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Using First Class Mail International, deliveries generally take between 7â21 days to arrive, although the USPS does not guarantee delivery dates or times. Mail may travel to its destination by ground, air or a combination of both.
In most cases, the first-class mailing option takes from one to three days on average and three to five days for delivery to Alaska and Hawaii. To use the first-class mail option, prices are based on weight of up to 13 ounces maximum.n most cases, the first-class mailing option takes from one to three days on average and three to five days for delivery to Alaska and Hawaii. To use the first-class mail option, prices are based on weight of up to 13 ounces maximum.