We've gone through lots of different flights, to help you find the cheapest way to get from Belfast Aldergrove International Airport to St Louis. You can choose from zero airlines.
But that doesn’t necessarily mean they’ll be the best option for your travel dates. To see as many flights as possible, try widening your search to include other departure airports.
Take a look at flight times to see which one works best for you.
If you need somewhere to stay for your trip to the USA, take a look at our accommodation options.
