AirHint found the following cheapest return flights from Salt Lake City (SLC) to London (LHR) in September 2025 (see full year).

Return flights

22 Sep - 26 Sep	jetBlue
29 Sep - 04 Oct	jetBlue
27 Sep - 03 Oct	jetBlue
23 Sep - 18 Oct	jetBlue
25 Sep - 04 Oct	jetBlue
28 Sep - 05 Oct	jetBlue
26 Sep - 05 Oct	Frontier Airlines
23 Sep - 30 Sep	jetBlue
27 Sep - 01 Oct	Spirit Airlines
25 Sep - 29 Sep	Frontier Airlines
25 Sep - 28 Sep	jetBlue
19 Sep - 27 Sep	jetBlue
24 Sep - 30 Sep	Hawaiian Airlines
26 Sep - 30 Sep	Alaska Airlines
19 Sep - 23 Sep	jetBlue
22 Sep - 29 Sep	Frontier Airlines
24 Sep - 30 Sep	Delta	direct
29 Sep - 11 Oct	Delta	direct
27 Sep - 11 Oct	Delta

Also check the deals for one-way flights from Salt Lake City to London in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Salt Lake City to London in September from $772

Return flights