Bus 621 - American High - Thornton Middle Schedule in Union City

A bus service operated by AC Transit

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List of stops

Number of stops: 15

Map

Thornton Av & Dusterberry Way (Thornton Jr High) – Ardenwood Blvd & Commerce Dr

Timing points All stops

Thornton Av & Dusterberry Way (Thornton Jr High)	14:34	14:35	—	—
Fremont Blvd & Thornton Av	14:35	14:36	—	—
Fremont Blvd & Alder Av (American Sr High School)	14:37	14:38	15:40	15:41
Fremont Blvd & Nicolet Av	14:39	14:40	15:42	15:43
Fremont Blvd & Tamayo St	14:39	14:40	15:42	15:43
Decoto Rd & Fremont Blvd	14:42	14:43	15:45	15:46
Decoto Rd & Brookmill Dr	14:42	14:43	15:45	15:46
Paseo Padre Pkwy & Warwick Rd	14:44	14:45	15:47	15:48
Paseo Padre Pkwy & Darwin Dr	14:44	14:45	15:47	15:48
Paseo Padre Pkwy & Whitehead Ln	14:45	14:46	15:48	15:49
Paseo Padre Pkwy & Langhorn Dr	14:46	14:47	15:49	15:50
Paseo Padre Pkwy & Milton St	14:47	14:48	15:50	15:51
Paseo Padre Pkwy & Fremont Blvd	14:48	14:49	15:51	15:52
Paseo Padre Pkwy & Blackstone Way	14:48	14:49	15:51	15:52
Paseo Padre Pkwy & Siward Dr	14:50	14:51	15:53	15:54
Paseo Padre Pkwy & Deep Creek Rd	14:51	14:52	15:54	15:55
Paseo Padre Pkwy & Half Hitch St	14:53	14:54	15:56	15:57
Ardenwood Blvd & Tan Oak Dr	14:54	14:55	15:57	15:58
Ardenwood Blvd & Commerce Dr	14:56	14:57	15:59	16:00

Times marked with "—" indicate that the vehicle does not stop at this stop.

Ardenwood Blvd & Commerce Dr – Thornton Av & Dusterberry Way (Thornton Jr High)

Timing points All stops

Ardenwood Blvd & Commerce Dr	07:17	07:42
Ardenwood Blvd & Tan Oak Dr	07:17	07:42
Paseo Padre Pkwy & Tupelo St	07:18	07:43
Paseo Padre Pkwy & Deep Creek Rd	07:20	07:45
Paseo Padre Pkwy & Siward Dr	07:21	07:46
Paseo Padre Pkwy & Blackstone Way	07:22	07:47
Paseo Padre Pkwy & Fremont Blvd	07:23	07:48
Paseo Padre Pkwy & Bowling Green Common	07:23	07:48
Paseo Padre Pkwy & Chaucer Dr	07:27	07:52
Paseo Padre Pkwy & Darwin Dr	07:28	07:53
Paseo Padre Pkwy & Warwick Rd	07:29	07:54
Decoto Rd & Paseo Padre Pkwy	07:30	07:55
Fremont Blvd & Decoto Rd	07:35	08:00
Fremont Blvd & Tamayo St	07:37	08:03
Fremont Blvd & Nicolet Av	07:39	08:06
Fremont Blvd & Gibraltar Dr	07:40	08:08
Fremont Blvd & Alder Av (American Sr High School)	07:42	08:12
Thornton Av & Dusterberry Way (Thornton Jr High)	07:45	—

Times marked with "—" indicate that the vehicle does not stop at this stop.

Last updated on March 23, 2026

Route Path (Streets & Roads)

Outbound: Thornton Av & Dusterberry Way (Thornton Jr High) – Ardenwood Blvd & Commerce Dr

Thornton Avenue - Fremont Boulevard - Decoto Road - Paseo Padre Parkway - Ardenwood Boulevard

Inbound: Ardenwood Blvd & Commerce Dr – Thornton Av & Dusterberry Way (Thornton Jr High)

Ardenwood Boulevard - Paseo Padre Parkway - Decoto Road - Fremont Boulevard - Thornton Avenue

All data is available in GTFS feed: sfmta

Bus 621 FAQ

What time does the 621 bus start operating?

Services on the 621 - American High - Thornton Middle bus start at 14:34 on Monday, Tuesday, Wednesday, Thursday, Friday.
What time does the 621 bus stop working?

Services on the 621 - American High - Thornton Middle bus stop at 16:00 on Monday, Tuesday, Wednesday, Thursday, Friday.
Is there a 621 bus stop near me?

Click here to view the nearest 621 - American High - Thornton Middle bus stop.

621 bus Route Map

PDF Version: 621 timetable, stops and map

621 (Union City Buses)

The first stop of the 621 bus route is Thornton Av & Dusterberry Way (Thornton Jr High) and the last stop is Ardenwood Blvd & Commerce Dr. 621 (American High - Thornton Middle) is operational during on weekdays.

Additional information: 621 has 19 stops and the total trip duration for this route is approximately 22 minutes.

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