Mail Time: UK to USA Letter Delivery Takes 6–10 Business Days

Sending a standard letter (up to 100 g) from the United Kingdom to the United States via Royal Mail International Standard (formerly Airmail) typically takes:

Delivery Window

6–10 business days (average 7–8)

Service Options & Speed

Factors Affecting Speed

• Customs: All mail >£135 value or commercial items cleared; letters rarely delayed.
• USPS last-mile: Royal Mail hands to USPS at JFK/ORD/LAX; local delivery adds 1–3 days.
• Holidays: Christmas, Thanksgiving, UK bank holidays add 2–5 days.
• Weather/disruptions: Volcanic ash, strikes, pandemics.

Address Format for Speed

Recipient Name
Street Address
City, STATE ZIP CODE
UNITED STATES OF AMERICA

Use ZIP+4 if known. Print clearly. Include sender UK return address.

Cost (2024 Royal Mail Rates)

• Letter (100g): £2.80 (Standard), £7.85 (Tracked & Signed)
• Large letter (750g): £4.50 / £9.85

For time-sensitive documents: use tracked courier. For a postcard to grandma: Standard is fine.