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$386+ 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 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BCN
nov. 29 — dic. 61
sáb. 11/29
sáb. 12/6
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 85 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 octubre 30, 2025.

Round-trip from

$433
(Kiwi.com)

One-way from

$386
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$745
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. 23% potential increase in price ($290 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in October 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 octubre 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/106:43 pmSTL - BCN
2 stops16h 02mLufthansa
mié. 11/266:50 amBCN - STL
1 stop14h 05mLufthansa
Deal found 10/29$433
This Flighttix deal was found by Cheapflights users on 10/30. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/287:05 amSTL - BCN
1 stop18h 35mVirgin Atlantic
jue. 12/1110:15 amBCN - STL
2 stops20h 27mVirgin Atlantic
Deal found 10/30$440
This Delta deal was found by Cheapflights users on 10/30. 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.
mié. 11/265:17 pmSTL - BCN
2 stops16h 48mDelta
jue. 12/410:55 amBCN - STL
1 stop17h 07mDelta
Deal found 10/30$453
This Flighttix deal was found by Cheapflights users on 10/30. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/2810:00 amSTL - BCN
2 stops16h 35mAir Canada
jue. 12/111:35 pmBCN - STL
2 stops29h 40mAir Canada
Deal found 10/30$460
This United Airlines deal was found by Cheapflights users on 10/30. 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.
jue. 11/2710:00 amSTL - BCN
1 stop20h 10mUnited Airlines
jue. 12/111:35 pmBCN - STL
2 stops31h 48mUnited Airlines
Deal found 10/30$461
This Delta deal was found by Cheapflights users on 10/30. 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.
mié. 11/1911:39 amSTL - BCN
2 stops15h 46mDelta
jue. 12/410:55 amBCN - STL
1 stop14h 01mDelta
Deal found 10/30$466
This United Airlines deal was found by Cheapflights users on 10/30. 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.
lun. 11/36:43 pmSTL - BCN
1 stop11h 27mUnited Airlines
mié. 11/196:50 amBCN - STL
1 stop14h 05mUnited Airlines
Deal found 10/30$471
This Finnair deal was found by Cheapflights users on 10/30. 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.
lun. 11/36:00 amSTL - BCN
1 stop20h 00mMultiple Airlines
mié. 11/1912:30 pmBCN - STL
2 stops17h 37mMultiple Airlines
Deal found 10/30$474
This United Airlines deal was found by Cheapflights users on 10/28. 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.
lun. 11/103:14 pmSTL - BCN
1 stop14h 56mUnited Airlines
mié. 11/266:50 amBCN - STL
1 stop14h 05mUnited Airlines
Deal found 10/28$476

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 octubre 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

mié. 11/19

11:39 am-10:25 am

2 stops15h 46m

Barcelona-El Prat

jue. 12/4

10:55 am-5:56 pm

1 stop14h 01m

$466

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

lun. 11/3

6:43 pm-1:10 pm

1 stop11h 27m

Barcelona-El Prat

mié. 11/19

6:50 am-1:55 pm

1 stop14h 05m

$471

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

mié. 11/26

6:30 am-9:35 am

2 stops20h 05m

Barcelona-El Prat

jue. 12/4

1:35 pm-3:29 pm

2 stops32h 54m

$476

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

mié. 11/26

5:17 pm-5:05 pm

2 stops16h 48m

Barcelona-El Prat

jue. 12/4

6:00 am-5:10 pm

2 stops18h 10m

$480

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

mié. 11/19

11:51 am-11:10 am

2 stops16h 19m

Barcelona-El Prat

jue. 12/4

12:30 pm-8:21 pm

1 stop14h 51m

$481

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

mar. 1/6

6:40 pm-5:45 pm

2 stops40h 05m

Barcelona-El Prat

mar. 1/13

1:35 pm-5:43 pm

2 stops35h 08m

$481

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

mar. 1/6

2:54 pm-1:40 pm

2 stops15h 46m

Barcelona-El Prat

mar. 1/13

10:40 am-7:29 pm

1 stop15h 49m

$481

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

dom. 11/23

6:43 pm-9:35 am

2 stops31h 52m

Barcelona-El Prat

mar. 12/2

6:50 am-3:29 pm

2 stops39h 39m

$482

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

lun. 11/24

10:00 am-9:35 am

2 stops16h 35m

Barcelona-El Prat

mar. 12/2

1:50 pm-3:29 pm

2 stops32h 39m

$482

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

dom. 11/9

6:43 pm-5:45 pm

2 stops16h 02m

$386

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 18 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 October 24, 2025.

To ensure you get the cheapest price possible for a flight from St. Louis to Barcelona, you should look to book at least 85 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, November is the cheapest month in which you can book a flight from St. Louis to Barcelona (average of $529). Flying from St. Louis to Barcelona in June is currently the most expensive (average of $1,095). 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 octubre 30, 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 octubre 30, 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
8,998 reviews

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
8,998 reviews
United Airlines
7.4
Good
8,998 reviews

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
American Airlines
7.2
Good
11,034 reviews
United Airlines
7.4
Good
8,998 reviews

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Air Canada
7.1
Good
10,381 reviews
United Airlines
7.4
Good
8,998 reviews

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Iberia
7.0
Good
3,004 reviews
United Airlines
7.4
Good
8,998 reviews

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
British Airways
6.7
Okay
7,487 reviews
United Airlines
7.4
Good
8,998 reviews

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 11h 27m. Fly via Delta, United Airlines, 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 KLM. You may be able to fly from St. Louis to Barcelona for 40% less than the average price by searching for these airlines.

  • 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, November is the cheapest month in which you can book a flight from St. Louis to Barcelona (average of $529). Flying from St. Louis to Barcelona in June is currently the most expensive (average of $1,095). 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 octubre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$552Average$1,025FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$578Average$1,018FlexibilityNo cancel feeOn-time69%
KLMCheapest$590Average$745FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$602Average$893FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$614Average$931FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$624Average$1,238FlexibilityNo cancel feeOn-time67%
IberiaCheapest$631Average$1,002FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$648Average$1,128FlexibilityNo cancel feeOn-time71%

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