Business travel expenses are costs you incur when traveling away from your main place of business for work. These can include airfare, hotels, rental cars, meals, and other necessary expenses while conducting business.
To be deductible, the trip must be ordinary, necessary, and primarily for business purposes. You must also keep good records, such as receipts and a clear explanation of the business purpose.
Claiming business travel expenses can significantly reduce the taxable income of self-employed individuals and business owners.
For more information click in this link: IRS.gov