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$242+ 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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BCN
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
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 10 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap 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 December 18, 2025.

This CheapOair deal was found by Cheapflights users on 12/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/186:35 pmSTL - BCN
2 stops16h 10mMultiple Airlines
Thu 12/251:35 pmBCN - STL
2 stops31h 51mMultiple Airlines
Deal found 12/17$1,016
This FlightHub deal was found by Cheapflights users on 12/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:35 pmSTL - BCN
2 stops38h 55mBritish Airways
Tue 1/62:40 pmBCN - STL
2 stops39h 04mBritish Airways
Deal found 12/15$1,358
This Gurufare deal was found by Cheapflights users on 12/17. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/181:05 pmSTL - BCN
1 stop12h 15mLufthansa
Thu 12/2511:00 amBCN - STL
1 stop19h 43mLufthansa
Deal found 12/17$1,395
This United Airlines deal was found by Cheapflights users on 12/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/238:15 amSTL - BCN
1 stop17h 05mUnited Airlines
Tue 1/66:45 amBCN - STL
2 stops24h 14mUnited Airlines
Deal found 12/15$1,601
This United Airlines deal was found by Cheapflights users on 12/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:30 amSTL - BCN
2 stops20h 05mUnited Airlines
Sun 1/49:55 amBCN - STL
2 stops34h 25mUnited Airlines
Deal found 12/15$1,728
This oojo deal was found by Cheapflights users on 12/16. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/205:16 pmSTL - BCN
2 stops19h 59mBritish Airways
Mon 12/229:00 pmBCN - STL
2 stops26h 46mBritish Airways
Deal found 12/16$1,750
This United Airlines deal was found by Cheapflights users on 12/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/263:10 pmSTL - BCN
2 stops21h 40mUnited Airlines
Fri 1/29:55 amBCN - STL
2 stops37h 32mUnited Airlines
Deal found 12/15$1,903
This Finnair deal was found by Cheapflights users on 12/15. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/231:59 pmSTL - BCN
1 stop12h 01mMultiple Airlines
Tue 1/611:00 amBCN - STL
1 stop19h 59mMultiple Airlines
Deal found 12/15$1,921
This Finnair deal was found by Cheapflights users on 12/15. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:30 amSTL - BCN
1 stop20h 30mMultiple Airlines
Sun 1/411:00 amBCN - STL
1 stop18h 35mMultiple Airlines
Deal found 12/15$1,924
This United Airlines deal was found by Cheapflights users on 12/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/233:10 pmSTL - BCN
2 stops35h 25mUnited Airlines
Sat 1/311:55 amBCN - STL
2 stops36h 59mUnited Airlines
Deal found 12/15$1,927
This Finnair deal was found by Cheapflights users on 12/15. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/261:59 pmSTL - BCN
1 stop12h 01mMultiple Airlines
Fri 1/211:00 amBCN - STL
1 stop18h 35mMultiple Airlines
Deal found 12/15$1,953

Find 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 December 18, 2025.

Round-trip from

$452
(Kiwi.com)

One-way from

$242
(oojo)

Popular in

June

Cheapest in

February

Average price

$835
From Lambert-St Louis to Barcelona
Search Deals
One-way flight from Lambert-St Louis to Barcelona
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($282 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 18, 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 1/14

3:50 pm-12:00 pm

1 stop13h 10m

Barcelona-El Prat

Sun 1/25

11:00 am-11:59 pm

1 stop19h 59m

$452

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 3/17

7:00 pm-5:35 pm

2 stops16h 35m

Barcelona-El Prat

Wed 3/25

11:00 am-11:51 pm

1 stop18h 51m

$472

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 1/28

6:44 pm-4:30 pm

2 stops14h 46m

Barcelona-El Prat

Fri 2/6

12:30 pm-10:44 pm

1 stop17h 14m

$473

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 3/16

4:05 pm-5:35 pm

2 stops19h 30m

Barcelona-El Prat

Wed 3/25

12:35 pm-9:42 pm

2 stops39h 07m

$474

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 2/1

6:00 am-9:00 am

1 stop20h 00m

Barcelona-El Prat

Tue 2/17

11:00 am-10:05 pm

1 stop18h 05m

$484

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 3/17

11:59 am-11:55 am

1 stop17h 56m

Barcelona-El Prat

Wed 3/25

11:15 am-11:04 pm

1 stop17h 49m

$484

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 2/4

10:10 am-9:35 am

2 stops16h 25m

Barcelona-El Prat

Sun 2/8

5:50 am-9:13 pm

2 stops22h 23m

$492

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 1/14

7:00 am-9:35 am

2 stops19h 35m

Barcelona-El Prat

Sun 1/18

11:00 am-9:13 pm

2 stops17h 13m

$492

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 3/15

5:15 pm-7:00 am

1 stop31h 45m

Barcelona-El Prat

Wed 3/25

1:00 pm-11:36 am

2 stops28h 36m

$496

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 1/30

6:40 pm-5:35 pm

2 stops15h 55m

Barcelona-El Prat

Fri 2/6

6:45 am-7:27 pm

2 stops19h 42m

$498

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 15 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 December 12, 2025.

To ensure you get the cheapest price possible for a flight from St. Louis to Barcelona, you should look to book at least 10 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 $513). Flying from St. Louis to Barcelona in June is currently the most expensive (average of $1,094). 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 December 18, 2025.

It’s optimal to fly from St. Louis to Barcelona 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?

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 December 18, 2025.
See what other customers who have flown with United Airlines, American Airlines, and Air Canada from St. Louis to Barcelona have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,091 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability
United Airlines
7.4
Good
9,091 reviews
United Airlines
7.4
Good
9,091 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability
American Airlines
7.2
Good
11,054 reviews
United Airlines
7.4
Good
9,091 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability
Air Canada
7.1
Good
10,534 reviews
United Airlines
7.4
Good
9,091 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability
Iberia
7.0
Good
3,050 reviews
United Airlines
7.4
Good
9,091 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability
British Airways
6.7
Okay
7,585 reviews
United Airlines
7.4
Good
9,091 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability

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.

  • How long is the flight from St. Louis to Barcelona?

    There are many flights that can get you from St. Louis to Barcelona in 13h 10m. Fly via Lufthansa, British Airways, or Air Canada to get the fastest option. The distance between St. Louis and Barcelona is about 4638 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Delta, at $552, was found to be the cheapest airline from St. Louis to Barcelona.Alternate airlines to your destination round-trip include United Airlines and Lufthansa. You may be able to fly from St. Louis to Barcelona for 38% 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 Lufthansa ($450), American Airlines ($468), and United Airlines ($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 $513). Flying from St. Louis to Barcelona in June is currently the most expensive (average of $1,094). 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

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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 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$552Average$1,010FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$567Average$996FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$568Average$930FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$589Average$931FlexibilityNo cancel feeOn-time70%
KLMCheapest$590Average$782FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$624Average$1,226FlexibilityNo cancel feeOn-time67%
IberiaCheapest$631Average$972FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$632Average$1,092FlexibilityNo cancel feeOn-time71%

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