About the St. Louis–San Diego lane
What this lane costs
| — Weight | — USPS retail | — L5 estimated | — You save |
|---|---|---|---|
| 1 lb | $10.60 | $6.36 | $4.24 (40%) |
| 5 lb | $20.70 | $12.42 | $8.28 (40%) |
| 10 lb | $34.90 | $20.94 | $13.96 (40%) |
| 25 lb | $61.35 | $36.81 | $24.54 (40%) |
| 50 lb | $99.90 | $59.94 | $39.96 (40%) |
Retail rates are USPS Ground Advantage at Zone 7. L5 estimate assumes a 40% commercial discount typical for shippers in our volume bands. Request a custom quote for binding rates.
Carrier comparison: USPS, UPS, FedEx
Each major US parcel carrier has its own strengths on the origin–destination corridor.
USPS: USPS's flat-rate boxes can be the cheapest option for dense, heavier items in the 5–20 lb range when they fit.
UPS: UPS Ground tends to win in the 10–70 lb band, especially on commercial-to-commercial deliveries.
FedEx: FedEx Express options on this lane are worth considering only for time-critical shipments — premium rates kick in fast.
Transit time and timing considerations
What L5 customers ship on this lane
Optimizing your costs on this corridor
Three things to look at when you're trying to drive cost down on this corridor:
- High-zone parcels benefit most from regional injection: instead of dropping at the origin Post Office, parcels enter the USPS network closer to destination, effectively reducing zone.
- On coast-to-coast lanes, even small dimensional inefficiencies compound — a 2-inch larger box can shift you to a higher rate band.
About St. Louis as a shipping origin
About San Diego as a destination
Frequently asked questions
What's the cheapest way to ship from St. Louis to San Diego?
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For parcels under 5 pounds, USPS Ground Advantage is usually the lowest cost. Above 10 pounds, UPS Ground or FedEx Ground tend to win. The exact answer depends on dimensions, residential vs. commercial delivery, and volume — which is why multi-carrier rate-shopping (rather than picking one carrier upfront) typically saves 20–30%.
Which carrier is best for St. Louis-to-San Diego shipping?
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There's no single best — it depends on weight, dimensions, and timing. USPS handles light residential cheapest. UPS and FedEx handle heavier commercial best. For volume shippers, the right answer is to use a multi-carrier platform that rate-shops every shipment automatically.
What USPS zone is the St. Louis to San Diego route?
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This lane is USPS Zone 7 (1,401–1,800 mi). Zones are calculated from the first three digits of each ZIP and represent the distance band between Sectional Center Facilities. Lower zones mean lower rates and faster transit.
Is overnight shipping available from St. Louis to San Diego?
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Yes. UPS Next Day Air, FedEx Priority Overnight, and USPS Priority Mail Express all serve this lane. Pricing varies by weight and dimensions — typically $30–$120 for parcels under 10 pounds. For most shippers, overnight only makes sense for time-critical commitments.
Get a custom rate for this lane
If you ship from St. Louis to San Diego regularly, we can build a custom rate program around your actual volume and shipment profile. Speak with us and a named account rep will send a detailed comparison versus your current shipping setup within one business day.