Shopify Carrier Integration — FedEx, UPS & Royal Mail Delivery Dates
Your Delivery Dates Are Based on Transit Times You Entered Manually. When Did You Last Check Them?
Flare connects directly to your FedEx or UPS account to pull live transit time data by ZIP code — so delivery dates at checkout reflect what your carrier can actually do today, not what you configured twelve months ago.
Why manually maintained transit times are always wrong for someone
You configured transit times for your FedEx zones twelve months ago. FedEx updated their ground service times for the Mountain West last quarter. Without Flare, your checkout still shows transit times from twelve months ago — customers in Montana are seeing 3-day delivery when the carrier is now doing 5. With Flare, the delivery dates update automatically when FedEx updates their service levels. No one needs to notice. No one needs to update anything.
Transit times are not static. Carriers update service levels by region, adjust for seasonal demand, change network routing and add or remove service options. A transit time you configured accurately a year ago may be wrong today — and you likely won’t know until a customer emails to say their order arrived two days later than the checkout promised.
Manual transit time management scales badly. For a business shipping to 50 states across multiple carriers, maintaining accurate transit times by ZIP code is a significant ongoing task. Something gets missed. A region updates. A new carrier contract changes service levels. The person who maintains the rules is on holiday. Every gap between your configured transit times and the carrier’s actual service is a delivery date your checkout is getting wrong.
Live carrier integration removes the maintenance burden entirely. The transit time for every ZIP code your carrier serves is pulled from the source — the carrier’s own data — and applied at checkout in real time. When the carrier updates their service levels, your delivery dates update automatically. No one needs to notice. No one needs to act.
Live carrier data at checkout — updated automatically.
Connect your FedEx or UPS account directly
Link your existing FedEx or UPS shipping account to Flare through your carrier credentials. No third-party middleware, no additional accounts. Once connected, Flare queries your carrier’s API in real time to retrieve transit time data for the customer’s ZIP code at checkout — using your account’s contracted service levels, not generic published estimates.
Live transit times by ZIP code at every checkout
When a customer enters their ZIP code at checkout, Flare queries the carrier API for the transit time to that specific location from your origin warehouse. Combined with your cut-off rules, shipping day schedule and any blocked dates, Flare calculates the earliest accurate delivery date and presents it at checkout. The calculation reflects what the carrier can actually deliver to that ZIP code today — not a generalised zone estimate.
Delivery dates update automatically when carrier service changes
When FedEx or UPS updates transit times for a region — seasonal adjustments, network changes, new service levels — your delivery dates update automatically. No manual review required. No rule changes needed. The live API connection means your checkout always reflects current carrier service, not a snapshot from whenever you last configured your rules.
Three transit time problems that stop being your responsibility.
Delivery dates reflect what your carrier can actually do today
Live transit time data from your carrier account means the date shown at checkout is calculated from current service levels — not last year’s configuration. A ZIP code where transit has improved shows a faster date. A ZIP code where service has extended shows the accurate longer window. Every customer sees what’s actually possible for their location.
Regional service changes update automatically — no manual review
When your carrier adjusts service levels for a region, your delivery dates update without anyone on your team needing to notice or act. The maintenance task of keeping transit times current disappears — replaced by a live API connection that’s always as current as your carrier’s own data.
Your contracted rates apply — not generic published estimates
The live connection uses your carrier account credentials, which means transit times are calculated based on your contracted service levels. For merchants with premium carrier agreements, this means delivery dates that reflect the actual service your contract guarantees — not the slower estimates published for general customers.
“Flare has been nothing short of transformative. One of the standout features is its ability to set location-specific shipping rules tailored to our needs — live products often require specific handling, delivery windows, and adherence to regional regulations. With Flare, we can create custom schedules that ensure our deliveries are planned with these factors in mind. The app has dramatically reduced the logistical challenges we used to face.”
Carrier integration — answered.
Yes. Connect your existing FedEx or UPS account through your carrier credentials — no new accounts, no third-party middleware. Flare queries your carrier’s API directly using your account, which means transit times reflect your contracted service levels and the specific services available on your account.
Flare falls back to your configured manual transit times if the carrier API is temporarily unavailable. The delivery date shown uses the last known transit data for that ZIP code rather than failing or showing no date. API availability is monitored and the live connection resumes automatically when the carrier service recovers.
Yes — all rules layer automatically. Live carrier transit times combine with your cut-off rules, shipping day schedules, blocked dates and product lead times. A ZIP code with a 3-day carrier transit time, ordered after your 2pm cut-off, with a bank holiday in the window, shows the correct combined delivery date — calculated from all applicable rules simultaneously.
Direct API integration is currently available for FedEx and UPS. For other carriers — DHL, DPD, Royal Mail and others — manual transit time configuration by zone is available and fully supported. For UK merchants, postcode zone rules with manual transit times cover all major UK carriers accurately.
Show Delivery Dates Based on What Your Carrier Can Actually Do — Updated Automatically.
Connect your FedEx or UPS account once. Flare pulls live transit times by ZIP code and updates delivery dates at checkout automatically when carrier service levels change.
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Most brands are live within a day. No developer required.