The average bus between Federal Way and Mercer Island takes 1h 22m and the fastest bus takes 1h 12m. There is a bus service every few hours from Federal Way to Mercer Island. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Buses run hourly between Federal Way and Mercer Island. The earliest departure is at 5:15 AM in the morning, and the last departure from Federal Way is at 5:49 PM which arrives into Mercer Island at 7:09 PM. All services require a transfer at 4th Ave & University and take an average of 1h 22m. The schedules shown below are for the next available departures.


1h 14m • 2 changes


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1h 31m • 2 changes


1h 18m • 2 changes


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1h 31m • 2 changes


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1h 18m • 2 changes
Want to know about travelling from Federal Way to Mercer Island? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct bus from Federal Way to Mercer Island. However, there are services departing from Federal Way station and arriving at Mercer Island station via 4th Ave & University. The journey, including transfers, takes approximately 1h 22m.
Federal Way to Mercer Island bus services, operated by Sound Transit, depart from Federal Way Downtown Station - Bay 3.
Federal Way to Mercer Island bus services, operated by Sound Transit, arrive at N Mercer Way & 80th Ave SE - Bay 2 station.
The distance between Federal Way and Mercer Island is 28.4 km. The road distance is 49 km.
You can take a bus from Federal Way Downtown Station - Bay 3 to 86th Ave SE & SE 42nd St via 4th Ave & University, Union St & 4th Ave, and N Mercer Way & 80th Ave SE - Bay 2 in around 1h 44m.