How long is the flight from St. Louis to Barcelona-El Prat Airport?

For as low as $426, Virgin Atlantic can have you in Barcelona-El Prat Airport from St. Louis in 11h 45m. There are 4638 mi between St. Louis and Barcelona-El Prat Airport. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines to fly from St. Louis to Barcelona-El Prat Airport one-way?

One-way options have recently been found by users for as low as $381 on Scandinavian Airlines. Other airlines that offer cheap prices include Air Canada from $391 and Lufthansa from $392 one-way.

In terms of precipitation, rainfall in Barcelona-El Prat Airport ranges from 0.8 - 3.6 inches per month. October is typically the wettest month, when rainfall can reach 3.6 in. July is typically the driest time to visit Barcelona-El Prat Airport when rainfall is around 0.8 in.

If weather is an important factor for your trip to Barcelona-El Prat Airport, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

What are the most popular airlines that fly from St. Louis to Barcelona-El Prat Airport?

Before booking your flight from St. Louis to Barcelona-El Prat Airport check out the most popular airlines for this route: United Airlines, Air Canada or American Airlines.

Most accurate provider : When it comes to deals on St. Louis-Barcelona-El Prat Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Barcelona-El Prat Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Barcelona-El Prat Airport flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-Barcelona-El Prat Airport flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Barcelona-El Prat Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly from for flights from St. Louis to Barcelona-El Prat?

Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Barcelona-El Prat. You should not have trouble finding flights to Barcelona-El Prat from Lambert-St Louis; the airport handles an average of 0 outbound flights to Barcelona-El Prat per day. You should also have plenty of airline options to choose from since 8 airlines have flights from the St. Louis airport to Barcelona-El Prat. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

Can I find deals for flights from St. Louis to Barcelona-El Prat that include hotel bookings?

Yes. In addition to deals on St. Louis to Barcelona-El Prat flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Barcelona-El Prat?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Barcelona-El Prat.

Can I find deals for business class flights from St. Louis to Barcelona-El Prat?

Yes. Cheapflights offers flight deals from St. Louis to Barcelona-El Prat by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$272+ Flights from St. Louis to Barcelona-El Prat Airport

Q: How much does it cost to fly round-trip from St. Louis to Barcelona-El Prat Airport?

Airfare is below average for this route at the moment. St. Louis to Barcelona-El Prat Airport flights typically cost between $592 and $738 in November. The cheapest round-trip price found within the last 3 days was $405 on Virgin Atlantic (Nov 10-Nov 26).

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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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Cheapflights Tip: The best prices from Lambert-St Louis to Barcelona-El Prat are usually found in February or November, booked 85 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Find flight deals from St. Louis to Barcelona-El Prat

Cheapest flights from St. Louis to Barcelona-El Prat
Explore the most affordable flight options available from St. Louis to Barcelona-El Prat. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 28, 2025.

Mon 11/107:02 pmSTL - BCN

1 stop30h 38mVirgin Atlantic

Wed 11/2610:55 amBCN - STL

1 stop14h 40mVirgin Atlantic

Deal found 10/26

$405

Tue 12/29:30 amSTL - BCN

1 stop16h 10mDelta

Tue 12/910:15 amBCN - STL

2 stops29h 55mDelta

Deal found 10/27

$438

Wed 11/263:50 pmSTL - BCN

1 stop13h 10mLufthansa

Fri 12/56:50 amBCN - STL

1 stop14h 05mLufthansa

Deal found 10/26

$448

Mon 11/246:43 pmSTL - BCN

2 stops16h 02mLufthansa

Tue 12/25:10 pmBCN - STL

1 stop27h 45mLufthansa

Deal found 10/26

$453

Wed 11/266:30 amSTL - BCN

2 stops20h 05mAir Canada

Thu 12/41:35 pmBCN - STL

2 stops33h 05mAir Canada

Deal found 10/27

$461

Wed 11/194:30 pmSTL - BCN

2 stops17h 00mDelta

Thu 12/410:55 amBCN - STL

1 stop14h 01mDelta

Deal found 10/26

$465

Wed 12/104:32 pmSTL - BCN

2 stops16h 58mDelta

Wed 12/1710:15 amBCN - STL

2 stops17h 32mDelta

Deal found 10/26

$470

Mon 11/102:36 pmSTL - BCN

2 stops13h 34mMultiple Airlines

Wed 11/2611:10 amBCN - STL

2 stops16h 36mMultiple Airlines

Deal found 10/26

$473

Tue 12/210:49 amSTL - BCN

1 stop15h 11mIberia

Tue 12/912:30 pmBCN - STL

1 stop15h 08mIberia

Deal found 10/26

$479

Wed 11/1911:51 amSTL - BCN

2 stops16h 19mBritish Airways

Thu 12/412:30 pmBCN - STL

1 stop14h 51mBritish Airways

Deal found 10/28

$481

Best flights from St. Louis to Barcelona-El Prat
Discover carefully curated flight deals from St. Louis to Barcelona-El Prat that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 28, 2025.

Mon 11/101:55 pmSTL - BCN

1 stop11h 45mVirgin Atlantic

Wed 11/2610:15 amBCN - STL

2 stops39h 20mVirgin Atlantic

Deal found 10/26

$426

Tue 12/29:30 amSTL - BCN

1 stop16h 10mDelta

Tue 12/910:15 amBCN - STL

2 stops30h 35mDelta

Deal found 10/26

$438

Wed 11/263:50 pmSTL - BCN

1 stop13h 10mLufthansa

Fri 12/56:50 amBCN - STL

1 stop14h 05mLufthansa

Deal found 10/26

$448

Tue 1/62:54 pmSTL - BCN

2 stops15h 46mBritish Airways

Tue 1/1310:40 amBCN - STL

1 stop19h 19mBritish Airways

Deal found 10/27

$481

Mon 11/248:20 amSTL - BCN

2 stops18h 15mUnited Airlines

Tue 12/21:50 pmBCN - STL

2 stops32h 39mUnited Airlines

Deal found 10/26

$482

Mon 11/248:00 amSTL - BCN

2 stops18h 35mAir Canada

Tue 12/21:50 pmBCN - STL

2 stops32h 39mAir Canada

Deal found 10/25

$482

Wed 11/2611:07 amSTL - BCN

1 stop12h 58mMultiple Airlines

Thu 12/411:00 amBCN - STL

1 stop19h 59mMultiple Airlines

Deal found 10/26

$484

Wed 11/194:30 pmSTL - BCN

2 stops17h 00mDelta

Thu 12/410:55 amBCN - STL

1 stop14h 01mDelta

Deal found 10/26

$465

Tue 11/256:43 pmSTL - BCN

2 stops31h 52mUnited Airlines

Tue 12/21:50 pmBCN - STL

2 stops32h 39mUnited Airlines

Deal found 10/27

$482

Wed 12/104:32 pmSTL - BCN

2 stops16h 58mDelta

Wed 12/1710:15 amBCN - STL

2 stops17h 32mDelta

Deal found 10/26

$470

Last-minute flights from St. Louis to Barcelona-El Prat
Discover last-minute flight deals from St. Louis to Barcelona-El Prat. Data last updated October 28, 2025 and is based on user searches.

Mon 11/107:02 pmSTL - BCN

1 stop30h 38mVirgin Atlantic

Wed 11/2610:55 amBCN - STL

1 stop14h 40mVirgin Atlantic

Deal found 10/26

$405

Mon 11/102:36 pmSTL - BCN

2 stops13h 34mMultiple Airlines

Wed 11/2611:10 amBCN - STL

2 stops16h 36mMultiple Airlines

Deal found 10/26

$473

Wed 11/194:30 pmSTL - BCN

2 stops17h 00mDelta

Thu 12/410:55 amBCN - STL

1 stop14h 01mDelta

Deal found 10/26

$465

Wed 11/1911:51 amSTL - BCN

2 stops16h 19mBritish Airways

Thu 12/412:30 pmBCN - STL

1 stop14h 51mBritish Airways

Deal found 10/28

$481

Mon 11/246:43 pmSTL - BCN

2 stops16h 02mLufthansa

Tue 12/25:10 pmBCN - STL

1 stop27h 45mLufthansa

Deal found 10/26

$453

Mon 11/2410:00 amSTL - BCN

2 stops16h 35mUnited Airlines

Tue 12/26:50 amBCN - STL

2 stops39h 39mUnited Airlines

Deal found 10/27

$482

Wed 11/266:43 pmSTL - BCN

2 stops16h 02mLufthansa

Fri 12/55:50 amBCN - STL

1 stop15h 05mLufthansa

Deal found 10/26

$438

Wed 11/266:30 amSTL - BCN

2 stops20h 05mAir Canada

Thu 12/41:35 pmBCN - STL

2 stops33h 05mAir Canada

Deal found 10/27

$461

Wed 11/2611:07 amSTL - BCN

1 stop12h 58mMultiple Airlines

Thu 12/412:30 pmBCN - STL

1 stop14h 51mMultiple Airlines

Deal found 10/28

$484

One-way flights from St. Louis to Barcelona-El Prat
Search for one-way flight options from St. Louis to Barcelona-El Prat. Find affordable one-way fares based on user searches. Data last updated October 28, 2025.

Mon 3/234:05 pmSTL - BCN

3 stops21h 30mMultiple Airlines

Deal found 10/26

$272

Wed 12/107:43 pmSTL - BCN

3 stops41h 17mMultiple Airlines

Deal found 10/27

$321

Wed 12/103:50 pmSTL - BCN

1 stop13h 10mLufthansa

Deal found 10/25

$366

Mon 3/2311:51 amSTL - BCN

2 stops24h 29mScandinavian Airlines

Deal found 10/26

$375

Mon 2/2311:51 amSTL - BCN

2 stops23h 29mScandinavian Airlines

Deal found 10/25

$381

Wed 12/104:05 pmSTL - BCN

2 stops15h 00mAir Canada

Deal found 10/27

$391

Mon 11/2410:00 amSTL - BCN

2 stops16h 35mAir Canada

Deal found 10/25

$395

Tue 11/1112:31 pmSTL - BCN

1 stop17h 39mLufthansa

Deal found 10/27

$397

Tue 11/118:25 amSTL - BCN

1 stop16h 55mUnited Airlines

Deal found 10/26

$399

Sat 11/229:52 amSTL - BCN

3 stops51h 43mMultiple Airlines

Deal found 10/25

$414

Cheap flight deals from St. Louis to Barcelona-El Prat

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$405 (lastminute.com)
One-way from	$272 (Mytrip)
Popular in	June
Cheapest in	February
Average price	$745

Provider with most accurate pricing for Lambert-St Louis-Barcelona-El Prat flight deals.

Search Deals

Provider most trusted by Cheapflights users for Lambert-St Louis-Barcelona-El Prat flights.

Search Deals

From Lambert-St Louis to Barcelona-El Prat

Search Deals

One-way flight from Lambert-St Louis to Barcelona-El Prat

Search Deals

Highest demand for flights based on searches. 23% potential increase in price ($290 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 2025

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Barcelona-El Prat Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 11/10

1:55 pm-8:40 am

1 stop11h 45m

Barcelona-El Prat

Wed 11/26

10:15 am-6:35 pm

2 stops39h 20m

$426

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 12/2

9:30 am-8:40 am

1 stop16h 10m

Barcelona-El Prat

Tue 12/9

10:15 am-9:50 am

2 stops30h 35m

$438

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 11/26

3:50 pm-12:00 pm

1 stop13h 10m

Barcelona-El Prat

Fri 12/5

6:50 am-1:55 pm

1 stop14h 05m

$448

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 11/19

4:30 pm-4:30 pm

2 stops17h 00m

Barcelona-El Prat

Thu 12/4

10:55 am-5:56 pm

1 stop14h 01m

$465

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 12/10

4:32 pm-4:30 pm

2 stops16h 58m

Barcelona-El Prat

Wed 12/17

10:15 am-8:47 pm

2 stops17h 32m

$470

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 1/6

2:54 pm-1:40 pm

2 stops15h 46m

Barcelona-El Prat

Tue 1/13

10:40 am-10:59 pm

1 stop19h 19m

$481

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 11/24

8:20 am-9:35 am

2 stops18h 15m

Barcelona-El Prat

Tue 12/2

1:50 pm-3:29 pm

2 stops32h 39m

$482

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 11/24

8:00 am-9:35 am

2 stops18h 35m

Barcelona-El Prat

Tue 12/2

1:50 pm-3:29 pm

2 stops32h 39m

$482

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 11/25

6:43 pm-9:35 am

2 stops31h 52m

Barcelona-El Prat

Tue 12/2

1:50 pm-3:29 pm

2 stops32h 39m

$482

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 11/26

11:07 am-7:05 am

1 stop12h 58m

Barcelona-El Prat

Thu 12/4

11:00 am-11:59 pm

1 stop19h 59m

$484

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 21 results

Compare providers for flights from St. Louis to Barcelona-El Prat

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Barcelona-El Prat in October.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
AranGrant	Price Accuracy2 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Ovago	Price Accuracy2 stars	Trust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on St. Louis-Barcelona-El Prat Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Barcelona-El Prat Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Barcelona-El Prat Airport flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-Barcelona-El Prat Airport flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Barcelona-El Prat Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Barcelona-El Prat

Have a flexible travel schedule? Discover the best time to fly to Barcelona-El Prat from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Barcelona-El Prat Airport

How far ahead should I book a flight from St. Louis to Barcelona-El Prat Airport?

The best time to book flights from St. Louis to Barcelona-El Prat Airport is 85 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from St. Louis to Barcelona-El Prat Airport?

Currently, November is the cheapest month in which you can book a flight from St. Louis to Barcelona-El Prat Airport (average of $529). Flying from St. Louis to Barcelona-El Prat Airport in June is currently the most expensive (average of $1,095). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to BCN?

It’s optimal to fly from St. Louis to Barcelona-El Prat Airport in the evening. By choosing this option you can save up to 22% on the cost of your flight, compared to a flight in the afternoon.

How much does it cost to fly round-trip from St. Louis to Barcelona-El Prat Airport?

Reviews of airlines servicing Barcelona-El Prat

Peruse reviews from past customers who have flown with United Airlines, American Airlines, and Air Canada from St. Louis to Barcelona-El Prat Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,999 reviews

Reviews

1 / 20

2.0

Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

United Airlines

7.4

Good

8,999 reviews

United Airlines

7.4

Good

8,999 reviews

Reviews

1 / 20

2.0

Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

American Airlines

7.2

Good

11,034 reviews

United Airlines

7.4

Good

8,999 reviews

Reviews

1 / 20

2.0

Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Air Canada

7.1

Good

10,371 reviews

United Airlines

7.4

Good

8,999 reviews

Reviews

1 / 20

2.0

Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Iberia

7.0

Good

3,001 reviews

United Airlines

7.4

Good

8,999 reviews

Reviews

1 / 20

2.0

Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

British Airways

6.7

Okay

7,482 reviews

United Airlines

7.4

Good

8,999 reviews

Reviews

1 / 20

2.0

Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Related info for your journey

What airport do you fly from for flights from St. Louis to Barcelona-El Prat?
Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Barcelona-El Prat. You should not have trouble finding flights to Barcelona-El Prat from Lambert-St Louis; the airport handles an average of 0 outbound flights to Barcelona-El Prat per day. You should also have plenty of airline options to choose from since 8 airlines have flights from the St. Louis airport to Barcelona-El Prat. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.
How long is the flight from St. Louis to Barcelona-El Prat Airport?
For as low as $426, Virgin Atlantic can have you in Barcelona-El Prat Airport from St. Louis in 11h 45m. There are 4638 mi between St. Louis and Barcelona-El Prat Airport. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
What are the cheapest airlines flying from St. Louis to Barcelona-El Prat Airport round-trip?
Our cheapest airline available from St. Louis to Barcelona-El Prat Airport is Delta. Our recent data shows that you can find tickets from as low as $552 on this airline. Additional options worth looking into are United Airlines and KLM, starting at $578 and $590 round-trip. Delta is priced at 40% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from St. Louis to Barcelona-El Prat Airport one-way?
One-way options have recently been found by users for as low as $381 on Scandinavian Airlines. Other airlines that offer cheap prices include Air Canada from $391 and Lufthansa from $392 one-way.
Can I find deals for flights from St. Louis to Barcelona-El Prat that include hotel bookings?
Yes. In addition to deals on St. Louis to Barcelona-El Prat flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Barcelona-El Prat?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Barcelona-El Prat.
Can I find deals for business class flights from St. Louis to Barcelona-El Prat?
Yes. Cheapflights offers flight deals from St. Louis to Barcelona-El Prat by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Barcelona-El Prat Airport?
Currently, November is the cheapest month in which you can book a flight from St. Louis to Barcelona-El Prat Airport (average of $529). Flying from St. Louis to Barcelona-El Prat Airport in June is currently the most expensive (average of $1,095). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Calella

Roses

L'Hospitalet de Llobregat

Cadaques

El Prat de Llobregat

Badalona

Pineda de Mar

Browse thousands of different options on Cheapflights for your next trip

Top 8 airlines flying from St. Louis to Barcelona-El Prat

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$552	Average$1,025	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$578	Average$1,038	FlexibilityNo cancel fee	On-time69%
KLM	Cheapest$590	Average$745	FlexibilityNo cancel fee	On-time75%
British Airways	Cheapest$602	Average$921	FlexibilityNo cancel fee	On-time70%
Lufthansa	Cheapest$614	Average$958	FlexibilityNo cancel fee	On-time76%
Air Canada	Cheapest$624	Average$1,242	FlexibilityNo cancel fee	On-time67%
Iberia	Cheapest$631	Average$1,002	FlexibilityNo cancel fee	On-time77%
American Airlines	Cheapest$648	Average$1,122	FlexibilityNo cancel fee	On-time71%

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$272+ Cheap flights from St. Louis (STL) to Barcelona-El Prat (BCN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/23. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Barcelona-El Prat with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Lambert-St Louis to Barcelona-El Prat are usually found in February or November, booked 85 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Find flight deals from St. Louis to Barcelona-El Prat

Cheapest flights from St. Louis to Barcelona-El PratExplore the most affordable flight options available from St. Louis to Barcelona-El Prat. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 28, 2025.

Explore the most affordable flight options available from St. Louis to Barcelona-El Prat. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 28, 2025.

Cheap flight deals from St. Louis to Barcelona-El Prat

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Barcelona-El Prat Airport that are best for you.

Compare providers for flights from St. Louis to Barcelona-El Prat

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Barcelona-El Prat in October.

Best time to book a flight from St. Louis to Barcelona-El Prat

Have a flexible travel schedule? Discover the best time to fly to Barcelona-El Prat from St. Louis with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Barcelona-El Prat Airport

How far ahead should I book a flight from St. Louis to Barcelona-El Prat Airport?

What is the cheapest month to book a flight from St. Louis to Barcelona-El Prat Airport?

What is the cheapest time of day to fly from STL to BCN?

How much does it cost to fly round-trip from St. Louis to Barcelona-El Prat Airport?

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Top 8 airlines flying from St. Louis to Barcelona-El Prat

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Cheapest flights from St. Louis to Barcelona-El Prat
Explore the most affordable flight options available from St. Louis to Barcelona-El Prat. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 28, 2025.