Cheap flights from St. Louis to Belgium from $689
This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Belgium departing on 5/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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United Airlines flights from St. Louis to Belgium
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How to get the cheapest flight ticket from St. Louis to Belgium
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Belgium?
In general, February is the cheapest month to fly from St. Louis to Belgium. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $690. If you are unable to visit Belgium during the month of February, then departing from St. Louis during the month March is also very affordable. Most momondo users find prices during this month for around $725.
What is the cheapest day to depart on your flight to Belgium?
Our data shows that Friday is the least expensive day to fly to Belgium. Tickets to fly out on this day can be as low as $1,035. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $1,431. These prices are subject to change though, so be sure to set up a Price Alert for flights to Belgium.
Cheap St. Louis to Belgium flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Belgium
When did momondo last update prices for flights from Lambert-St Louis Airport to Belgium?
Prices for flights from Lambert-St Louis Airport to Belgium are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Belgium?
As of April 2025, there is 1 operator available to choose from for flights from Lambert-St Louis Airport to Belgium.
How old do you have to be to fly from Lambert-St Louis Airport to Belgium?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Belgium.
What documentation or ID do you need to fly to Belgium?
The travel and health documents required for your trip to Belgium can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Belgium. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
Best airlines flying from St. Louis to Belgium
Compare and see reviews for airlines that fly from St. Louis to Belgium with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $578 | Free Cancellation | Rating 7.4 8,615 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to Belgium?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Belgium. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from St. Louis to Belgium with flexible booking policies on momondo?
Flights from St. Louis to Belgium with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from St. Louis to Belgium?
Once all potential St. Louis to Belgium flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from St. Louis to Belgium right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of St. Louis to Belgium flights. All you need is a valid email address and we will do the rest; it is that quick and easy.