A travel Web site used e-mail to cancel reservations, including those of blind customers — apparently forgetting they couldn’t read the messages or might not even have e-mail, The Post has learned.

Travelocity had offered a special promotion to 2,300 visually impaired people attending a National Federation of the Blind conference in Dallas over the Fourth of July holiday week: $200 off any three-day hotel and travel package.

But the Web site tweeted the offer to some 67,000 of its Twitter followers without mentioning the federation-membership requirement.

When it realized its mistake, it canceled the reservations of everyone who had jumped at the offer.

A large number of those were sighted people who had seen the Twitter offer.

“I feel they should at least honor the price!” said one of them — NYU student Ryan Gaines, 21, whose ticket for a flight back to college from Arizona was canceled.

He complained he still hasn’t gotten a refund.

A Travelocity spokesman said the company is trying to determine which of its canceled customers were at the conference, and said their discounts would be honored.