Cheapest one-way flights from St. Louis to Brussels in September from 272€

AirHint found the following cheapest one-way flights from St. Louis (STL) to Brussels (BRU) in September 2025 (see full year).

One-Way flights

22 Sep Frontier Airlines
21 Sep Frontier Airlines
19 Sep Frontier Airlines
17 Sep Frontier Airlines

Also check the deals for return flights from St. Louis to Brussels in September.

Skyscanner

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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