Departing on a Wednesday is a good option for securing a great price. You can expect to save up to 66% when planning your travel around this day of the week.
When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 33 days in advance, which can save you up to 40% on flights from St Louis to National/Zaventem compared to booking the week you need them. Waiting 33 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $686. For sooner than that we have options available in the next 3 days from $901.
When flying from St Louis to National/Zaventem, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 38% versus a flight in the afternoon.
The chart below displays the airlines Cheapflights users traveling from St Louis to National/Zaventem choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
||$754||$910||No cancel fee||70%|
||$725||$1,074||No cancel fee||67%|
||$484||$1,109||No cancel fee||N/A|
||$769||$1,471||No cancel fee||69%|