperation, resulting in “better flight schedules, expanded codesharing, more coordinated services and greater access to a wider variety of fares,” the airlines say.

The airlines intend to codeshare on 123 routes and plan on expanding that number as their business cooperation evolves. By early April the two airlines will have coordinated their summer schedules, with the goal of reducing connection and overall travel times.

The increased number of codeshares, the airlines say, will make it easier for travelers who belong to both carriers’ mileage programs to redeem miles on each airlines’ flights. The two carriers also indicated they have a summer timetable for making online improvements.

They intend to share content on one another’s websites and provide online booking capability and check-in, regardless of which airline the passenger is flying. American Airlines and Japan Airlines also vow to provide travel agencies and corporations with more coordinated pricing and programs.