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Windsor Entry Requirements

Windsor Entry Requirements

Visa, immigration, and customs information

Important Notice Entry requirements can change at any time. Always verify current requirements with official government sources before traveling.
Windsor, California is served by Charles M. Schulz, Sonoma County Airport (STS) 8 miles north and San Francisco International Airport (SFO) 65 miles south. Most international visitors clear U.S. immigration at their first U.S. port of entry, then fly or drive the remaining distance to Windsor. Entry is governed by United States federal law, so Windsor follows the same visa, customs, and health rules as any U.S. destination. Travelers should prepare all documents before departure, as U.S. border officers have final authority on admission. Arriving passengers can expect digital kiosks at major airports and face-to-face interviews at smaller ones. Processing times vary from 5 minutes at STS to 30, 45 minutes at busy terminals such as SFO. Have your passport, visa or ESTA approval, return or onward ticket, and proof of accommodation ready. Windsor's small-town setting does not relax federal scrutiny. Officers will ask about the purpose and length of your stay even if you are only visiting local wineries or planning day trips to nearby Sonoma beaches.

Visa Requirements

Entry permissions vary by nationality. Find your category below.

Visa-Free Entry
90 days per entry

Citizens of 40 countries may enter under the U.S. Visa Waiver Program (VWP).

Includes
United Kingdom Germany France Italy Spain Netherlands Sweden Norway Denmark Finland Ireland Portugal Belgium Luxembourg Austria Switzerland Japan South Korea Singapore Brunei Australia New Zealand Chile Taiwan

ESTA pre-approval is still required; VWP travel cannot be extended beyond 90 days.

Electronic Travel Authorization (ESTA)
90 days per visit, valid for two years or until passport expires

Even visa-free travelers must obtain ESTA online before departure.

Includes
All Visa Waiver Program countries listed above
How to Apply: Apply on the official DHS website. Most approvals arrive within minutes, allow 72 hours.
Cost: USD 21

Print or save the approval email. Airlines check ESTA before boarding.

Visa Required
Usually granted for 6 months per entry

Citizens of countries not in the Visa Waiver Program must apply for a B-2 Tourist Visa.

How to Apply: Schedule an interview at the nearest U.S. embassy or consulate, pay the MRV fee, and present documents showing strong ties to home country.

Processing times range from a few days to several weeks depending on location.

Arrival Process

Whether you fly into STS or arrive by road, expect standard U.S. border formalities.

1
Primary Inspection
Present your passport, visa or ESTA approval, and customs form to the officer. Digital fingerprints and a photograph are taken.
2
Baggage Claim & Secondary Screening
Collect checked bags. Some passengers are directed to a secondary table for additional questioning or bag inspection.
3
Exit to Landside
Proceed to ground transportation. Rental-car counters are inside STS; rideshare pickup zones are clearly marked outside baggage claim.

Documents to Have Ready

Passport
Must be valid for the entire stay and machine-readable.
ESTA or U.S. Visa
Carry printed approval for ESTA, or the visa foil in passport.
Return or onward ticket
Proof you will leave the U.S. within the authorized period.
Address in Windsor
Hotel confirmation, Airbnb address, or friend's home to show where you'll stay.

Tips for Smooth Entry

Complete the CBP One mobile app digital customs form before landing at SFO to shorten queue time.
Have your Windsor hotel or host phone number ready. Officers sometimes call to confirm.
If driving from Canada or Mexico, be prepared for agricultural inspection at the border.

Customs & Duty-Free

Regardless of arrival airport, you clear U.S. customs before reaching Windsor. California has strict agricultural rules.

Alcohol
1 litre of spirits or 2 litres of wine per adult (21+)
Anything above this is dutiable; Sonoma County customs officers know wine values.
Tobacco
200 cigarettes or 50 cigars or 2 kg of loose tobacco
You must be 21+ to import tobacco into California.
Currency
USD 10,000 or equivalent must be declared
Applies to cash, traveler's checks, money orders combined.
Gifts/Goods
USD 800 total value per person duty-free
Family members may combine limits if traveling together.

Prohibited Items

  • Fresh fruit, plants, seeds, strict California agriculture rules
  • Meat products from most countries, foot-and-mouth disease restrictions

Restricted Items

  • Medications containing controlled substances, carry original prescription and doctor's letter

Health Requirements

No vaccinations are required for entry into Windsor. But routine immunizations are recommended.

Recommended Vaccinations

  • MMR
  • Tdap
  • influenza (seasonal)
  • COVID-19

Health Insurance

United States does not provide free healthcare. Purchase travel insurance that covers medical evacuation. Carry proof of insurance.

Current Health Requirements: As of June 2024, COVID-19 vaccination is no longer required for entry. But testing rules can change quickly. Check CDC.gov before departure.

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Comprehensive coverage for medical emergencies, trip cancellation, lost luggage, and 24/7 emergency assistance. Many countries recommend or require travel insurance.

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Important Contacts

Essential resources for your trip.

Embassy/Consulate
Find the nearest embassy or consulate through your own government's travel advisory website.
San Francisco hosts the largest consular corps on the West Coast.
Immigration Authority
U.S. Customs and Border Protection
Visit cbp.gov for official ESTA and visa information.
Emergency
Dial 911 for police, fire, or ambulance in Windsor and throughout the United States.
Non-urgent police matters in Windsor can contact Sonoma County Sheriff at +1 707-565-2121.

Special Situations

Additional requirements for specific circumstances.

Traveling with Children

If only one parent is present, carry notarized consent from the other parent or proof of sole custody. Birth certificates help verify relationships.

Traveling with Pets

Dogs and cats need a CDC Dog Import Form (for dogs) and rabies certificate. Contact Sonoma County Animal Services at +1 707-565-7100 for local requirements.

Extended Stays

B-2 tourist visa holders can apply for a 6-month extension using USCIS Form I-539. ESTA travelers must leave within 90 days. Apply for a B-2 visa from abroad if a longer stay is needed.

Ready to plan your trip to Windsor?

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