Best Time to Drive from Fontana to Lake Forest

Right now (6:18 pm PDT): about 52 minutes via SR-241 South and I-15 South and SR-91 West, usually 50 at this time.

Only 25% 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 Fontana to Lake Forest 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	49	66	73	76	64	56	56	56	56	57	57	59	56	54	50	50	49
Tue	48	69	77	79	70	57	54	52	53	53	57	55	52	53	50	50	47
Wed	50	66	72	79	68	58	55	53	54	53	54	54	53	52	49	51	48
Thu	50	67	72	72	61	58	54	54	56	57	56	55	55	54	49	49	48
Fri	48	59	63	65	60	55	57	56	56	56	56	57	57	57	53	49	47
Sat	48	50	50	50	51	52	55	58	57	57	56	56	52	54	52	48	47
Sun	47	48	48	49	50	52	55	55	55	55	54	53	50	51	51	52	47

About this drive

On weekdays the 51-mile drive from Fontana to Lake Forest (via SR-241 South and I-15 South and SR-91 West) usually takes as little as 47 minutes and up to 79 minutes, when leaving around 8 am on Wednesdays. The fastest times to leave are before 5:30 am or after 6:30 pm. Midday (11 am to 2 pm) it takes about 55 minutes. On weekends it is slowest around 1:30 pm on Saturdays (58 minutes).

About 46 miles of it is freeway, where times follow typical and live traffic from our sensors, and about 5 miles surface streets (6 to 11 minutes on weekdays), estimated from how jammed the freeways around them are at that time. Drive times are measured from central Fontana to central Lake Forest 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 Fontana to Lake Forest?

On weekdays, leave before 5:30 am or after 6:30 pm. The drive usually takes about 47 minutes then, versus up to 79 minutes at the worst times.

How long does it take to drive from Fontana to Lake Forest?

The 51-mile drive usually takes 47 to 79 minutes on weekdays, depending on when you leave, and about 55 minutes midday.

When is traffic worst from Fontana to Lake Forest?

Leaving around 8 am on Wednesdays is usually slowest, about 79 minutes.

Freeways on this drive

SR-241 South in Orange County (16 miles) · SR-91 West in Orange County (10 miles) · I-10 West in Inland Empire (7 miles) · I-15 South in Inland Empire (7 miles) · I-15 South in Orange County (6 miles)

Inland Empire traffic right now · Inland Empire traffic tomorrow · Orange County traffic right now · Orange County traffic tomorrow

More drives

Lake Forest to Fontana (return trip) · Fontana to Los Angeles · Fontana to Long Beach · Fontana to Anaheim · Fontana to Santa Ana · Fontana to Irvine · Fontana to San Bernardino · Fontana to Moreno Valley · Fontana to Huntington Beach · Fontana to Glendale · Fontana to Santa Clarita · Fontana to Oceanside

Open the live traffic map →

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	49	66	73	76	64	56	56	56	56	57	57	59	56	54	50	50	49
Tue	48	69	77	79	70	57	54	52	53	53	57	55	52	53	50	50	47
Wed	50	66	72	79	68	58	55	53	54	53	54	54	53	52	49	51	48
Thu	50	67	72	72	61	58	54	54	56	57	56	55	55	54	49	49	48
Fri	48	59	63	65	60	55	57	56	56	56	56	57	57	57	53	49	47
Sat	48	50	50	50	51	52	55	58	57	57	56	56	52	54	52	48	47
Sun	47	48	48	49	50	52	55	55	55	55	54	53	50	51	51	52	47

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	49	66	73	76	64	56	56	56	56	57	57	59	56	54	50	50	49
Tue	48	69	77	79	70	57	54	52	53	53	57	55	52	53	50	50	47
Wed	50	66	72	79	68	58	55	53	54	53	54	54	53	52	49	51	48
Thu	50	67	72	72	61	58	54	54	56	57	56	55	55	54	49	49	48
Fri	48	59	63	65	60	55	57	56	56	56	56	57	57	57	53	49	47
Sat	48	50	50	50	51	52	55	58	57	57	56	56	52	54	52	48	47
Sun	47	48	48	49	50	52	55	55	55	55	54	53	50	51	51	52	47

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	49	66	73	76	64	56	56	56	56	57	57	59	56	54	50	50	49
Tue	48	69	77	79	70	57	54	52	53	53	57	55	52	53	50	50	47
Wed	50	66	72	79	68	58	55	53	54	53	54	54	53	52	49	51	48
Thu	50	67	72	72	61	58	54	54	56	57	56	55	55	54	49	49	48
Fri	48	59	63	65	60	55	57	56	56	56	56	57	57	57	53	49	47
Sat	48	50	50	50	51	52	55	58	57	57	56	56	52	54	52	48	47
Sun	47	48	48	49	50	52	55	55	55	55	54	53	50	51	51	52	47