US buyers importing from Thailand ask the same question on every purchase order: fly it or float it? The honest answer depends on three numbers — chargeable weight, landed value per kg, and how much a stockout costs you per week.
Transit time reality (2026)
| Mode | Route | Port-to-port | Door-to-door |
|---|---|---|---|
| Air freight | BKK → LAX/ORD/JFK | 1–3 days | 5–9 days |
| Air express (DHL/FedEx) | BKK → any US city | 3–5 days | 3–6 days |
| Ocean FCL | Laem Chabang → LA/Long Beach | 18–24 days | 26–34 days |
| Ocean FCL | Laem Chabang → Savannah/NY (via Suez or Panama) | 30–40 days | 38–50 days |
| Ocean LCL | Laem Chabang → US West Coast | 24–32 days | 35–45 days |
Add 5–10 days in front of any mode for Thai factory buffer, pre-shipment inspection, and documentation. Air does not fix a late factory — it only compresses the ocean leg.
Cost per kg, plainly
- Air freight (general cargo, BKK → USWC): roughly USD 4.20–6.50/kg at 500 kg+, higher below 300 kg, plus fuel and security surcharges, terminal fees, and US customs clearance.
- Air express door-to-door: USD 7–12/kg for small shipments, all-in.
- Ocean FCL 40'HQ: USD 2,800–4,600 all-in to USWC depending on season. At a 12-ton load that is USD 0.25–0.40/kg.
- Ocean LCL: USD 55–95 per CBM plus origin/destination charges; small volumes can land near air cost once destination fees are counted.
Air uses chargeable weight = greater of gross weight or volume ÷ 6,000 (cm³ per kg). Bulky-but-light Thai goods — rattan decor, pet beds, foam packaging — get punished badly on air.
The break-even test
Divide your product value by weight. If value per kg is above ~USD 80–100, air is often defensible: freight is a small share of landed cost and you free up working capital by turning inventory faster. Electronics, cosmetics, medical devices, jewellery, and vanilla-grade ingredients pass this test. If value per kg is below USD 20, ocean nearly always wins.
Then run the stockout math. If being out of stock costs you USD 6,000 per week in lost Amazon sales and air saves three weeks, you have USD 18,000 of headroom — that pays for a lot of kilograms.
Split shipments: the underused option
The smartest 2026 pattern for US importers is a hybrid PO:
- Air the first 10–20% of the order as soon as it comes off the line — this replenishes stock, seeds Amazon FBA, and lets you sell while the balance sails.
- Ship the remaining 80% by FCL to protect margin.
- Keep both shipments on the same commercial invoice numbering and HS code so customs treats them consistently.
This also de-risks quality. If the air tranche reveals a defect, you can correct the ocean tranche before it lands.
Hidden costs buyers forget
- Air: airport terminal handling, AMS/e-manifest fees, dangerous goods surcharges (lithium batteries, aerosols, alcohol-based cosmetics), and higher per-shipment customs entry cost relative to shipment size.
- Ocean: chassis and drayage at the US port, per diem/detention after free time, pier pass, and demurrage if your broker is slow. See our LCL vs FCL comparison.
- Both: customs bond, broker entry fee, and ISF filing on ocean only — details in our ISF 10+2 guide.
Insurance and Incoterms
Air cargo liability under the Montreal Convention is capped at roughly 22 SDR/kg, and ocean carrier liability is capped far below your goods' value. Buy all-risk marine cargo insurance at 110% of CIF for both modes. Choose FOB Laem Chabang or FOB BKK airport so you control the carrier and the data flow rather than inheriting your supplier's freight markup. Our Incoterms 2020 guide explains where risk actually transfers.
Peak season planning for 2026
Thai factories slow around Songkran (mid-April) and Chinese New Year affects upstream components. Ocean space tightens from August through October as US retailers pull holiday stock, and air rates spike late Q4. Book FCL space 3–4 weeks ahead in peak; air 7–10 days ahead.
How TUSKO handles it
We quote both modes on every RFQ with chargeable weight calculated from real carton dimensions — not estimates — so you compare apples to apples. Your single point of contact manages the Thai factory, inspection, and export documentation, and coordinates directly with your US broker so nothing stalls at clearance. Freight and handling are built into the landed cost you approve before production starts.
FAQ
Is air freight from Thailand to the USA worth it for small orders?
Usually yes below 200 kg, because LCL destination charges and delays erode the ocean saving. Compare door-to-door totals, not port-to-port rates.
How is air freight cost calculated from Bangkok?
On chargeable weight: the greater of actual gross weight or volumetric weight (length × width × height in cm ÷ 6,000). Bulky light goods cost far more than their scale weight suggests.
Can I mix air and sea for one purchase order?
Yes, and it is often the best answer. Air a first tranche to restock, sail the balance FCL, and keep HS codes and invoice values consistent across both entries.
Which US airports are best for Thai imports?
LAX and ORD have the deepest BKK capacity; JFK works for East Coast distribution. Choose the airport nearest your 3PL to avoid expensive domestic trucking.
Does ISF apply to air shipments from Thailand?
No. ISF 10+2 is ocean-only. Air cargo is covered by advance screening rules handled by the airline and your broker's entry filing.
How far ahead should I book in peak season?
Three to four weeks for ocean FCL from August to October, and seven to ten days for air in late Q4.