The clear 2026 guide to flying a pet via Heathrow — how the Animal Reception Centre (HARC) works, the import and export rules, what it costs, IATA crates and breed limits, and how assistance dogs differ. Plus pet-friendly RushXO transfers to and from the airport.
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Flying a pet through Heathrow is very different from packing a suitcase — and the single most important thing to know up front is that most pets don’t travel in the cabin. They fly as manifest cargo in the hold and pass through a dedicated animal border facility for veterinary and document checks before they’re released to you. This guide explains exactly what happens, the rules and costs, how to give your pet the smoothest possible journey, and how the process differs for assistance dogs.
How they fly: most pets travel as cargo in the hold, not the cabin, and go through HARC (or the airline’s AAC facility) for checks.
Rules: Pet Travel Scheme — microchip, rabies vaccination, and a pet passport or GB Animal Health Certificate; tapeworm treatment for some destinations.
Cost: HARC import boarding from ~£203 (pre-checked) or ~£279, +£52 per extra pet — plus airline, crate, AHC and a customs agent.
Assistance dogs: cabin-eligible, separate process — HARC approval 72 hours ahead, airline told 48 hours ahead.
Unlike some countries, the UK generally does not allow pets to travel in the passenger cabin into Heathrow. With the exception of recognised assistance dogs, your dog or cat will travel as manifest cargo in a pressurised, temperature-controlled section of the hold — conditions kept similar to the cabin — booked through the airline’s cargo service rather than as hand luggage.
That means your pet’s journey runs on a separate track from yours: they’re loaded and unloaded by trained staff, taken to the animal reception facility, checked, and released to you after you’ve cleared your own arrival. Modern aircraft holds used for live animals are pressurised and temperature-controlled to IATA Live Animals Regulations standards.
Arriving pets don’t go to baggage reclaim — they go to a dedicated live-animal border facility. Here’s the journey.
Trained staff collect your pet from the plane and transport it to the facility in a climate-controlled vehicle — no time spent on the open tarmac.
Your pet is released into its own kennel with fresh water, food and bedding. Dogs get access to an outdoor run; cats get a litter tray.
Staff check the paperwork for compliance with the Pet Travel Scheme — microchip, vaccinations and certificates — and complete customs clearance.
A visual welfare check makes sure your pet has travelled well. If anything is unclear, staff may contact your vet, agent or airline to resolve it.
Once cleared, you collect your pet from the facility. Holding time varies from about an hour to several, depending on origin and paperwork.
Two facilities serve Heathrow: HARC (government-run, all species) and Animal Aircare (AAC, private). The airline decides which — BA and IAG Cargo typically use AAC; most others HARC.
The Heathrow Animal Reception Centre, near Terminal 4, has been run by the City of London Corporation since 1977 and is the only Heathrow facility licensed for every species — handling around 22,000 dogs and cats a year alongside horses, reptiles, birds and fish. It has free customer parking for collections.
The Pet Travel Scheme (PETS) lets eligible pets enter the UK without quarantine — if the documentation is exactly right. Most delays at the border come from paperwork errors, so check everything twice.
| Requirement | Detail |
|---|---|
| Microchip | A working ISO microchip, fitted before the rabies vaccination |
| Rabies vaccination | Valid and in date; timing rules apply before travel |
| Pet passport or AHC | A valid passport (Part 1 country, or GB-issued before 1 Jan 2021) or a GB Animal Health Certificate, valid for entry within 10 days of issue (and up to 4 months’ onward EU travel) |
| Tapeworm treatment | Dogs flying directly to certain countries (e.g. Finland, Ireland, Northern Ireland, Norway, Malta) |
| Approved route & cargo booking | Travel via an approved route; pets booked as manifest cargo in the hold |
| UK customs agent | Required on import — appoint one whether or not you use a shipper |
Exporting from GB? You’ll typically need an Export Health Certificate (and, in GB, an export application form), with checks by an official vet. Heading to the EU? Note that GB-issued pet passports are no longer valid for EU or Northern Ireland travel — you’ll need an AHC for each trip. Rules vary by destination and origin; always verify on GOV.UK.
The HARC fee is only one line on the bill. Plan for several separate costs:
A professional, accredited pet-relocation company (look for IPATA/IATA membership) bundles most of this — flight booking, crate, check-in and customs — which is why many owners use one for anything beyond a simple short hop.
Having your Pet Travel Scheme paperwork pre-checked lowers the HARC boarding fee and, more importantly, heads off the document errors that cause delays at the border. Ask your agent or vet about it.
The crate: airlines follow strict IATA guidelines — the container must be strong, secure and big enough for your pet to stand, sit, lie down and turn around naturally. As a rough sizing guide, the crate length should be at least your pet’s nose-to-tail length plus half a leg length, and its height at least your pet’s full standing height. A correctly sized, sturdy crate makes the journey far calmer, so measure carefully (or have a shipper build one).
Breed restrictions: many airlines restrict or refuse brachycephalic (flat-faced) breeds — bulldogs, pugs, Persian cats and similar — because their breathing can struggle at altitude. If you have one of these breeds, check your airline’s policy early; it may shape which carrier and route you can use.
Recognised assistance dogs are treated very differently from pets. They can travel in the cabin with their owner and don’t go through the cargo kennelling process — but they still must meet the standard dog entry requirements and get specific approvals. The numbers are rising fast: Heathrow’s reception centre handled around 1,800 assistance animals in a recent year, up more than 110% since 2021.
The key steps:
For the full range of accessibility support beyond dogs, see our forthcoming Heathrow special assistance guide.
Every Heathrow terminal now has dedicated relief areas with hard and soft surfaces where animals can go to the toilet, both before security and airside. They’re calm, hygienic and signposted — but note that you must bring your own waste bags, as these aren’t provided (bins are). Exact locations vary by terminal and level, so follow the signage or ask a member of staff, and check Heathrow’s official assistance-dog page for the current list before you travel.
The cargo and border process is handled by your airline, HARC or a specialist shipper — that part isn’t something a taxi can do. What RushXO can do is the human side of the day, calmly and door-to-door:
To keep everyone comfortable, let us know the type and size of your pet (and whether it’s an assistance dog) at the time of booking so we send the right vehicle. See our main Heathrow taxi service for fares and vehicles.
RushXO carries you and your pet as passengers by arrangement. We don’t arrange live-animal air cargo, crates or border paperwork — that’s your airline or an accredited pet shipper. We simply make the ground journey at either end calm and easy.
Plan the rest of your trip — transfers, parking, getting into London and more.