Question: what is the best day to buy plane tickets online?
Answer: Shop on Tuesday. Best day to shop: The best time to book a U.S. flight is usually Tuesday at about 3 p.m. eastern time. ...  Don't Shop too Early or too Late. Careful! ...  Always Compare Airfare. The golden rule of shopping: Always compare airfares. ...  Cheapest Days to Fly. ...  Fly the Cheapest Route. ...  Book Group Travel One Ticket at a Time.