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

Return flights

09 Sep - 16 Sep	Spirit Airlines
13 Sep - 23 Sep	Spirit Airlines
03 Sep - 07 Sep	Frontier Airlines
06 Sep - 13 Sep	Spirit Airlines
05 Sep - 12 Sep	Spirit Airlines
07 Sep - 14 Sep	Frontier Airlines
15 Sep - 30 Sep	Frontier Airlines
01 Sep - 07 Sep	Frontier Airlines
01 Sep - 13 Sep	jetBlue
03 Sep - 13 Sep	Hawaiian Airlines
30 Sep - 28 Oct	Virgin Atlantic
30 Sep - 28 Oct	Air France	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 516€

Return flights