First-class packages may take longer to mail through USPS

What is USPS First Class Mail? Shipping First Class Mail Explained

Is first-class USPS delivery slower? We tested it to find out.

USPS test: We mailed 4 packages with GPS trackers to see how quickly they got there

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13 Investigates: How long should it take for the postal service to deliver your packages?

USPS adding one to two days onto first class delivery estimates

USPS First Class Mail Is Changing To USPS Ground Advantage

Rep. Ayanna Pressley Rallies with Postal Workers, Demands First-Class USPS Service Year-Round

USPS increases delivery time on first class mail

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How long does USPS take for international shipping?

USPS First Class REPLACED By USPS Ground Advantage

USPS: Starting Oct. 1, some first-class packages and other mail may take longer to arrive- NBC WPMI

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USPS to slow down First-Class delivery to help speed up Priority Mail

USPS- First class vs. priority mail

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USPS slows first-class mail delivery starting in October

USPS sets new standards for first class mail traveling long distances