Cheap flights from St. Louis to Barcelona from $309
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 10/27. 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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How to get the cheapest flight ticket from St. Louis to Barcelona
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 typical price of a round-trip flight between St. Louis and Barcelona?
What is the cheapest month to fly to Barcelona?
The month of February is, on average, the cheapest month to fly to Barcelona from St. Louis, with most prices found around $684. If you don’t want to visit Barcelona in February, then you should wait until November to fly from St. Louis, when ticket prices are also cheap, with an average price of $716.
What is the cheapest day to depart on your flight to Barcelona?
The cheapest day to depart from St. Louis to Barcelona is on a Tuesday when prices can be found for as low as $867. On the other hand, Thursday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,135.
What is the cheapest time of day to depart on your flight to Barcelona?
In the morning is the cheapest time of day to fly from St. Louis to Barcelona when you can find flight prices for as low as $905. Flying to Barcelona in the morning is an ideal time because this is during off-peak travel hours. 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 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?
You are more likely to see cheaper flights to Barcelona from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Barcelona for around $977 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Barcelona from St. Louis for as low as $730 on momondo.
What is the cheapest airline that flies from Lambert-St Louis to Barcelona?
Lufthansa, Air Canada, and KLM are the most popular carriers operating from Lambert-St Louis to Barcelona
What airlines fly to Barcelona?
United Airlines, Air Canada and American Airlines are the top three most popular airlines that fly to Barcelona from St. Louis according to our data. United Airlines is the first choice among our users, with 31% of people opting to fly with this airline when traveling to Barcelona. Keep in mind that there are 8 different airlines that fly to Barcelona on a routine basis, so you have a few additional options to choose from.
Cheap St. Louis to Barcelona flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Barcelona
How far is Lambert-St Louis to Barcelona by plane?
The straight-line distance from Lambert-St Louis to Barcelona is 4636.1 mi. In terms of flight time, this usually takes a little over 11h 20m.
When did momondo last update prices for flights from Lambert-St Louis Airport to Barcelona?
Prices for flights from Lambert-St Louis Airport to Barcelona were last updated today.
How many operators does momondo search for flights from Lambert-St Louis Airport to Barcelona?
As of June 2025, there are 8 operators available to choose from for flights from Lambert-St Louis Airport to Barcelona.
How old do you have to be to fly from Lambert-St Louis Airport to Barcelona?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Barcelona.
What documentation or ID do you need to fly to Barcelona?
The necessary travel and health documents for your Barcelona trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
Best airlines flying from St. Louis to Barcelona
Compare and see reviews for airlines that fly from St. Louis to Barcelona with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $468 | Free Cancellation | Rating 7.8 1,366 reviews | |||
| PriceFrom $527 | Free Cancellation | Rating 6.8 7,201 reviews | |||
| PriceFrom $533 | Free Cancellation | Rating 8.0 7,969 reviews | |||
| PriceFrom $602 | Free Cancellation | Rating 6.6 7,081 reviews | |||
| PriceFrom $623 | Free Cancellation | Rating 7.4 8,852 reviews | |||
| PriceFrom $629 | Free Cancellation | Rating 7.1 9,657 reviews | |||
| PriceFrom $631 | Free Cancellation | Rating 7.0 2,811 reviews | |||
| PriceFrom $648 | Free Cancellation | Rating 7.2 10,000 reviews |
Why 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?
Yes. momondo allows you to filter the results for St. Louis to Barcelona flights to just show those with flexible booking policies.
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?
If you are not ready to book a flight from St. Louis to Barcelona now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Barcelona and let you know when they change.