Best Time to Drive from San Marcos to Chula Vista

Right now (7:18 pm PDT): about 39 minutes via I-15 South, usually 38 at this time.

Only 72% of this drive is measured by working traffic sensors right now. The rest is estimated from nearby sensors, typical speeds and street traffic, so times can be off. Why so few sensors work.

Typical drive time by departure time

Minutes from San Marcos to Chula Vista by day and time you leave (local time)
Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	37	39	45	55	47	41	41	41	41	42	59	52	52	39	39	38	38
Tue	37	40	49	61	54	44	42	41	41	43	57	59	59	47	38	38	38
Wed	37	40	46	57	49	42	42	41	41	43	56	57	59	45	39	38	37
Thu	37	40	48	62	52	42	41	41	41	44	60	69	63	50	39	38	37
Fri	37	40	43	47	41	41	41	41	42	48	54	56	52	42	40	38	37
Sat	38	39	39	45	39	39	39	41	42	40	40	40	39	39	38	38	39
Sun	38	38	38	38	38	38	38	39	39	39	39	39	38	38	39	38	38

About this drive

On weekdays the 42-mile drive from San Marcos to Chula Vista (via I-15 South) usually takes as little as 37 minutes and up to 69 minutes, when leaving around 4 pm on Thursdays. The fastest times to leave are before 6:30 am or after 6:30 pm. Midday (11 am to 2 pm) it takes about 41 minutes. On weekends it is slowest around 8:30 am on Saturdays (46 minutes).

About 39 miles of it is freeway, where times follow typical and live traffic from our sensors, and about 3 miles surface streets (3 to 8 minutes on weekdays), estimated from how jammed the freeways around them are at that time. Drive times are measured from central San Marcos to central Chula Vista along the route on the map. Starting or ending elsewhere in a big city can add or save several minutes.

Simulated from typical freeway speeds at each point of the drive for the time you would reach it, from every 5-minute reading we have recorded. We don't have sensors on surface streets yet, so the time on them is estimated from how congested the freeways around each end of the drive are at that time, in both directions: streets jam when the freeways do.

Questions

What is the best time to drive from San Marcos to Chula Vista?

On weekdays, leave before 6:30 am or after 6:30 pm. The drive usually takes about 37 minutes then, versus up to 69 minutes at the worst times.

How long does it take to drive from San Marcos to Chula Vista?

The 42-mile drive usually takes 37 to 69 minutes on weekdays, depending on when you leave, and about 41 minutes midday.

When is traffic worst from San Marcos to Chula Vista?

Leaving around 4 pm on Thursdays is usually slowest, about 69 minutes.

Freeways on this drive

I-15 South in San Diego (34 miles) · I-5 South in San Diego (4 miles) · SR-163 South in San Diego (1.6 miles)

San Diego traffic right now · San Diego traffic tomorrow

More drives

Chula Vista to San Marcos (return trip) · San Marcos to San Diego · San Marcos to Anaheim · San Marcos to Riverside · San Marcos to Santa Ana · San Marcos to Irvine

Open the live traffic map →

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	37	39	45	55	47	41	41	41	41	42	59	52	52	39	39	38	38
Tue	37	40	49	61	54	44	42	41	41	43	57	59	59	47	38	38	38
Wed	37	40	46	57	49	42	42	41	41	43	56	57	59	45	39	38	37
Thu	37	40	48	62	52	42	41	41	41	44	60	69	63	50	39	38	37
Fri	37	40	43	47	41	41	41	41	42	48	54	56	52	42	40	38	37
Sat	38	39	39	45	39	39	39	41	42	40	40	40	39	39	38	38	39
Sun	38	38	38	38	38	38	38	39	39	39	39	39	38	38	39	38	38

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	37	39	45	55	47	41	41	41	41	42	59	52	52	39	39	38	38
Tue	37	40	49	61	54	44	42	41	41	43	57	59	59	47	38	38	38
Wed	37	40	46	57	49	42	42	41	41	43	56	57	59	45	39	38	37
Thu	37	40	48	62	52	42	41	41	41	44	60	69	63	50	39	38	37
Fri	37	40	43	47	41	41	41	41	42	48	54	56	52	42	40	38	37
Sat	38	39	39	45	39	39	39	41	42	40	40	40	39	39	38	38	39
Sun	38	38	38	38	38	38	38	39	39	39	39	39	38	38	39	38	38

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	37	39	45	55	47	41	41	41	41	42	59	52	52	39	39	38	38
Tue	37	40	49	61	54	44	42	41	41	43	57	59	59	47	38	38	38
Wed	37	40	46	57	49	42	42	41	41	43	56	57	59	45	39	38	37
Thu	37	40	48	62	52	42	41	41	41	44	60	69	63	50	39	38	37
Fri	37	40	43	47	41	41	41	41	42	48	54	56	52	42	40	38	37
Sat	38	39	39	45	39	39	39	41	42	40	40	40	39	39	38	38	39
Sun	38	38	38	38	38	38	38	39	39	39	39	39	38	38	39	38	38