{"id":93539,"date":"2026-06-15T04:56:34","date_gmt":"2026-06-15T09:56:34","guid":{"rendered":"https:\/\/www.shipstation.com\/?page_id=93539"},"modified":"2026-07-13T08:11:56","modified_gmt":"2026-07-13T13:11:56","slug":"flat-rate-shipping-boxes","status":"publish","type":"page","link":"https:\/\/www.shipstation.com\/en-ca\/fulfillment\/shipping\/flat-rate-shipping-boxes\/","title":{"rendered":"Flat rate shipping boxes for fast delivery"},"content":{"rendered":"\n
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Flat Rate shipping\/boxes that stay predictable at every order volume<\/h1>\n

When you’re choosing shipping and boxes, you want a clear winner fast. In ShipStation, you can manage orders from all your sales channels in one end-to-end platform, compare USPS Flat Rate\u00ae packaging against 200+ carrier rates, and print labels in batches\u2014all from one screen. Bring your own carrier accounts or use our discounted options, track every package, and keep your workflow moving with you.<\/p><\/div>\n

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Predictable cost, faster choices, and fewer manual steps for your business<\/h2>\n \n

Flat pricing feels simple. Real shipping decisions aren’t. We help you weigh Flat Rate boxes against weight-based rates, carrier options, and delivery speed, then move straight from order import to label and tracking.<\/p><\/div>\n \n \n <\/div>\n \n \n

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Know your cost before you pack based on weight and box choice<\/h3>\n \n

Flat Rate shipping can be the clean answer when weight climbs or destinations are farther away. You choose the Flat Rate box or envelope, and the cost stays tied to that package type. That makes quoting easier, even when orders vary day to day. You can still enter package details to avoid surprises and keep rate results accurate.<\/p><\/div>\n \n <\/div>\n\n <\/div>\n <\/div>\n

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Get commercial pricing without doing extra math<\/h3>\n \n

Retail counter pricing at the post office can differ from commercial pricing. Our platform shows available rates inside your workflow, so you can compare what you’ll actually pay before you print. Connect your existing carrier accounts to keep your negotiated rates, then rate-shop next to other options. Many teams also use discounted USPS rates, with no separate Stamps.com\u00ae account required.<\/p><\/div>\n \n <\/div>\n\n <\/div>\n <\/div>\n

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Pick the best shipping services automatically, not manually<\/h3>\n \n

Flat Rate boxes are one option. They’re not always the best. With automation rules, you can guide ShipStation to choose Flat Rate shipping when it fits your items, and switch to other services when it doesn’t. That means less tab-switching, fewer overrides, and faster label creation when order volume spikes.<\/p><\/div>\n \n <\/div>\n\n <\/div>\n <\/div>\n <\/div>\n \n <\/div>\n <\/div>\n<\/section>\n\n\n\n

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Rated #1 by Industry Leaders<\/h2>\n \n
We\u2019ve helped 130,000+ businesses manage their shipping smarter. Let us save your team time and money, too.<\/div>\n \n \n <\/div>\n \n \n \n \n
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\n Google<\/span>\n \n \n <\/svg>\n <\/svg>\n <\/svg>\n <\/svg>\n <\/svg>\n <\/span>\n\n 4.9 rating<\/span>\n 67 reviews<\/span>\n <\/div>\n
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Flat Rate shipping options you can set once and run every day<\/h2>\n \n
Use USPS flat rate packaging when it makes sense, then compare it against other rates and services in the same workflow. Turn rules into repeatable decisions, print in batches, and keep tracking tied to every order.<\/div>\n \n \n <\/div>\n
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USPS Flat Rate packaging quick reference: Flat Rate box, Flat Rate envelope<\/h3>\n \n
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Flat Rate packaging only shows when you select USPS Priority Mail as your service, so your team doesn’t waste time hunting for the right menu. Once enabled, your package drop-down can include common flat rate boxes and envelopes, like:<\/p>