1. Research Entry Requirements and Restrictions

Before making any travel arrangements, review the CDC and USDA import guidelines for pets entering the United States. These include:

• Mandatory rabies vaccinations
• A valid health certificate issued shortly before travel
• In some cases, microchip verification

Colorado follows federal regulations, but it’s wise to be mindful of Denver’s altitude and climate, which may affect pet travel timing and airline guidance. Confirm any additional airline-specific breed or size restrictions ahead of time. PetAir UK can help interpret both national and local rules to avoid customs issues.

2. Consult Your Vet

Speak with your vet well in advance of your flight to:

• Verify vaccination status—especially rabies
• Implant a microchip if one is not already in place
• Address any respiratory or cardiac issues that may be affected by high altitude
• Obtain a health certificate within 10 days of travel

Discuss possible altitude acclimation for pets sensitive to oxygen levels. Your vet can also recommend strategies for keeping your pet calm and healthy during the journey.

3. Secure the Right Travel Crate

Choose a crate that complies with IATA (International Air Transport Association) standards. It should:

• Be large enough for your pet to stand, lie down, and turn comfortably
• Include secure latches and ventilation on at least three sides
• Feature extra padding or a waterproof liner, especially for Denver’s unpredictable weather

Begin crate training early to make the crate a safe and familiar space. PetAir UK can advise on crate selection tailored to your pet’s size and travel needs.

4. Understand Airline Policies

Airlines vary widely in their pet travel policies. Consider:

• Whether your pet must travel in the cargo hold or may accompany you in the cabin
• Breed restrictions, particularly for brachycephalic (flat-faced) breeds
• Altitude or climate-specific considerations at Denver International Airport
• Required documentation and crate sizing rules

Book early, opt for direct flights to Denver when possible, and review your airline’s pet policies thoroughly to avoid any surprises.

5. Sort Out the Paperwork

Rabies is MANDATORY in Texas & Florida, and also when flying to any US destination with American Airlines. Although not always required by federal law, rabies vaccination is highly recommended before travel.
Documents you’ll need include:

• A current rabies certificate
• A microchip registration record
• A health certificate issued within 10 days of travel
• Additional CDC paperwork if your pet has visited a high-risk rabies country

Carry both printed and digital copies in an organised travel folder. PetAir UK offers document review services to make sure all paperwork is complete and up to date.

6. Plan Your Travel Timetable

Denver has four very distinct seasons and sudden weather shifts:

• Summer: Dry and hot—travel in early morning or evening to avoid heat
• Winter: Cold and snowy—prepare for freezing temperatures
• Spring/Autumn: Unpredictable—check the forecast and avoid extreme weather

Plan time for:

• Final vet checks
• Crate acclimatisation
• Customs and check-in procedures

Avoid peak travel dates to reduce congestion and limit stress for your pet.

7. Consider Using a Specialist Pet Shipper

A specialist service like PetAir UK can take care of:

• Paperwork and compliance
• Airline and customs coordination
• Veterinary certification and crate advice
• Logistics tailored to altitude and weather concerns in Denver

Pet shippers are especially helpful if your pet is older, has special medical needs, or if this is your first time managing international relocation.

8. Prepare for Arrival in Denver

At Denver International Airport (DEN):

• Collect your pet from the cargo facility or oversized baggage area
• Be ready for customs and USDA inspection
• Bring warm gear in winter (blanket, jacket) or cooling accessories in summer

The airport is large, so allow plenty of time to reach the pet collection point. Confirm that your transportation is pet-friendly and that your final destination is set up with essentials like water, food, and bedding.

9. Alleviating Pet Stress and Anxiety

Long-distance relocation can cause anxiety for pets. Ease the transition by:

• Starting crate training several weeks ahead of time
• Maintaining regular feeding and walking routines
• Using familiar toys or bedding during and after travel
• Consulting your vet about calming sprays or supplements if necessary

Let your pet adjust to their new environment gradually and limit overwhelming stimuli in the early days.

10. Settling into Life in Denver

Denver is a pet-friendly city with abundant outdoor spaces and pet-focused amenities:

• Register your pet with the City of Denver
• Find a trusted local veterinarian
• Take advantage of dog parks, mountain trails, and pet-friendly cafés
• Ensure adequate hydration—altitude increases the need for water
• In winter, use protective boots and coats for extended outdoor activities
• Ease your pet into socialisation with local dogs and new environments

With time, patience, and a bit of planning, your pet can thrive in Denver’s vibrant, active lifestyle.