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$475+ Cheap flights from St. Louis (STL) to Barcelona

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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BCN
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Barcelona are usually found in February or January, booked 29 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap flight deals from St. Louis to Barcelona

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Barcelona (S37). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 17, 2025.

Round-trip from

$764
(Gotogate)

One-way from

$506
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$933
From Lambert-St Louis to Barcelona
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One-way flight from Lambert-St Louis to Barcelona
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Highest demand for flights based on searches. 21% potential increase in price ($262 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from St. Louis to Barcelona

Cheapest flights from St. Louis to Barcelona
Explore the most affordable flight options available from St. Louis to Barcelona. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

This Delta deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/176:00 amSTL - BCN
1 stop17h 00mDelta
Fri 10/39:00 amBCN - STL
1 stop18h 50mDelta
Deal found 4/15$572
This Air Canada deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/191:30 pmSTL - BCN
1 stop11h 20mAir Canada
Wed 10/112:15 pmBCN - STL
2 stops34h 23mAir Canada
Deal found 4/15$595
This Expedia deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/164:05 pmSTL - BCN
2 stops45h 25mMultiple Airlines
Tue 9/301:15 pmBCN - STL
1 stop13h 18mMultiple Airlines
Deal found 4/15$597
This United Airlines deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/195:18 pmSTL - BCN
1 stop12h 47mUnited Airlines
Wed 11/2612:15 pmBCN - STL
2 stops31h 05mUnited Airlines
Deal found 4/16$599
This Expedia deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/167:59 pmSTL - BCN
2 stops43h 46mBritish Airways
Tue 9/3010:15 amBCN - STL
2 stops17h 06mBritish Airways
Deal found 4/15$605
This Gurufare deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/193:45 pmSTL - BCN
1 stop13h 30mLufthansa
Wed 11/266:50 amBCN - STL
1 stop14h 05mLufthansa
Deal found 4/16$618
This Iberia deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1712:07 pmSTL - BCN
1 stop15h 03mIberia
Thu 10/210:45 amBCN - STL
1 stop15h 23mIberia
Deal found 4/16$621
This KLM deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/231:30 pmSTL - BCN
2 stops15h 25mKLM
Sat 9/69:30 amBCN - STL
1 stop18h 17mKLM
Deal found 4/17$797
This Cheapflightsfares deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/246:15 amSTL - BCN
2 stops33h 20mAer Lingus
Mon 5/511:05 pmBCN - STL
2 stops29h 47mAer Lingus
Deal found 4/17$1,044
This KAYAK deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/251:30 pmSTL - BCN
2 stops21h 40mScandinavian Airlines
Sun 6/298:25 pmBCN - STL
2 stops34h 26mScandinavian Airlines
Deal found 4/15$1,151

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis to Barcelona that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 17, 2025.
Use the filters below to find and compare flights from St. Louis to Barcelona that are best for you.

Fly from

St. Louis

Fly to

Barcelona

Route

Depart

Return

Price

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 9/17

6:00 am-6:00 am

1 stop17h 00m

Barcelona-El Prat

Fri 10/3

9:00 am-8:50 pm

1 stop18h 50m

$572

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 9/19

1:30 pm-7:50 am

1 stop11h 20m

Barcelona-El Prat

Wed 10/1

12:15 pm-3:38 pm

2 stops34h 23m

$595

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 9/16

4:05 pm-8:30 pm

2 stops45h 25m

Barcelona-El Prat

Tue 9/30

1:15 pm-7:33 pm

1 stop13h 18m

$597

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 9/16

7:59 pm-10:45 pm

2 stops43h 46m

Barcelona-El Prat

Tue 9/30

10:15 am-8:21 pm

2 stops17h 06m

$605

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 9/17

12:07 pm-10:10 am

1 stop15h 03m

Barcelona-El Prat

Thu 10/2

10:45 am-7:08 pm

1 stop15h 23m

$621

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/14

6:35 am-1:15 pm

1 stop23h 40m

Barcelona-El Prat

Tue 9/30

12:10 pm-2:19 pm

2 stops33h 09m

$660

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/14

5:30 pm-9:40 pm

2 stops21h 10m

Barcelona-El Prat

Fri 10/3

10:15 am-3:38 pm

2 stops36h 23m

$731

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 8/23

1:30 pm-11:55 am

2 stops15h 25m

Barcelona-El Prat

Sat 9/6

9:30 am-8:47 pm

1 stop18h 17m

$797

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 6/25

1:30 pm-6:10 pm

2 stops21h 40m

Barcelona-El Prat

Sun 6/29

8:25 pm-11:51 pm

2 stops34h 26m

$1,151

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 6/25

5:25 am-7:35 am

1 stop19h 10m

Barcelona-El Prat

Mon 6/30

6:30 pm-9:31 am

1 stop22h 01m

$1,232

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Showing 1-10 of 22 results
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Best time to book a flight from St. Louis to Barcelona

Have a flexible travel schedule? Discover the best time to fly to Barcelona 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

How far ahead should I book a flight from St. Louis to Barcelona?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Barcelona. Price data was last updated on April 11, 2025.

To ensure you get the cheapest price possible for a flight from St. Louis to Barcelona, you should look to book at least 29 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from St. Louis to Barcelona?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Barcelona (average of $523). Flying from St. Louis to Barcelona in June is currently the most expensive (average of $1,079). 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?

Find hourly flight availability from St. Louis to Barcelona. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 17, 2025.

It’s optimal to fly from St. Louis to Barcelona in the morning. By choosing this option you can save up to 14% on the cost of your flight, compared to a flight in the afternoon.

Rainfall in Barcelona by month

Plan your trip to Barcelona by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Barcelona 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 when rainfall is around 0.8 in.

Temperature in Barcelona by month

Plan your trip to Barcelona by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Barcelona, 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).

Reviews of airlines servicing Barcelona

Get insights into the airlines that provide service to Barcelona. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Barcelona. Reviews last updated April 17, 2025.
Peruse reviews from past customers who have flown with Asiana Airlines, Delta and KLM from St. Louis to Barcelona to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Asiana Airlines
8.2
Very good
438 reviews

Food

8.0

Boarding

8.3

Overall

8.2

Crew

8.5

Comfort

8.0

Entertainment

7.7

Reviews

1 / 20
4.0
Okay

Ramón,Feb 2025

ICN - SGN

The same as my experience from NYC to Incheon, just 1 EVER LASTING LONG LINE. No group calling out anything, just telling everyone to line up.
Asiana Airlines
8.2
Very good
438 reviews
Asiana Airlines
8.2
Very good
438 reviews

Food

8.0

Boarding

8.3

Overall

8.2

Crew

8.5

Comfort

8.0

Entertainment

7.7

Reviews

1 / 20
4.0
Okay

Ramón,Feb 2025

ICN - SGN

The same as my experience from NYC to Incheon, just 1 EVER LASTING LONG LINE. No group calling out anything, just telling everyone to line up.
Delta
8.0
Very good
7,917 reviews
Asiana Airlines
8.2
Very good
438 reviews

Food

8.0

Boarding

8.3

Overall

8.2

Crew

8.5

Comfort

8.0

Entertainment

7.7

Reviews

1 / 20
4.0
Okay

Ramón,Feb 2025

ICN - SGN

The same as my experience from NYC to Incheon, just 1 EVER LASTING LONG LINE. No group calling out anything, just telling everyone to line up.
KLM
7.8
Good
1,329 reviews
Asiana Airlines
8.2
Very good
438 reviews

Food

8.0

Boarding

8.3

Overall

8.2

Crew

8.5

Comfort

8.0

Entertainment

7.7

Reviews

1 / 20
4.0
Okay

Ramón,Feb 2025

ICN - SGN

The same as my experience from NYC to Incheon, just 1 EVER LASTING LONG LINE. No group calling out anything, just telling everyone to line up.
Finnair
7.6
Good
1,269 reviews
Asiana Airlines
8.2
Very good
438 reviews

Food

8.0

Boarding

8.3

Overall

8.2

Crew

8.5

Comfort

8.0

Entertainment

7.7

Reviews

1 / 20
4.0
Okay

Ramón,Feb 2025

ICN - SGN

The same as my experience from NYC to Incheon, just 1 EVER LASTING LONG LINE. No group calling out anything, just telling everyone to line up.
Austrian Airlines
7.6
Good
775 reviews
Asiana Airlines
8.2
Very good
438 reviews

Food

8.0

Boarding

8.3

Overall

8.2

Crew

8.5

Comfort

8.0

Entertainment

7.7

Reviews

1 / 20
4.0
Okay

Ramón,Feb 2025

ICN - SGN

The same as my experience from NYC to Incheon, just 1 EVER LASTING LONG LINE. No group calling out anything, just telling everyone to line up.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Barcelona. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Barcelona?

    If you book a flight to Barcelona from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 0 flights from Lambert-St Louis to Barcelona per day from 9 different airlines.

  • What are the cheapest airlines flying from St. Louis to Barcelona round-trip?

    United Airlines, at $765, was found to be the cheapest airline from St. Louis to Barcelona.Alternate airlines to your destination round-trip include Air Canada and British Airways. You may be able to fly from St. Louis to Barcelona for 22% less than the average price by searching for these airlines.

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

    The cheapest airlines for a one-way flight from St. Louis to Barcelona are Air Canada ($578), United Airlines ($585), and Aer Lingus ($628).

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

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

  • How can I find direct flights from St. Louis to Barcelona?

    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.

  • Can I find deals for business class flights from St. Louis to Barcelona?

    Yes. Cheapflights offers flight deals from St. Louis to Barcelona 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?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Barcelona (average of $523). Flying from St. Louis to Barcelona in June is currently the most expensive (average of $1,079). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for St. Louis to Barcelona

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Barcelona-El Prat flights
Kansas City to Barcelona-El Prat flights
Springfield to Barcelona-El Prat flights
Joplin to Barcelona-El Prat flights

Top 9 airlines flying from St. Louis to Barcelona

Discover the top 9 airlines that operate flights from St. Louis to Barcelona. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$530Average$982FlexibilityNo cancel feeOn-time76%
KLMCheapest$540Average$810FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$571Average$777FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$602Average$966FlexibilityNo cancel feeOn-time70%
DeltaCheapest$602Average$944FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$632Average$1,051FlexibilityNo cancel feeOn-time71%
IberiaCheapest$689Average$1,066FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$712Average$1,116FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$716Average$1,100FlexibilityNo cancel feeOn-time69%

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