On 11 May, she boarded a large British merchant steamer, which also carried the name Mayflower, and sent the blockade runner to the United States under a prize crew.

The ship continued to play a prominent role in support of the negotiations which won Roosevelt the Nobel Peace Prize.

Many members of the world's royal families visited the yacht and numerous persons of great prominence signed her guestbook.

[3] One of Herbert Hoover's early acts as president was to dispense with Mayflower as an economy measure, saving upkeep costs of $300,000 per year, equivalent to $5,323,256 in 2023.

She was decommissioned at the Philadelphia Navy Yard, on 22 March 1929, and her Filipino stewards and much of her furniture were transferred to the presidential retreat at Rapidan Camp.

The following year while he was having the ship restored to her original luxurious splendor, by Henry J. Gielow Inc., of New York City, Parish's fortunes turned forcing him to sell the yacht shortly before he fled from the country to escape from prosecution and elude irate investors.

During the Depression years, a number of successive owners tried to promote a wide variety of projects for the ship, including use in the South America coastal trade, restoration as a historic relic, use as a floating dance salon, and even sale to the Japanese Government to be scrapped as Japan sought still to strengthen her war machine.

However, a complex web of legal difficulties, a shortage of money, and marginal business conditions frustrated these enterprises while the ship idled in Atlantic ports from New York to Jacksonville, Florida, awaiting an opportunity for future service.

[3] Decommissioned on 1 July 1946, Mayflower was sold at Baltimore, to Frank M. Shaw, on 8 January 1947, for use in the Arctic as a sealer.

However, while sailing for sealing waters between Greenland and Labrador, early in March, Mayflower was damaged by fire off Point Lookout, and forced to return to Baltimore.