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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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BCN
May 5 — May 121
Mon 5/5
Mon 5/12
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 30, 2025.

Round-trip from

$645
(Booking.com)

One-way from

$418
(Ovago)

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. 20% potential increase in price ($257 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($28 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 30, 2025.

This Iberia deal was found by Cheapflights users on 4/29. 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.
Mon 9/19:50 amSTL - BCN
1 stop17h 20mIberia
Sat 9/1312:20 pmBCN - STL
1 stop17h 07mIberia
Deal found 4/29$642
This Delta deal was found by Cheapflights users on 4/29. 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.
Mon 9/12:18 pmSTL - BCN
2 stops17h 32mDelta
Sat 9/136:10 amBCN - STL
2 stops18h 52mDelta
Deal found 4/29$687
This oojo deal was found by Cheapflights users on 4/29. 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 9/258:01 pmSTL - BCN
2 stops16h 44mBritish Airways
Mon 10/68:25 pmBCN - STL
2 stops26h 43mBritish Airways
Deal found 4/29$698
This CheapOair deal was found by Cheapflights users on 4/29. 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.
Sat 8/234:00 pmSTL - BCN
2 stops32h 50mAir Canada
Sat 9/612:10 pmBCN - STL
2 stops33h 09mAir Canada
Deal found 4/29$711
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/256:25 amSTL - BCN
1 stop19h 40mAmerican Airlines
Mon 10/610:45 amBCN - STL
1 stop16h 38mAmerican Airlines
Deal found 4/29$722
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Sat 8/235:30 pmSTL - BCN
2 stops31h 20mUnited Airlines
Sat 9/612:10 pmBCN - STL
1 stop14h 47mUnited Airlines
Deal found 4/29$733
This Air Canada deal was found by Cheapflights users on 4/29. 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.
Sat 8/99:09 amSTL - BCN
2 stops15h 41mMultiple Airlines
Sat 8/161:15 pmBCN - STL
2 stops37h 45mMultiple Airlines
Deal found 4/29$1,053
This Gurufare deal was found by Cheapflights users on 4/29. 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.
Sun 6/11:00 pmSTL - BCN
1 stop12h 20mLufthansa
Sun 6/151:50 pmBCN - STL
2 stops15h 57mLufthansa
Deal found 4/29$1,196
This Gurufare deal was found by Cheapflights users on 4/29. 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.
Tue 5/136:00 amSTL - BCN
2 stops33h 25mAer Lingus
Fri 5/1611:00 amBCN - STL
2 stops19h 51mAer Lingus
Deal found 4/29$1,215
This KLM deal was found by Cheapflights users on 4/29. 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 7/31:30 pmSTL - BCN
1 stop12h 50mKLM
Wed 7/911:35 amBCN - STL
1 stop19h 18mKLM
Deal found 4/29$3,042

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 30, 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 9/1

9:50 am-10:10 am

1 stop17h 20m

Barcelona-El Prat

Sat 9/13

12:20 pm-10:27 pm

1 stop17h 07m

$642

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 9/1

2:18 pm-2:50 pm

2 stops17h 32m

Barcelona-El Prat

Sat 9/13

6:10 am-6:02 pm

2 stops18h 52m

$687

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Thu 9/25

8:01 pm-7:45 pm

2 stops16h 44m

Barcelona-El Prat

Mon 10/6

8:25 pm-4:08 pm

2 stops26h 43m

$698

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 8/23

4:00 pm-7:50 am

2 stops32h 50m

Barcelona-El Prat

Sat 9/6

12:10 pm-2:19 pm

2 stops33h 09m

$711

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Thu 9/25

6:25 am-9:05 am

1 stop19h 40m

Barcelona-El Prat

Mon 10/6

10:45 am-8:23 pm

1 stop16h 38m

$722

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 8/23

5:30 pm-7:50 am

2 stops31h 20m

Barcelona-El Prat

Sat 9/6

12:10 pm-7:57 pm

1 stop14h 47m

$733

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 8/9

9:09 am-7:50 am

2 stops15h 41m

Barcelona-El Prat

Sat 8/16

1:15 pm-8:00 pm

2 stops37h 45m

$1,053

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 6/1

1:00 pm-8:20 am

1 stop12h 20m

Barcelona-El Prat

Sun 6/15

1:50 pm-10:47 pm

2 stops15h 57m

$1,196

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 5/13

6:00 am-10:25 pm

2 stops33h 25m

Barcelona-El Prat

Fri 5/16

11:00 am-11:51 pm

2 stops19h 51m

$1,215

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Thu 7/3

1:30 pm-9:20 am

1 stop12h 50m

Barcelona-El Prat

Wed 7/9

11:35 am-11:53 pm

1 stop19h 18m

$3,042

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 19 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 April 25, 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 $1,064). 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 30, 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 30, 2025.
Delta
8.0
Very good
7,936 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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
8,696 reviews
Delta
8.0
Very good
7,936 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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.
Virgin Atlantic
7.4
Good
642 reviews
Delta
8.0
Very good
7,936 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,936 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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 Canada
7.0
Good
9,242 reviews
Delta
8.0
Very good
7,936 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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 8 different airlines.

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

    Air Canada, at $645, was found to be the cheapest airline from St. Louis to Barcelona.Alternate airlines to your destination round-trip include British Airways and Iberia. You may be able to fly from St. Louis to Barcelona for 34% 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 Aer Lingus ($418), American Airlines ($448), and Air Canada ($490).

  • 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 $1,064). 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 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$527Average$958FlexibilityNo cancel feeOn-time76%
KLMCheapest$540Average$810FlexibilityNo cancel feeOn-time75%
DeltaCheapest$541Average$1,040FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$571Average$777FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$602Average$974FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$648Average$1,037FlexibilityNo cancel feeOn-time71%
IberiaCheapest$689Average$1,066FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$697Average$1,094FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$712Average$1,126FlexibilityNo cancel feeOn-time67%

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