Best Time to Drive from Costa Mesa to Rialto

Right now (6:48 pm PDT): about 59 minutes via SR-91 East and SR-55 North, usually 58 at this time.

Only 43% 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 Costa Mesa to Rialto 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	53	55	62	62	60	60	61	62	67	74	81	84	81	71	60	57	54
Tue	53	56	66	67	63	62	62	63	67	76	85	89	83	70	62	59	55
Wed	53	58	66	68	64	62	61	65	69	78	82	87	85	77	68	61	55
Thu	53	58	67	65	62	60	60	62	65	75	84	89	86	72	69	60	55
Fri	53	55	59	62	60	61	63	68	74	81	90	88	85	71	63	59	55
Sat	53	54	55	56	57	58	59	60	60	61	63	64	63	62	58	58	54
Sun	53	54	54	55	56	56	58	57	57	57	57	56	56	55	56	59	53

About this drive

On weekdays the 56-mile drive from Costa Mesa to Rialto (via SR-91 East and SR-55 North) usually takes as little as 53 minutes and up to 91 minutes, when leaving around 4:30 pm on Tuesdays. The fastest times to leave are before 6:30 am or after 8:30 pm. Midday (11 am to 2 pm) it takes about 67 minutes. On weekends it is slowest around 4:30 pm on Saturdays (66 minutes).

About 48 miles of it is freeway, where times follow typical and live traffic from our sensors, and about 8 miles surface streets (11 to 17 minutes on weekdays), estimated from how jammed the freeways around them are at that time. Drive times are measured from central Costa Mesa to central Rialto 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 Costa Mesa to Rialto?

On weekdays, leave before 6:30 am or after 8:30 pm. The drive usually takes about 53 minutes then, versus up to 91 minutes at the worst times.

How long does it take to drive from Costa Mesa to Rialto?

The 56-mile drive usually takes 53 to 91 minutes on weekdays, depending on when you leave, and about 67 minutes midday.

When is traffic worst from Costa Mesa to Rialto?

Leaving around 4:30 pm on Tuesdays is usually slowest, about 91 minutes.

Freeways on this drive

SR-91 East in Orange County (27 miles) · SR-55 North in Orange County (16 miles) · SR-91 East in Inland Empire (5 miles)

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

More drives

Rialto to Costa Mesa (return trip) · Costa Mesa to Los Angeles · Costa Mesa to Anaheim · Costa Mesa to Riverside · Costa Mesa to Santa Ana · Costa Mesa to Irvine · Costa Mesa to San Bernardino · Costa Mesa to Fontana · Costa Mesa to Moreno Valley · Costa Mesa to Glendale · Costa Mesa to Santa Clarita · Costa Mesa 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	53	55	62	62	60	60	61	62	67	74	81	84	81	71	60	57	54
Tue	53	56	66	67	63	62	62	63	67	76	85	89	83	70	62	59	55
Wed	53	58	66	68	64	62	61	65	69	78	82	87	85	77	68	61	55
Thu	53	58	67	65	62	60	60	62	65	75	84	89	86	72	69	60	55
Fri	53	55	59	62	60	61	63	68	74	81	90	88	85	71	63	59	55
Sat	53	54	55	56	57	58	59	60	60	61	63	64	63	62	58	58	54
Sun	53	54	54	55	56	56	58	57	57	57	57	56	56	55	56	59	53

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	53	55	62	62	60	60	61	62	67	74	81	84	81	71	60	57	54
Tue	53	56	66	67	63	62	62	63	67	76	85	89	83	70	62	59	55
Wed	53	58	66	68	64	62	61	65	69	78	82	87	85	77	68	61	55
Thu	53	58	67	65	62	60	60	62	65	75	84	89	86	72	69	60	55
Fri	53	55	59	62	60	61	63	68	74	81	90	88	85	71	63	59	55
Sat	53	54	55	56	57	58	59	60	60	61	63	64	63	62	58	58	54
Sun	53	54	54	55	56	56	58	57	57	57	57	56	56	55	56	59	53

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	53	55	62	62	60	60	61	62	67	74	81	84	81	71	60	57	54
Tue	53	56	66	67	63	62	62	63	67	76	85	89	83	70	62	59	55
Wed	53	58	66	68	64	62	61	65	69	78	82	87	85	77	68	61	55
Thu	53	58	67	65	62	60	60	62	65	75	84	89	86	72	69	60	55
Fri	53	55	59	62	60	61	63	68	74	81	90	88	85	71	63	59	55
Sat	53	54	55	56	57	58	59	60	60	61	63	64	63	62	58	58	54
Sun	53	54	54	55	56	56	58	57	57	57	57	56	56	55	56	59	53