Cheap flights from St. Louis to Barcelona from $443
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Barcelona departing on 10/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from St. Louis to Barcelona
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Air Canada flights from St. Louis to Barcelona-El Prat Airport
Our best Air Canada deals on St. Louis to Barcelona-El Prat Airport flight tickets
British Airways flights from St. Louis to Barcelona-El Prat Airport
Our best British Airways deals on St. Louis to Barcelona-El Prat Airport flight tickets
See travel insights to Barcelona from
How to get the cheapest flight ticket from St. Louis to Barcelona-El Prat Airport
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 Barcelona-El Prat Airport?
The cheapest month to fly to Barcelona-El Prat Airport from St. Louis is in February. Flight prices, which tend to average around $684, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Barcelona-El Prat Airport from St. Louis during January instead. Flights to Barcelona-El Prat Airport in January, while not as cheap as those in February, still average around $773.
What is the cheapest day to depart on your flight to Barcelona-El Prat Airport?
The cheapest day to depart on your flight to Barcelona-El Prat Airport is on a Tuesday when prices can be found for as low as $867. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around $1,135. These prices are subject to change though, so be sure to set up a Price Alert for flights to Barcelona-El Prat Airport.
What is the cheapest time of day to depart on your flight to Barcelona-El Prat Airport?
Flying to Barcelona-El Prat Airport from St. Louis in the morning is the least expensive time of day to depart. momondo users have found prices as low as $905 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,043 on average. Flights to Barcelona-El Prat Airport from St. Louis in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.
How far in advance should I book a flight to Barcelona-El Prat Airport?
You are more likely to see cheaper flights to Barcelona-El Prat Airport from St. Louis when booking 19 weeks ahead of your departure date. In general, you can expect to find flights to Barcelona-El Prat Airport for around $978 when searching 19 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Barcelona-El Prat Airport from St. Louis for as low as $829 on momondo.
What is the cheapest airline that flies from Lambert-St Louis to Barcelona-El Prat?
Aer Lingus, Iberia, and Air Canada are the most popular carriers operating from Lambert-St Louis to Barcelona-El Prat
What airlines fly to Barcelona-El Prat Airport?
Air Canada, United Airlines and American Airlines are the top three most popular airlines that fly to Barcelona-El Prat Airport from St. Louis according to our data. Air Canada is the first choice among our users, with 28% of people opting to fly with this airline when traveling to Barcelona-El Prat Airport. Keep in mind that there are 8 different airlines that fly to Barcelona-El Prat Airport on a routine basis, so you have a few additional options to choose from.
When to book flights from St. Louis to Barcelona-El Prat Airport
Cheap St. Louis to Barcelona-El Prat Airport (STL to BCN) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Barcelona-El Prat Airport
How far is Lambert-St Louis to Barcelona-El Prat by plane?
There are 4635.1 mi between Lambert-St Louis and Barcelona-El Prat. Flights usually cover this in 11h 15m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Lambert-St Louis Airport to Barcelona-El Prat Airport?
Prices for flights from Lambert-St Louis Airport to Barcelona-El Prat Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Barcelona-El Prat Airport?
As of April 2025, there are 8 operators available to choose from for flights from Lambert-St Louis Airport to Barcelona-El Prat Airport.
How old do you have to be to fly from Lambert-St Louis Airport to Barcelona-El Prat Airport?
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 Barcelona-El Prat Airport.
What documentation or ID do you need to fly to Barcelona-El Prat Airport?
The travel and health documents required for your trip to Barcelona-El Prat Airport 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 Barcelona-El Prat Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from St. Louis to Barcelona-El Prat Airport?
momondo data reveals that the most frequently booked airline on the route from St. Louis to Barcelona-El Prat Airport is Air Canada, representing 21% of all bookings. The subsequent popular airlines are United Airlines at 20%, American Airlines at 18%, and British Airways at 17%.
Best airlines flying from St. Louis to Barcelona-El Prat Airport
Compare and see reviews for airlines that fly from St. Louis to Barcelona-El Prat Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $527 | Free Cancellation | Rating 6.7 7,044 reviews | |||
| PriceFrom $540 | Free Cancellation | Rating 7.8 1,333 reviews | |||
| PriceFrom $602 | Free Cancellation | Rating 6.6 6,835 reviews | |||
| PriceFrom $602 | Free Cancellation | Rating 8.0 7,929 reviews | |||
| PriceFrom $632 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $689 | Free Cancellation | Rating 7.0 2,698 reviews | |||
| PriceFrom $697 | Free Cancellation | Rating 7.4 8,696 reviews | |||
| PriceFrom $705 | Free Cancellation | Rating 7.0 9,240 reviews |
Traveling to a place near Barcelona?
Book flights to Barcelona if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from St. Louis to Barcelona?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Barcelona. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from St. Louis to Barcelona with flexible booking policies on momondo?
Flights from St. Louis to Barcelona 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 Barcelona?
Once all potential St. Louis to Barcelona 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 Barcelona right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of St. Louis to Barcelona flights. All you need is a valid email address and we will do the rest; it is that quick and easy.