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$418+ 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 7/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BCN
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
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 March 28, 2025.

Round-trip from

$841
(CheapOair)

One-way from

$418
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$938
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. 20% potential increase in price ($256 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 28, 2025.

This CheapOair deal was found by Cheapflights users on 3/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/53:43 pmSTL - BCN
2 stops33h 07mAir Canada
Sun 5/1112:15 pmBCN - STL
1 stop14h 43mAir Canada
Deal found 3/27$841
This United Airlines deal was found by Cheapflights users on 3/27. 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.
Sun 5/111:30 pmSTL - BCN
1 stop11h 20mUnited Airlines
Sun 5/186:00 amBCN - STL
2 stops16h 47mUnited Airlines
Deal found 3/27$862
This oojo deal was found by Cheapflights users on 3/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/257:44 amSTL - BCN
1 stop19h 46mBritish Airways
Mon 10/69:10 pmBCN - STL
2 stops25h 58mBritish Airways
Deal found 3/27$863
This FlightHub deal was found by Cheapflights users on 3/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/111:30 pmSTL - BCN
2 stops21h 40mScandinavian Airlines
Fri 9/197:00 pmBCN - STL
2 stops32h 47mScandinavian Airlines
Deal found 3/27$873
This Lufthansa deal was found by Cheapflights users on 3/27. 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.
Sun 4/133:30 pmSTL - BCN
1 stop17h 45mLufthansa
Sun 4/206:50 amBCN - STL
1 stop13h 40mLufthansa
Deal found 3/27$880
This Aeromexico deal was found by Cheapflights users on 3/27. 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 Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/124:30 pmSTL - BCN
1 stop33h 50mAir France
Mon 4/214:35 pmBCN - STL
2 stops31h 17mAir France
Deal found 3/27$886
This Delta deal was found by Cheapflights users on 3/27. 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.
Sun 4/137:12 pmSTL - BCN
2 stops16h 38mDelta
Sun 4/206:10 amBCN - STL
2 stops24h 24mDelta
Deal found 3/27$899
This Cheapflightsfares deal was found by Cheapflights users on 3/27. 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.
Mon 7/2112:27 pmSTL - BCN
1 stop14h 43mIberia
Fri 8/82:00 pmBCN - STL
1 stop13h 13mIberia
Deal found 3/27$913
This United deal was found by Cheapflights users on 3/27. 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.
Thu 7/178:00 amSTL - BCN
1 stop22h 15mMultiple Airlines
Thu 7/2412:10 pmBCN - STL
2 stops34h 06mMultiple Airlines
Deal found 3/27$996
This Virgin Atlantic deal was found by Cheapflights users on 3/27. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2512:51 pmSTL - BCN
1 stop13h 29mVirgin Atlantic
Sun 5/411:35 amBCN - STL
1 stop19h 01mVirgin Atlantic
Deal found 3/27$1,036
This Finnair deal was found by Cheapflights users on 3/27. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/224:23 pmSTL - BCN
1 stop11h 07mFinnair
Wed 7/1610:45 amBCN - STL
1 stop20h 04mFinnair
Deal found 3/27$1,101
This Cheapflightsfares deal was found by Cheapflights users on 3/27. 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.
Tue 4/110:12 amSTL - BCN
2 stops29h 13mAer Lingus
Fri 4/411:00 amBCN - STL
2 stops19h 33mAer Lingus
Deal found 3/27$1,124

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 March 28, 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

Mon 5/5

3:43 pm-7:50 am

2 stops33h 07m

Barcelona-El Prat

Sun 5/11

12:15 pm-7:58 pm

1 stop14h 43m

$841

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 5/11

1:30 pm-7:50 am

1 stop11h 20m

Barcelona-El Prat

Sun 5/18

6:00 am-3:47 pm

2 stops16h 47m

$862

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Thu 9/11

1:30 pm-6:10 pm

2 stops21h 40m

Barcelona-El Prat

Fri 9/19

7:00 pm-8:47 pm

2 stops32h 47m

$873

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 4/13

1:05 pm-9:20 am

1 stop13h 15m

Barcelona-El Prat

Sun 4/20

6:10 am-11:34 pm

2 stops24h 24m

$876

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 4/13

3:30 pm-4:15 pm

1 stop17h 45m

Barcelona-El Prat

Sun 4/20

6:50 am-1:30 pm

1 stop13h 40m

$880

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 4/12

4:30 pm-9:20 am

1 stop33h 50m

Barcelona-El Prat

Mon 4/21

4:35 pm-4:52 pm

2 stops31h 17m

$886

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 7/21

12:27 pm-10:10 am

1 stop14h 43m

Barcelona-El Prat

Fri 8/8

2:00 pm-8:13 pm

1 stop13h 13m

$913

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 4/25

5:27 pm-7:05 pm

2 stops18h 38m

Barcelona-El Prat

Sun 5/4

9:20 pm-6:33 pm

2 stops28h 13m

$938

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Thu 7/17

8:00 am-1:15 pm

1 stop22h 15m

Barcelona-El Prat

Thu 7/24

12:10 pm-3:16 pm

2 stops34h 06m

$996

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 4/25

12:51 pm-9:20 am

1 stop13h 29m

Barcelona-El Prat

Sun 5/4

11:35 am-11:36 pm

1 stop19h 01m

$1,036

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 20 results
1
2

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 March 21, 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 $1,080). 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 March 28, 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 March 28, 2025.
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,897 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,321 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.4
Good
1,424 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,603 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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?

    Air Canada, at $841, was found to be the cheapest airline from St. Louis to Barcelona.Alternate airlines to your destination round-trip include United Airlines and Scandinavian Airlines. You may be able to fly from St. Louis to Barcelona for 14% 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 ($603), KLM ($608), and Air France ($625).

  • 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 $1,080). 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.
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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$530Average$931FlexibilityNo cancel feeOn-time76%
KLMCheapest$540Average$854FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$602Average$967FlexibilityNo cancel feeOn-time70%
DeltaCheapest$602Average$895FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$645Average$777FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$648Average$1,047FlexibilityNo cancel feeOn-time71%
IberiaCheapest$689Average$1,081FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$716Average$1,104FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$732Average$1,107FlexibilityNo cancel feeOn-time67%
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