The average bus between SeaTac and Interbay takes 1h 3m and the fastest bus takes 54 min. The bus service runs several times per day from SeaTac to Interbay. 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 SeaTac and Interbay. The earliest departure is at 12:00 AM at night, and the last departure from SeaTac is at 11:30 PM which arrives into Interbay at 12:24 AM. All services require a transfer at 4th Ave S & S Jackson St and take an average of 1h 3m. The schedules shown below are for the next available departures.

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1h 8m • 1 change

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1h 3m • 1 change

54 min • 1 change

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1h 6m • 1 change

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1h 5m • 1 change
Want to know about travelling from SeaTac to Interbay? 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 SeaTac to Interbay. However, there are services departing from SeaTac station and arriving at Interbay station via 4th Ave S & S Jackson St. The journey, including transfers, takes approximately 1h 3m.
SeaTac to Interbay bus services, operated by Sound Transit, depart from International Blvd & S 176th St - Bay 2 station.
SeaTac to Interbay bus services, operated by Sound Transit, arrive at 15th Ave W & W Wheeler St station.
The distance between SeaTac and Interbay is 22.4 km. The road distance is 27 km.
You can take a bus from International Blvd & S 176th St - Bay 2 to 15th Ave W & W Wheeler St via 4th Ave S & S Jackson St and Prefontaine Pl S & Yesler Way in around 57 min.