Flights

Flight costs for genuine business journeys are allowable, but commuting by air is excluded on the same basis as any other commuting, and mixed business-and-leisure trips require careful apportionment.

Sole traderAllowable

Ltd companyAllowable

EmployeeConditional

Conditions

Flights for qualifying business journeys are an allowable travel cost. HMRC's self-employed expenses guidance explicitly includes 'air' fares in its list of allowable travel costs alongside train, taxi, bus and tram fares (GOV.UK, updated November 2024). The self-employed test is whether the journey is wholly and exclusively for the trade.
Distance does not change the commuting rule. A regular flight from, say, Edinburgh to London Stansted to reach your permanent place of work is commuting and is not allowable — the same principle applies to any mode of transport.
Where a flight combines business and personal travel, only the business element is allowable. If the flight itself was taken solely for business and you tagged on a personal extension at the destination, the entire flight fare may be defensible; if the trip is genuinely mixed from the outset, careful apportionment (or possible full disallowance) applies. Keep clear records of the business purpose and seek advice on mixed-purpose international trips.
For a limited company, flights for directors and employees on qualifying business trips are an allowable cost for corporation tax purposes, and no benefit-in-kind arises where the travel is wholly for business.
HMRC does not specify that only economy fares are allowable, but costs must be reasonable. Standard fares are straightforwardly accepted; upgrades to business or first class on short domestic routes are harder to justify. For long-haul overnight journeys where arriving fit to work is a genuine commercial need, business class is more likely to be accepted.

Common mistakes

Treating a regular flight to a permanent work location as business travel because flying feels different from commuting.
Claiming the full cost of a flight that includes a personal holiday element without apportioning or documenting the business and private legs.
Not keeping boarding passes or e-ticket records alongside the purchase receipt — digital boarding passes can be saved easily and should be.

What to keep

Flight booking confirmation and payment receipt.
Boarding passes where possible (digital copies are fine).
A note of the business purpose of the journey.

Real-world example

A sole-trader film producer flies from London to Glasgow for a two-day client shoot and returns the same week. The return flights are an allowable business travel cost. If she stays on an extra three days for a personal holiday, the flights are still allowable (the journey was solely for business) but any accommodation after the shoot ends is not.

Frequently asked

Can I fly business class and claim it?

HMRC requires travel costs to be reasonable. Economy fares are straightforwardly allowable; business or first class on a short domestic route would need justification. On a long-haul overnight flight where arriving fit to work is a genuine commercial requirement, business class is more defensible. Be prepared to explain why the upgrade was necessary for the work.

I extended a business trip abroad into a holiday — can I claim the flights?

If the return flight would have been booked regardless and the holiday was a bolt-on at the destination, the full return fare is likely allowable. If the holiday was planned alongside the business trip from the outset and influenced the routing or dates, the position is less clear — apportion carefully and take professional advice.

Not sure how this applies to you?

The rules shift with your circumstances. A qualified accountant can confirm what you can claim and handle it for you.

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Related allowances

Source: HMRC guidance · Last checked 2026-06-18

This page is general information based on HMRC published guidance, not tax advice. Status shown is a plain-English summary — your own position can differ. Always check the HMRC source above and speak to a qualified accountant before making a claim.