Weekday-only 300X express runs between TPA and downtown St. Pete
PSTA Route 300X runs Monday through Friday, linking Tampa International Airport’s Main terminal with downtown St. Petersburg and the Ulmerton Road corridor. This is an express bus, so it skips a lot of local stops and cuts the cross-bay trip time compared with local routes.
The 300X boards at the airport’s ground transportation area at the Main terminal; look for PSTA signage near other public buses and shuttles at Tampa International Airport. Because it’s an express route, the bus uses I-275 over the Howard Frankland Bridge instead of local streets for most of the ride.
On the St. Petersburg side, 300X serves key stops like downtown near 2nd Avenue North and 5th Street, plus park-and-ride style locations along Ulmerton Road. If you land at TPA and need to reach Pinellas County without paying rideshare prices, this is the public transit option that actually crosses the bay.
Fares on PSTA routes, including the 300X, follow the same basic structure, so a single ride costs roughly the same as any other local bus and is paid directly on board. You can pay in cash with exact change when you board at the Main terminal, or use PSTA’s mobile payment options if you have them set up before your flight.
Service only runs on weekdays, so there is no 300X on Saturdays or Sundays. If you land on a weekend, you’ll need to pivot to rideshare, taxi, rental car, or HART routes that stay on the Tampa side instead of crossing into St. Pete.
Because this is an express commuter-style bus, departures cluster around peak times and may be 30–60 minutes apart in the middle of the day. Build a buffer if your flight lands late afternoon; missing a weekday 300X run at the Main terminal can easily add an extra hour to your ground time.