The average bus between Black Diamond and SeaTac takes 1h 14m and the fastest bus takes 1h 4m. The bus service runs several times per day from Black Diamond to SeaTac. 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 every 4 hours between Black Diamond and SeaTac. The earliest departure is at 7:50 AM in the morning, and the last departure from Black Diamond is at 4:50 PM which arrives into SeaTac at 6:15 PM. All services require a transfer at Renton Transit Center - Bay 6 and take an average of 1h 14m. The schedules shown below are for the next available departures.

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1h 4m • 1 change

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1h 4m • 1 change

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Want to know about travelling from Black Diamond to SeaTac? 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 Black Diamond to SeaTac. However, there are services departing from Black Diamond station and arriving at SeaTac station via Renton Transit Center - Bay 6. The journey, including transfers, takes approximately 1h 14m.
Black Diamond to SeaTac bus services, operated by King County Metro, depart from Baker St & 3rd Ave station.
Black Diamond to SeaTac bus services, operated by King County Metro, arrive at SeaTac Station.
The distance between Black Diamond and SeaTac is 26.7 km. The road distance is 44 km.
You can take a bus from Baker St & 3rd Ave to SeaTac Station via Renton Transit Center - Bay 6 and Renton TC - Bay 4 in around 1h 24m.