How to Send a Parcel to California from the UK

The Short Answer

Sending a parcel from the UK to California is typically 5 to 8 business days on UPS Worldwide Economy DDP through a platform like TradeWind, from £12.80 for the label on a 1kg parcel with US duty added on top per HS code. California is 1 to 2 days slower than the East Coast — geography matters even on transcontinental shipping.

California also has stricter product rules than any other US state — Proposition 65 chemical warnings, its own CDFA agricultural inspection, and a $500,000 sales-tax nexus threshold — so it pays to know what does and does not need extra care.

California vs East Coast Transit Times

The US is wide. Transit times from the UK reflect that:

• East Coast (NYC, NJ, Boston): 3 to 6 days on UPS WWE
• Texas, Atlanta, Chicago: 4 to 7 days on UPS WWE
• California, Pacific Northwest, Arizona: 5 to 8 days on UPS WWE

Express services compress this somewhat — UPS Express Saver and DHL Express deliver to California in 2 to 3 days versus 1 to 2 to the East Coast.

California Pricing on Common Services (2026)

Representative 2026 prices for a 1kg parcel from the UK to a Los Angeles or San Francisco residential address:

Same prices apply as for East Coast — carriers do not charge more for California, just take longer. For a full weight-by-weight breakdown see the UK to USA shipping rates page, and for realistic door-to-door timings our guide on how long UK to USA shipping takes.

California-Specific Customs Considerations

Proposition 65 — chemical warnings

This is the California rule that surprises UK sellers, because it has nothing to do with customs and everything to do with getting sued. The Safe Drinking Water and Toxic Enforcement Act (Prop 65) requires a clear warning on any product sold into California that exposes the user to one of roughly 900 listed chemicals above the state’s “no significant risk” level. The warning is the famous “WARNING: This product can expose you to chemicals including [X], which is known to the State of California to cause cancer” label.

What makes it bite is the enforcement model. Prop 65 lets private “bounty-hunter” plaintiffs sue on the state’s behalf and keep a share of the penalties, which run up to $2,500 per violation per day. Settlements against small out-of-state sellers are uncommon but not unheard of, and the letters land at the retailer, not the carrier. UK sellers most exposed:

• Cosmetics and personal care — some preservatives, dyes, fragrance components
• Jewellery and fashion accessories — lead and cadmium in lower-priced pieces (a repeat target of enforcement letters)
• Children’s products — strict thresholds on phthalates, lead and BPA
• Ceramics and glassware — lead in glazes and decoration
• Some food and dietary supplements — heavy metals such as lead and cadmium

The practical move for a small UK seller is not to panic but to add the compliant warning to product pages and packaging for the affected categories — the label itself is your defence. If you’re scaling DTC volume or selling wholesale into Californian retailers, get a Prop 65 review before it becomes a legal letter.

Agricultural inspection (CDFA)

California runs its own agricultural border programme on top of the federal USDA checks — it’s the only US state that inspects incoming parcels at this level, a legacy of protecting the state’s enormous farming economy from pests like the Mediterranean fruit fly. Shipments containing plants, seeds, cut flowers, certain raw or fresh foods, untreated wood, soil and some bee products can be pulled for a CDFA inspection after they clear federal customs, which adds a day or two and, for anything non-compliant, a rejection.

For most UK sellers this never comes up. But if you ship anything botanical — seeds, dried botanicals, plant-based craft materials, wooden items with bark — declare it precisely and expect the extra layer.

State sales tax

California uses economic nexus: an out-of-state seller (a UK business included) only has to register for and collect California sales tax once its sales into California exceed $500,000 in the current or prior calendar year. There is no transaction-count trigger — it’s the dollar figure alone. Below it, you have no obligation to register. This is entirely separate from federal customs duty, and it is the seller’s responsibility, never something the carrier settles.

For the overwhelming majority of UK sellers this is theoretical — you would need serious Californian volume to reach half a million dollars. If you get there, take proper US sales-tax advice, because once you cross the threshold in California you’ll likely be crossing economic-nexus lines in other states too.

LAX and SFO Customs Clearance

UK to California parcels typically clear customs at:

• LAX (Los Angeles International Airport) — main entry point for express and direct services
• SFO (San Francisco International) — secondary entry for Bay Area express
• Louisville (SDF) — UPS Worldwide Economy WorldHub for clearance, then domestic routing to CA

Clearance at LAX is generally efficient but slightly slower than JFK due to volume and geography. Holds are typically caused by:

• Prop 65 product flag (rare but happens)
• Restricted item triggers (leather, certain cosmetics, exotic ingredients)
• Agricultural items missing CDFA-compatible paperwork
• Wrong HS codes or vague descriptions

TradeWind keeps your customs data consistent across shipments so the same product clears the same way every time.

California Geography — What to Plan For

California is huge. Some delivery context:

• Los Angeles metro — major UPS, FedEx, DHL hubs; smooth delivery
• San Francisco Bay Area — fast delivery; some hills and walk-ups
• San Diego — straightforward; close to LAX hub
• Sacramento and Central Valley — slightly longer transit
• Far Northern California (rural, Humboldt, Trinity) — add 1 to 2 days
• Eastern Sierra and remote — small Delivery Area Surcharges may apply

For B2B shipments to California offices and warehouses, see the B2B USA shipping guide — many commercial buildings have receiving dock hours that limit afternoon deliveries.

CA Delivery Quirks

Gated communities and complexes. Gated suburbs are far more common in California than in most of the US, and a courier with no gate code and no phone number will simply mark the parcel “unable to deliver”. Capturing the recipient’s mobile number at checkout is the single fix — it lets the driver call or the carrier text an access code. The same goes for the large apartment blocks in LA and the Bay Area: push customers to add unit numbers and sign up for UPS My Choice.

Wildfire season (roughly August to October). California is the one destination where seasonal fire closures genuinely affect delivery. Carriers embargo or delay specific evacuated ZIP codes and flag them in tracking; expect 1 to 3 day delays into affected areas and check the carrier’s service-alert page before promising a date.

Practical Steps for California Shipping

1. Default to UPS Worldwide Economy DDP — best value, full DDP customs handling
2. Plan for 5 to 8 days rather than expecting East Coast speeds
3. Check Prop 65 if you sell cosmetics, jewellery, or children’s products at scale
4. Capture complete addresses — unit numbers, gate codes, phone numbers
5. Watch wildfire periods (Aug to Oct) for service alerts
6. Use Royal Mail PDDP for PO Boxes (UPS cannot deliver to PO boxes)

The Bottom Line

California is a major US market for UK sellers — second only to NY/NJ for most ecommerce brands. The main differences vs East Coast:

• 1 to 2 days slower transit
• LAX clearance instead of JFK
• Prop 65 awareness for certain product categories
• Wildfire-season service disruptions in autumn

UPS Worldwide Economy DDP at £12.80 for 1kg remains the best value default. For high-volume scaling into California, factor Prop 65 and potential CA sales tax registration into your roadmap.

Sources

• California OEHHA — Prop 65
• US Customs & Border Protection