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$320+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BCN
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Barcelona are usually found in February or November, booked 24 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 June 12, 2025.

Round-trip from

$580
(Gotogate)

One-way from

$320
(Mytrip)

Popular in

June

Cheapest in

February

Average price

$1,347
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 ($272 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Booking.com deal was found by Cheapflights users on 6/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/241:30 pmSTL - BCN
1 stop11h 20mAir Canada
Wed 10/112:10 pmBCN - STL
1 stop14h 47mAir Canada
Deal found 6/11$544
This United Airlines deal was found by Cheapflights users on 6/12. 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.
Tue 9/231:30 pmSTL - BCN
1 stop11h 20mUnited Airlines
Tue 10/712:10 pmBCN - STL
2 stops29h 39mUnited Airlines
Deal found 6/12$555
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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.
Wed 10/19:56 amSTL - BCN
1 stop17h 34mIberia
Fri 10/1010:45 amBCN - STL
1 stop16h 38mIberia
Deal found 6/10$601
This British Airways deal was found by Cheapflights users on 6/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/15:55 amSTL - BCN
1 stop21h 35mBritish Airways
Fri 10/1010:45 amBCN - STL
1 stop16h 38mBritish Airways
Deal found 6/10$607
This United deal was found by Cheapflights users on 6/12. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/48:15 amSTL - BCN
1 stop17h 05mMultiple Airlines
Wed 8/2012:10 pmBCN - STL
1 stop14h 50mMultiple Airlines
Deal found 6/12$625
This Lufthansa deal was found by Cheapflights users on 6/10. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/33:30 pmSTL - BCN
1 stop21h 15mLufthansa
Tue 10/76:50 amBCN - STL
2 stops15h 54mLufthansa
Deal found 6/10$662
This Scandinavian Airlines deal was found by Cheapflights users on 6/10. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/143:42 pmSTL - BCN
2 stops19h 28mScandinavian Airlines
Thu 8/217:00 pmBCN - STL
2 stops33h 27mScandinavian Airlines
Deal found 6/10$696
This Austrian Airlines deal was found by Cheapflights users on 6/10. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/212:25 pmSTL - BCN
2 stops24h 25mAustrian Airlines
Fri 10/1010:00 amBCN - STL
2 stops44h 47mAustrian Airlines
Deal found 6/10$729
This Delta deal was found by Cheapflights users on 6/12. 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 9/104:20 pmSTL - BCN
1 stop12h 35mDelta
Sat 9/279:00 amBCN - STL
1 stop14h 00mDelta
Deal found 6/12$737
This Air France deal was found by Cheapflights users on 6/12. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/135:25 pmSTL - BCN
2 stops14h 25mAir France
Sat 9/279:00 amBCN - STL
1 stop14h 00mAir France
Deal found 6/12$816
This KLM deal was found by Cheapflights users on 6/12. 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.
Thu 9/257:05 pmSTL - BCN
2 stops14h 20mKLM
Tue 9/306:20 amBCN - STL
2 stops16h 40mKLM
Deal found 6/12$817

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 June 12, 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 9/24

1:30 pm-7:50 am

1 stop11h 20m

Barcelona-El Prat

Wed 10/1

12:10 pm-7:57 pm

1 stop14h 47m

$544

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 9/23

1:30 pm-7:50 am

1 stop11h 20m

Barcelona-El Prat

Tue 10/7

12:10 pm-10:49 am

2 stops29h 39m

$555

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 10/1

9:56 am-10:30 am

1 stop17h 34m

Barcelona-El Prat

Fri 10/10

10:45 am-8:23 pm

1 stop16h 38m

$601

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 10/1

5:55 am-10:30 am

1 stop21h 35m

Barcelona-El Prat

Fri 10/10

10:45 am-8:23 pm

1 stop16h 38m

$607

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 8/4

8:15 am-8:20 am

1 stop17h 05m

Barcelona-El Prat

Wed 8/20

12:10 pm-8:00 pm

1 stop14h 50m

$625

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 10/3

3:30 pm-7:45 pm

1 stop21h 15m

Barcelona-El Prat

Tue 10/7

6:50 am-3:44 pm

2 stops15h 54m

$662

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Thu 8/14

3:42 pm-6:10 pm

2 stops19h 28m

Barcelona-El Prat

Thu 8/21

7:00 pm-9:27 pm

2 stops33h 27m

$696

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Thu 10/2

12:25 pm-7:50 pm

2 stops24h 25m

Barcelona-El Prat

Fri 10/10

10:00 am-11:47 pm

2 stops44h 47m

$729

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 9/10

4:20 pm-11:55 am

1 stop12h 35m

Barcelona-El Prat

Sat 9/27

9:00 am-4:00 pm

1 stop14h 00m

$737

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 9/13

5:25 pm-2:50 pm

2 stops14h 25m

Barcelona-El Prat

Sat 9/27

9:00 am-4:00 pm

1 stop14h 00m

$816

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 June 9, 2025.

To ensure you get the cheapest price possible for a flight from St. Louis to Barcelona, you should look to book at least 24 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 $1,062). 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 June 12, 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 June 12, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and United Airlines 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.
Delta
8.0
Very good
7,950 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Scandinavian Airlines
7.3
Good
1,387 reviews
Delta
8.0
Very good
7,950 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,950 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 8 different airlines.

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

    Air Canada, at $580, was found to be the cheapest airline from St. Louis to Barcelona.Alternate airlines to your destination round-trip include United Airlines and Iberia. You may be able to fly from St. Louis to Barcelona for 40% 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 ($463), Lufthansa ($465), and KLM ($468).

  • 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 $1,062). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Barcelona

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

Top 8 airlines flying from St. Louis to Barcelona

Discover the top 8 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$468Average$751FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$530Average$1,022FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$602Average$936FlexibilityNo cancel feeOn-time70%
DeltaCheapest$602Average$1,040FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$630Average$1,041FlexibilityNo cancel feeOn-time71%
IberiaCheapest$631Average$1,061FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$637Average$1,086FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$673Average$1,235FlexibilityNo cancel feeOn-time67%

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