Traffic Predict
Best Time to Drive from Costa Mesa to Rialto
Right now (7:20 pm PST): about 67 minutes via SR-91 East and SR-55 North, usually 61 at this time.
Only 39% 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
| Leave | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mon | 52 | 55 | 62 | 65 | 61 | 61 | 61 | 63 | 66 | 73 | 82 | 86 | 84 | 72 | 62 | 58 | 53 |
| Tue | 53 | 56 | 66 | 68 | 64 | 62 | 62 | 63 | 67 | 77 | 87 | 92 | 88 | 76 | 68 | 60 | 55 |
| Wed | 53 | 58 | 65 | 69 | 64 | 62 | 61 | 65 | 68 | 78 | 84 | 88 | 87 | 78 | 67 | 61 | 55 |
| Thu | 53 | 58 | 66 | 66 | 63 | 61 | 62 | 63 | 67 | 75 | 85 | 91 | 88 | 77 | 68 | 60 | 54 |
| Fri | 53 | 56 | 60 | 64 | 61 | 62 | 64 | 68 | 75 | 82 | 92 | 90 | 86 | 74 | 64 | 59 | 55 |
| Sat | 52 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 60 | 62 | 64 | 65 | 64 | 63 | 61 | 58 | 53 |
| Sun | 53 | 54 | 54 | 54 | 55 | 56 | 57 | 57 | 58 | 57 | 57 | 57 | 57 | 58 | 57 | 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 52 minutes and up to 94 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 68 minutes. On weekends it is slowest around 3:30 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 19 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 52 minutes then, versus up to 94 minutes at the worst times.
How long does it take to drive from Costa Mesa to Rialto?
The 56-mile drive usually takes 52 to 94 minutes on weekdays, depending on when you leave, and about 68 minutes midday.
When is traffic worst from Costa Mesa to Rialto?
Leaving around 4:30 pm on Tuesdays is usually slowest, about 94 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