Look up per diem reimbursement rates and mileage deductions for business travel worldwide.

Complete
United Kingdom → Oakland, Alameda County, California, United States
Item Name Destination Amount Conditions
Meals Los Angeles, United States of America 28.5 USD per day Over 5 hours rate: covers subsistence expenses for a period of more than 5 but less than 10 hours, measured by reference to the times of arrival in and departure from the foreign country.
Meals Los Angeles, United States of America 72 USD per day Over 10 hours rate: covers subsistence expenses for a period of more than 10 but less than 24 hours, measured by reference to the times of arrival in and departure from the foreign country.
Meals and incidentals Los Angeles, United States of America 93 USD per day 24 hour rate: covers the total cost of meals and daily hotel-to-office travel for a full 24-hour period.; The actual room rate is paid in addition to this amount (source shows the rate as 'plus room rate').
Lodging Los Angeles, United States of America 193 USD per night No specific conditions
Breakfast Los Angeles, United States of America 12.5 USD per meal No specific conditions
Lunch Los Angeles, United States of America 24.5 USD per meal No specific conditions
Dinner Los Angeles, United States of America 40 USD per meal No specific conditions
Incidentals Los Angeles, United States of America 0 USD per day Source row labelled 'Other': other expenses incurred during the day; employers may use the individual meal and other rates instead of the over 5 hour, over 10 hour and 24 hour rates.
Drinks Los Angeles, United States of America 7.5 USD per day No specific conditions
Transport Los Angeles, United States of America 8.5 USD per day Covers daily travel between the employee's hotel and office.
Total residual Los Angeles, United States of America 93 USD per day Total residual rate: intended to cover the total cost of meals in a period of 24 hours plus the cost of daily travel between the employee’s hotel and office; the 24 hour rate is the sum of the room rate and this total residual rate.
Meals San Francisco, United States of America 21 USD per day Over 5 hours rate: covers subsistence expenses for a period of more than 5 but less than 10 hours, measured by reference to the times of arrival in and departure from the foreign country.
Meals San Francisco, United States of America 71.5 USD per day Over 10 hours rate: covers subsistence expenses for a period of more than 10 but less than 24 hours, measured by reference to the times of arrival in and departure from the foreign country.
Meals and incidentals San Francisco, United States of America 99.5 USD per day 24 hour rate: covers the total cost of meals and daily hotel-to-office travel for a full 24-hour period.; The actual room rate is paid in addition to this amount (source shows the rate as 'plus room rate').
Lodging San Francisco, United States of America 190.5 USD per night No specific conditions
Breakfast San Francisco, United States of America 20.5 USD per meal No specific conditions
Lunch San Francisco, United States of America 16.5 USD per meal No specific conditions
Dinner San Francisco, United States of America 46.5 USD per meal No specific conditions
Incidentals San Francisco, United States of America 0 USD per day Source row labelled 'Other': other expenses incurred during the day; employers may use the individual meal and other rates instead of the over 5 hour, over 10 hour and 24 hour rates.
Drinks San Francisco, United States of America 8.5 USD per day No specific conditions
Transport San Francisco, United States of America 7.5 USD per day Covers daily travel between the employee's hotel and office.
Total residual San Francisco, United States of America 99.5 USD per day Total residual rate: intended to cover the total cost of meals in a period of 24 hours plus the cost of daily travel between the employee’s hotel and office; the 24 hour rate is the sum of the room rate and this total residual rate.

Source URL:
https://www.gov.uk/guidance/expenses-rates-for-employees-travelling-outside-the-uk
This source provides official travel rate information from gov.uk.