AirHint found the following cheapest return flights from Southampton (SOU) to Glasgow (GLA) in September 2025 (see full year).

Return flights

23 Sep - 01 Oct	easyJet	direct
17 Sep - 24 Sep	easyJet	direct
23 Sep - 27 Sep	easyJet	direct
24 Sep - 29 Sep	easyJet
17 Sep - 23 Sep	easyJet	direct
24 Sep - 28 Sep	easyJet
26 Sep - 29 Sep	easyJet
10 Sep - 17 Sep	easyJet	direct
24 Sep - 25 Sep	easyJet
25 Sep - 30 Sep	easyJet
23 Sep - 30 Oct	easyJet	direct
22 Sep - 24 Sep	easyJet
27 Sep - 02 Oct	easyJet	direct
27 Sep - 04 Oct	easyJet	direct
29 Sep - 02 Oct	easyJet
22 Sep - 06 Oct	easyJet
29 Sep - 02 Oct	easyJet	direct
29 Sep - 03 Oct	easyJet

Also check the deals for one-way flights from Southampton to Glasgow 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 Southampton to Glasgow in September from $101

Return flights