Best Time to Drive from Lake Forest to Ontario

Right now (7:36 pm PST): about 44 minutes via SR-241 North and SR-91 East, usually 44 at this time.

Only 23% 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 Lake Forest to Ontario 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	40	43	55	51	47	45	45	45	46	50	59	62	60	48	45	43	41
Tue	40	44	56	54	50	47	47	46	47	53	60	62	61	49	46	44	41
Wed	40	43	55	55	50	46	45	46	46	54	60	61	61	50	45	44	41
Thu	41	43	53	53	47	45	46	46	48	54	62	62	62	52	46	44	41
Fri	40	42	44	45	45	45	46	47	57	62	64	64	61	51	46	44	41
Sat	40	41	42	42	43	44	47	45	44	47	51	49	50	47	45	43	41
Sun	40	40	40	40	41	42	42	43	43	42	43	42	41	42	41	42	41

About this drive

On weekdays the 36-mile drive from Lake Forest to Ontario (via SR-241 North and SR-91 East) usually takes as little as 40 minutes and up to 64 minutes, when leaving around 3:30 pm on Fridays. The fastest times to leave are before 6:30 am or after 8 pm. Midday (11 am to 2 pm) it takes about 48 minutes. On weekends it is slowest around 3:30 pm on Saturdays (51 minutes).

About 21 miles of it is freeway, where times follow typical and live traffic from our sensors, and about 15 miles surface streets (22 to 38 minutes on weekdays), estimated from how jammed the freeways around them are at that time. Drive times are measured from central Lake Forest to central Ontario 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 Lake Forest to Ontario?

On weekdays, leave before 6:30 am or after 8 pm. The drive usually takes about 40 minutes then, versus up to 64 minutes at the worst times.

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

The 36-mile drive usually takes 40 to 64 minutes on weekdays, depending on when you leave, and about 48 minutes midday.

When is traffic worst from Lake Forest to Ontario?

Leaving around 3:30 pm on Fridays is usually slowest, about 64 minutes.

Freeways on this drive

SR-241 North in Orange County (12 miles) · SR-91 East in Orange County (7 miles) · SR-133 North in Orange County (1.6 miles)

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

More drives

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

Open the live traffic map →

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	40	43	55	51	47	45	45	45	46	50	59	62	60	48	45	43	41
Tue	40	44	56	54	50	47	47	46	47	53	60	62	61	49	46	44	41
Wed	40	43	55	55	50	46	45	46	46	54	60	61	61	50	45	44	41
Thu	41	43	53	53	47	45	46	46	48	54	62	62	62	52	46	44	41
Fri	40	42	44	45	45	45	46	47	57	62	64	64	61	51	46	44	41
Sat	40	41	42	42	43	44	47	45	44	47	51	49	50	47	45	43	41
Sun	40	40	40	40	41	42	42	43	43	42	43	42	41	42	41	42	41

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	40	43	55	51	47	45	45	45	46	50	59	62	60	48	45	43	41
Tue	40	44	56	54	50	47	47	46	47	53	60	62	61	49	46	44	41
Wed	40	43	55	55	50	46	45	46	46	54	60	61	61	50	45	44	41
Thu	41	43	53	53	47	45	46	46	48	54	62	62	62	52	46	44	41
Fri	40	42	44	45	45	45	46	47	57	62	64	64	61	51	46	44	41
Sat	40	41	42	42	43	44	47	45	44	47	51	49	50	47	45	43	41
Sun	40	40	40	40	41	42	42	43	43	42	43	42	41	42	41	42	41

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	40	43	55	51	47	45	45	45	46	50	59	62	60	48	45	43	41
Tue	40	44	56	54	50	47	47	46	47	53	60	62	61	49	46	44	41
Wed	40	43	55	55	50	46	45	46	46	54	60	61	61	50	45	44	41
Thu	41	43	53	53	47	45	46	46	48	54	62	62	62	52	46	44	41
Fri	40	42	44	45	45	45	46	47	57	62	64	64	61	51	46	44	41
Sat	40	41	42	42	43	44	47	45	44	47	51	49	50	47	45	43	41
Sun	40	40	40	40	41	42	42	43	43	42	43	42	41	42	41	42	41