Moving Your Pet from UK to US: Complete Travel Guide

Moving Your Dog or Cat from the UK to the US: A Complete Travel Guide

I still remember the moment I made the decision. My job offer in Boston felt surreal—exciting, terrifying, and suddenly very real when I looked at Koda, my 25 kg Labrador mix, sleeping on the kitchen tiles. The question wasn't whether he was coming with me. It was how. I'd never moved a pet internationally before, and the thought of navigating paperwork, airlines, and regulations while managing my own relocation felt overwhelming. But as I sat there watching him dream-run in his sleep, I knew I'd figure it out. This guide is what I wish I'd had when I started.

Understanding the Basics: What's Required

The United Kingdom and United States both allow dogs and cats to enter, but they have specific requirements that aren't optional—they're legal. Before you book a single flight, understand that your pet needs:

• A microchip (ISO 11784/11785 standard)
• A rabies vaccination
• An official health certificate endorsed by APHA (Animal and Plant Health Agency)
• For dogs: tapeworm treatment with Praziquantel

The good news? If you get everything right, your pet won't be quarantined when arriving in the US. Zero days. That was the moment I exhaled.

Step 1: The Microchip (Weeks 1–2)

If Koda didn't already have a microchip, this would be my first stop. The UK requires an ISO 11784/11785 standard microchip, and here's the critical part: the microchip must be implanted before or at the same time as the first rabies vaccination. Your vet will implant it (usually under the shoulder blade), and you'll receive documentation with the microchip number. Keep this safe. You'll need it for everything that follows.

Koda already had his, which saved me one vet visit, but I made sure the registration details were current. The microchip is your pet's international ID—it's how customs and vets will identify him if anything goes wrong.

Step 2: Rabies Vaccination (Weeks 2–4)

This is non-negotiable. Both the UK and US require a current rabies vaccination. Here's what matters:

• Your pet must be at least 12 weeks old at vaccination
• The vaccine must be administered by an authorised vet
• You must wait 21 days after vaccination before travel
• The vaccine must be current (not expired)

I scheduled Koda's booster appointment and marked my calendar for exactly 21 days later. That waiting period felt eternal, but it's non-negotiable—the vaccine needs time to create immunity, and customs won't accept documentation that violates this timeline.

Step 3: Tapeworm Treatment for Dogs (24–120 Hours Before Departure)

Here's where I nearly made a mistake. Dogs travelling from the UK to the US require tapeworm treatment with Praziquantel. This isn't optional, and the timing is strict: the treatment must be administered between 24 and 120 hours before arrival in the US.

For Koda, this meant scheduling the treatment for the day before our flight. The vet documented it in writing (you'll need this proof), and I kept the receipt. The minimum dose is 5 mg per kilogram of body weight. At 25 kg, Koda needed 125 mg. Your vet will calculate this, but it's worth double-checking.

Note: Cats do not require tapeworm treatment for US entry, though it's always worth discussing with your vet.

Step 4: Health Certificate from APHA (Weeks 5–6)

This is the official document that proves your pet is healthy and meets all requirements. Here's what you need to know:

• It must be issued by an official vet (not a vet tech or nurse)
• It must be endorsed by APHA (Animal and Plant Health Agency)
• It's valid for only 10 days, so time it carefully
• It must be the original document (not a photocopy)

I booked my appointment with the vet 10 days before departure. The vet examined Koda, confirmed his microchip number, verified his rabies vaccination, and issued the certificate. The APHA endorsement happens automatically when an authorised vet issues it. I received the original, and I carried it in a folder with all other documents.

Step 5: CDC Dog Import Form (If Required)

The US CDC requires a Dog Import Form (CDC 6.2) for all dogs entering the country. Since the UK is not classified as a CDC high-risk rabies country, Koda didn't need additional titer testing or CDC approval. However, you'll still need to complete the form and have it ready at arrival. Check the CDC's dog import page to confirm your pet's origin country status.

Choosing Your Airline and Flight

This is where Koda's size became a factor. At 25 kg, he exceeded the cabin weight limit for every airline on this route. Most carriers allow pets up to 8 kg in the cabin. For larger pets like Koda, cargo is the only option.

I chose British Airways because they offered cargo service and had experience with international pet transport. The process was more complex than cabin travel—I had to arrange a pet-specific cargo handler, book a temperature-controlled crate, and coordinate pickup and delivery. But Koda arrived safely, and that's what mattered.

If your pet weighs under 8 kg, you have more options. Air France and Lufthansa offer cabin travel at €75, while Delta and United charge $125–$150. All airlines ban brachycephalic breeds (flat-faced dogs like Bulldogs and Pugs) from cargo due to respiratory risks—check the brachycephalic breed guide if this applies to you.

Preparing Your Pet for the Journey

Beyond paperwork, your pet needs practical preparation. For Koda, I:

• Ensured he was comfortable in his travel crate (weeks of practice)
• Updated his collar and ID tag with my new US phone number
• Packed his regular food (airlines sometimes provide unfamiliar brands)
• Brought vaccination records and microchip documentation
• Arranged for a pet-friendly hotel in Boston for the first week

The emotional side was harder than the logistics. Watching him board the cargo plane felt surreal. But knowing every document was in order, every requirement met, made it manageable.

Arrival in the United States

Here's the relief: if your documentation is complete and correct, your pet will not be quarantined. Koda cleared customs without delay. The CDC inspector verified his health certificate, checked his microchip, and confirmed his tapeworm treatment documentation. Within an hour, he was in my arms.

Have all documents ready at arrival:

• Original APHA health certificate
• Microchip documentation
• Rabies vaccination proof
• Tapeworm treatment receipt
• CDC Dog Import Form (completed)

After Arrival: US Registration

Once you're in the US, register your pet with your state and local authorities. Requirements vary by state, but most require proof of rabies vaccination. Update your microchip registration with your new US address immediately. This is how you'll be contacted if Koda ever gets lost.

Common Mistakes to Avoid

• Timing the health certificate wrong: It's valid for only 10 days. Too early, and it expires before arrival. Too late, and you're rushing.
• Missing the tapeworm window: 24–120 hours before arrival is strict. Missing this means your pet can be refused entry.
• Not confirming airline cargo procedures: Each airline has different requirements for crates, documentation, and pickup. Call ahead.
• Forgetting the microchip must precede vaccination: If your pet doesn't have a microchip, get it done before the rabies shot.

Your Next Steps

Start now. Create a timeline working backward from your travel date. Week 1: microchip (if needed). Weeks 2–4: rabies vaccination and 21-day wait. Week 5: health certificate appointment. Week 6: tapeworm treatment and flight. This isn't something you can rush.

For a detailed checklist of everything you need, see our documents checklist. If you're flying with a smaller pet in the cabin, read our guide on flying with a dog.

Moving internationally with a pet is stressful, but it's absolutely doable. Koda is now settled in Boston, running on the Charles River Esplanade, and I'm grateful every day that I took the time to get it right. Your pet is worth the effort.

Get your free personalized travel plan from Pawgo to organize your pet's specific requirements and timeline.

This guide is based on official requirements from APHA (UK), CDC (US), and current airline policies. Data is verified from government sources and automatically updated. Always confirm requirements with your vet and airline before travel, as regulations can change.