Best Time to Drive from Chelmsford to Boston

Right now (10:18 pm EDT): about 35 minutes via I-93 South and I-495 North.

Typical drive time by departure time

Minutes from Chelmsford to Boston 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	32	41	52	57	47	39	35	38	37	44	50	47	46	41	33	33	34
Tue	32	45	66	73	62	47	37	35	35	46	54	54	61	51	35	33	34
Wed	31	42	61	70	62	46	39	36	36	48	58	58	62	53	36	33	34
Thu	32	41	57	68	58	44	38	36	38	50	62	59	63	56	38	34	34
Fri	31	34	42	42	38	36	37	38	44	55	57	57	53	45	38	34	33
Sat	31	31	31	31	32	36	38	41	42	41	43	41	39	39	35	34	33
Sun	31	30	30	31	31	34	35	38	40	40	39	38	36	36	35	34	34

About this drive

On weekdays the 34-mile drive from Chelmsford to Boston (via I-93 South and I-495 North) usually takes as little as 31 minutes and up to 73 minutes, when leaving around 8 am on Tuesdays. The fastest times to leave are before 5:30 am or after 8 pm. Midday (11 am to 2 pm) it takes about 39 minutes. On weekends it is slowest around 2:30 pm on Saturdays (43 minutes).

Drive times are measured from central Chelmsford to central Boston 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 Chelmsford to Boston?

On weekdays, leave before 5:30 am or after 8 pm. The drive usually takes about 31 minutes then, versus up to 73 minutes at the worst times.

How long does it take to drive from Chelmsford to Boston?

The 34-mile drive usually takes 31 to 73 minutes on weekdays, depending on when you leave, and about 39 minutes midday.

When is traffic worst from Chelmsford to Boston?

Leaving around 8 am on Tuesdays is usually slowest, about 73 minutes.

Freeways on this drive

I-93 South in Boston (26 miles) · I-495 North in Boston (7 miles)

Boston traffic right now · Boston traffic tomorrow

More drives

Boston to Chelmsford (return trip)

Open the live traffic map →

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	32	41	52	57	47	39	35	38	37	44	50	47	46	41	33	33	34
Tue	32	45	66	73	62	47	37	35	35	46	54	54	61	51	35	33	34
Wed	31	42	61	70	62	46	39	36	36	48	58	58	62	53	36	33	34
Thu	32	41	57	68	58	44	38	36	38	50	62	59	63	56	38	34	34
Fri	31	34	42	42	38	36	37	38	44	55	57	57	53	45	38	34	33
Sat	31	31	31	31	32	36	38	41	42	41	43	41	39	39	35	34	33
Sun	31	30	30	31	31	34	35	38	40	40	39	38	36	36	35	34	34

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	32	41	52	57	47	39	35	38	37	44	50	47	46	41	33	33	34
Tue	32	45	66	73	62	47	37	35	35	46	54	54	61	51	35	33	34
Wed	31	42	61	70	62	46	39	36	36	48	58	58	62	53	36	33	34
Thu	32	41	57	68	58	44	38	36	38	50	62	59	63	56	38	34	34
Fri	31	34	42	42	38	36	37	38	44	55	57	57	53	45	38	34	33
Sat	31	31	31	31	32	36	38	41	42	41	43	41	39	39	35	34	33
Sun	31	30	30	31	31	34	35	38	40	40	39	38	36	36	35	34	34

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	32	41	52	57	47	39	35	38	37	44	50	47	46	41	33	33	34
Tue	32	45	66	73	62	47	37	35	35	46	54	54	61	51	35	33	34
Wed	31	42	61	70	62	46	39	36	36	48	58	58	62	53	36	33	34
Thu	32	41	57	68	58	44	38	36	38	50	62	59	63	56	38	34	34
Fri	31	34	42	42	38	36	37	38	44	55	57	57	53	45	38	34	33
Sat	31	31	31	31	32	36	38	41	42	41	43	41	39	39	35	34	33
Sun	31	30	30	31	31	34	35	38	40	40	39	38	36	36	35	34	34