{𝐔𝐧𝐢𝐭𝐞𝐝 𝐆𝐮𝐢𝐝𝐞}what is the cheapest day to book a flight on United airlines?

{𝐔𝐧𝐢𝐭𝐞𝐝 𝐆𝐮𝐢𝐝𝐞}what is the cheapest day to book a flight on United airlines? {𝐔𝐧𝐢𝐭𝐞𝐝 𝐆𝐮𝐢𝐝𝐞}what is the cheapest day to book a flight on United airlines? {𝐔𝐧𝐢𝐭𝐞𝐝 𝐆𝐮𝐢𝐝𝐞}what is the cheapest day to book a flight on United airlines?   Website URL: https://support.google.com/edu/classroom/thread/333627204?authuser=2&hl=en&sjid=5624141131321175365-NC