In international football, Chelsea is contesting both the UEFA Conference League and the expanded FIFA Club World Cup, with this season being their first participation in the former.

[2] It marked the debut appearances of new signings Kiernan Dewsbury-Hall, Marc Guiu, Pedro Neto, and Renato Veiga.

[4][5] However, despite being booed throughout the match by Wolves fans, he scored a 15-minute hat-trick in the second half, with all 3 goals being assisted by Cole Palmer.

[7] On 17 December 2024, it was reported that Mykhailo Mudryk has been given a provisional suspension by the Football Association for failing a drugs test with a prohibited substance known as meldonium.

[11][12] Win Draw Loss Fixtures Chelsea quickly found form in the Conference League, defeating Swiss club Servette 2–0 in the first leg of the 2024–25 UEFA Conference League play-off round, Chelsea's first-ever appearance in the competition.

[15] Chelsea kicked off their league phase campaign in style, with Renato Veiga and Kiernan Dewsbury-Hall both netting their first goals as Blues against Belgian club Gent.

Goals from Gent's Tsuyoshi Watanabe and Omri Gandelman threatened a comeback, but Pedro Neto and Christopher Nkunku added to the scoring, defeating the Belgian side 4–2 at home.

On 8 March, Chelsea announced a planned return to the United States during pre-season with matches later confirmed against Wrexham, Club América, Celtic, Manchester City and Real Madrid.

[164] Win Draw Loss Fixtures Chelsea entered the competition at the third round stage, and were drawn at home to Morecambe.

[175][176] Win Draw Loss Fixtures Chelsea entered the competition in the third round, and were drawn at home against Barrow.

[178] Win Draw Loss Fixtures Chelsea entered the UEFA Conference League in the play-off qualification round, and were drawn against Swiss club Servette.