USPS small packet delivery time from Oxnard California US to Durham UK

Parcel was shipped via USPS small packet on the 30 Aug 2017 from Oxnard California and delivered to the destination address in Durham UK on the 8 September 2017 which took about 8 days or 1 week delivery time. Below is the tracking info from USPS and Royal Mail post office.

USPS Post Office Tracking Number: LX305899500US

Delivered
Product & Tracking Information

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Postal Product:
Features:
Small Packet

DATE & TIME STATUS OF ITEM LOCATION
September 8, 2017, 9:19 am Delivered UNITED KINGDOM
Your item was delivered in UNITED KINGDOM at 9:19 am on September 8, 2017.
September 6, 2017, 8:37 pm Processed Through Facility UNITED KINGDOM
September 6, 2017, 6:57 pm Processed Through Facility UNITED KINGDOM
September 2, 2017, 12:37 pm Departed LONDON, UNITED KINGDOM
September 1, 2017, 6:07 pm Departed LOS ANGELES, UNITED STATES
September 1, 2017, 10:38 am Arrived LOS ANGELES, UNITED STATES
September 1, 2017, 12:42 am Processed Through Facility ISC LOS ANGELES CA (USPS)
September 1, 2017, 12:42 am Arrived at Facility ISC LOS ANGELES CA (USPS)
August 31, 2017, 6:02 am Arrived Shipping Partner Facility, USPS Awaiting Item TORRANCE, CA 90505
August 30, 2017, 4:01 pm Shipping Label Created, USPS Awaiting Item OXNARD, CA 93033

Royal Mail Post Office Tracking Item:
LX305899500US
from USA
Latest update: It's on its way
Your item, posted on 06/09/17 with reference LX305899500US has been received at our international mail centre and is being made ready for despatch overseas.
Date Time Status Track point
08/09/17 09:19 IN RECIPIENT PO BOX DURHAM PDO
08/09/17 06:01 AT DELIVERY OFFICE DURHAM PDO DURHAM PDO
08/09/17 00:09 ON ITS WAY TO DURHAM PDO TYNESIDE MAIL CENTRE
08/09/17 00:06 ARRIVED AT TYNESIDE MAIL CENTRE TYNESIDE MAIL CENTRE
06/09/17 20:37 ON ITS WAY TO TYNESIDE MAIL CENTRE HEATHROW WORLDWIDE DC
06/09/17 18:57 ARRIVED IN THE UK HEATHROW WORLDWIDE DC