Personal Stopovers on a Domestic Business Flight

For a primarily business domestic trip, a personal detour does not automatically make every transportation dollar deductible. The deductible business transportation generally is limited to the cost of the direct business route, with personal side-trip costs excluded. Preserve a reasonable contemporaneous comparison rather than assuming the final ticket is entirely business.

A specific business-owner situation

An owner flies from home to a customer meeting, adds a weekend in another city and then returns. The extra leg and any increased fare must be separated from the cost of traveling directly for the meeting.

Illustrative example, not a client result.

What to establish before filing

Establish the trip's primary business purpose.
Capture a comparable direct-route fare.
Separate detour fares lodging and other personal costs.

Which fact changes the answer?

An incidental personal stop costing no more than the direct business itinerary differs from a detour that increases transportation expense. The business-purpose and cost evidence must both support the deduction.

A mistake to avoid

Do not compare the purchased ticket with an unrelated expensive last-minute fare chosen after the trip.

Records that support the decision

Business meeting itinerary.
Dated comparable fare evidence.
Actual ticket and expense receipts.

The decision to document

Document the allowed transportation amount and handle any company-paid personal portion through the appropriate reimbursement or compensation process.

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Sources and editorial context

General educational information prepared with AI assistance. No individual professional review is claimed. Apply the relevant tax-year rules to the actual records. Editorial policy · AI disclosure.

I added a personal stopover to a domestic business flight. Can the company deduct the entire ticket?