Best Time to Drive from Lake Forest to Fontana

Right now (6:18 pm PDT): about 55 minutes via I-15 North and SR-241 North and SR-91 East, usually 52 at this time.

Only 19% 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 Fontana 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	48	52	58	55	54	54	54	55	56	59	63	65	59	54	53	51	48
Tue	48	53	58	56	54	53	53	54	55	59	63	63	59	54	52	51	48
Wed	48	53	57	57	53	54	54	54	54	57	60	60	60	53	54	51	48
Thu	48	52	57	55	53	53	52	53	55	58	63	64	58	54	52	51	48
Fri	48	51	54	53	53	54	54	54	57	62	66	64	60	56	53	51	48
Sat	47	48	49	49	49	50	51	51	51	51	52	52	52	52	51	50	47
Sun	48	48	48	48	48	50	51	50	50	50	50	50	49	49	49	50	48

About this drive

On weekdays the 50-mile drive from Lake Forest to Fontana (via I-15 North and SR-241 North and SR-91 East) usually takes as little as 48 minutes and up to 66 minutes, when leaving around 3:30 pm on Fridays. The fastest times to leave are before 6:30 am or after 7:30 pm. Midday (11 am to 2 pm) it takes about 55 minutes. On weekends it is slowest around 3:30 pm on Saturdays (52 minutes).

About 42 miles of it is freeway, where times follow typical and live traffic from our sensors, and about 7 miles surface streets (10 to 15 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 Fontana 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 Fontana?

On weekdays, leave before 6:30 am or after 7:30 pm. The drive usually takes about 48 minutes then, versus up to 66 minutes at the worst times.

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

The 50-mile drive usually takes 48 to 66 minutes on weekdays, depending on when you leave, and about 55 minutes midday.

When is traffic worst from Lake Forest to Fontana?

Leaving around 3:30 pm on Fridays is usually slowest, about 66 minutes.

Freeways on this drive

SR-241 North in Orange County (12 miles) · SR-91 East in Orange County (11 miles) · I-15 North in Inland Empire (7 miles) · I-15 North in Orange County (5 miles) · I-10 East in Inland Empire (5 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

Fontana 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

Open the live traffic map →

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	48	52	58	55	54	54	54	55	56	59	63	65	59	54	53	51	48
Tue	48	53	58	56	54	53	53	54	55	59	63	63	59	54	52	51	48
Wed	48	53	57	57	53	54	54	54	54	57	60	60	60	53	54	51	48
Thu	48	52	57	55	53	53	52	53	55	58	63	64	58	54	52	51	48
Fri	48	51	54	53	53	54	54	54	57	62	66	64	60	56	53	51	48
Sat	47	48	49	49	49	50	51	51	51	51	52	52	52	52	51	50	47
Sun	48	48	48	48	48	50	51	50	50	50	50	50	49	49	49	50	48

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	48	52	58	55	54	54	54	55	56	59	63	65	59	54	53	51	48
Tue	48	53	58	56	54	53	53	54	55	59	63	63	59	54	52	51	48
Wed	48	53	57	57	53	54	54	54	54	57	60	60	60	53	54	51	48
Thu	48	52	57	55	53	53	52	53	55	58	63	64	58	54	52	51	48
Fri	48	51	54	53	53	54	54	54	57	62	66	64	60	56	53	51	48
Sat	47	48	49	49	49	50	51	51	51	51	52	52	52	52	51	50	47
Sun	48	48	48	48	48	50	51	50	50	50	50	50	49	49	49	50	48

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	48	52	58	55	54	54	54	55	56	59	63	65	59	54	53	51	48
Tue	48	53	58	56	54	53	53	54	55	59	63	63	59	54	52	51	48
Wed	48	53	57	57	53	54	54	54	54	57	60	60	60	53	54	51	48
Thu	48	52	57	55	53	53	52	53	55	58	63	64	58	54	52	51	48
Fri	48	51	54	53	53	54	54	54	57	62	66	64	60	56	53	51	48
Sat	47	48	49	49	49	50	51	51	51	51	52	52	52	52	51	50	47
Sun	48	48	48	48	48	50	51	50	50	50	50	50	49	49	49	50	48