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Cheap flights from St. Louis to Barcelona-El Prat Airport from £340

STL — BCN
22 Nov — 29 Nov1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from St. Louis to Barcelona-El Prat

Enter your travel dates to find the best prices.

Cheapest flights from St. Louis to Barcelona-El Prat

Wed 2/1206:00 -
1 stop19h 20m
Wed 9/1213:35 -
2 stops39h 40m
Deal found 18/10£549
Mon 23/1108:00 -
1 stop18h 00m
Wed 9/1213:35 -
2 stops39h 40m
Deal found 23/10£556
Mon 23/1114:31 -
1 stop11h 09m
Wed 9/1210:50 -
1 stop14h 23m
Deal found 23/10£557
Mon 23/1118:55 -
2 stops34h 45m
Tue 8/1218:45 -
2 stops25h 35m
Deal found 21/10£558
Mon 23/1108:30 -
2 stops17h 30m
Wed 9/1213:35 -
2 stops32h 06m
Deal found 19/10£561
Wed 2/1214:33 -
1 stop11h 07m
Wed 9/1210:50 -
1 stop17h 48m
Deal found 19/10£564
Wed 2/1210:14 -
2 stops15h 21m
Wed 9/1210:35 -
2 stops19h 51m
Deal found 19/10£567
Thu 3/1213:17 -
1 stop12h 43m
Thu 10/1213:35 -
2 stops39h 40m
Deal found 19/10£586
Mon 7/1211:05 -
1 stop14h 15m
Mon 14/1213:50 -
2 stops36h 40m
Deal found 23/10£593

Find flight deals from St. Louis to Barcelona-El Prat

Round-trip from

£549

One-way from

£340

Popular in

June

Cheapest in

April

Average price

£729
United Airlines
  • United Airlines
  • 2/12-9/12
  • 3 total stops
  • 59h 00m total
  • St. Louis to Barcelona
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British Airways
  • British Airways
  • 28/3-31/12
  • 1 total stop
  • 15h 40m total
  • St. Louis to Barcelona
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£141 potential increase over avg. return price).
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Cheapest flight prices on average. 5% potential price decrease (£28 potential savings vs. average return price).
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Average for round-trip flights in October 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from St. Louis to Barcelona-El Prat Airport that are best for you.

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St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Sun 28/3

21:40-20:20

1 stop15h 40m

Barcelona-El Prat

Wed 31/12

00:00-17:00

Nonstop0h 00m

£340

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Mon 12/4

13:27-13:15

1 stop16h 48m

Barcelona-El Prat

Fri 23/4

12:15-12:40

2 stops31h 25m

£566

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Mon 1/3

06:00-09:35

2 stops20h 35m

Barcelona-El Prat

Thu 4/3

13:35-14:17

2 stops31h 42m

£576

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Tue 16/3

13:00-09:00

1 stop14h 00m

Barcelona-El Prat

Tue 23/3

11:00-22:58

1 stop17h 58m

£581

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Wed 10/3

09:40-09:35

2 stops16h 55m

Barcelona-El Prat

Wed 17/3

06:50-21:13

2 stops20h 23m

£588

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Mon 29/3

06:30-15:35

3 stops26h 05m

Barcelona-El Prat

Wed 31/12

00:00-17:00

Nonstop0h 00m

£599

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Mon 7/12

11:05-08:20

1 stop14h 15m

Barcelona-El Prat

Mon 14/12

10:30-19:30

1 stop16h 00m

£608

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Fri 13/11

18:50-13:15

1 stop11h 25m

Barcelona-El Prat

Thu 19/11

15:10-21:40

1 stop13h 30m

£646

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Thu 11/3

08:58-08:20

1 stop16h 22m

Barcelona-El Prat

Wed 17/3

11:00-19:30

1 stop14h 30m

£697

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Sat 13/3

06:30-08:20

1 stop18h 50m

Barcelona-El Prat

Sat 20/3

12:15-15:26

1 stop33h 11m

£733

Flights are sorted by cheapest return flights first.

Deals found on 23/10

Showing 1-10 of 14 resultsSorted by cheapest first
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Best time to book a flight from St. Louis to Barcelona-El Prat

Have a flexible travel schedule? Discover the best time to fly to Barcelona-El Prat from St. Louis with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Barcelona-El Prat Airport

How far ahead should I book a flight from St. Louis to Barcelona-El Prat Airport?

The price you pay for your flight from St. Louis to Barcelona-El Prat Airport may vary depending on when you book. For the best chance of a lower fare, look to book 23 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from St. Louis to Barcelona-El Prat Airport?

Currently, April is the cheapest month in which you can book a flight from St. Louis to Barcelona-El Prat Airport (average of £473). Flying from St. Louis to Barcelona-El Prat Airport in June is currently the most expensive (average of £1,127). 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.

How much does it cost for a return flight from St. Louis to Barcelona-El Prat Airport?

Airfare is typical for this route at the moment.

St. Louis to Barcelona-El Prat Airport flights typically cost between £539 and £674 in December.
The cheapest return price found within the last 5 days was £549 on United Airlines (2 Dec–9 Dec).

Related info for your journey

  • What airport do you fly from for flights from St. Louis to Barcelona-El Prat?

    For a flight from St. Louis to Barcelona-El Prat, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city. Lambert-St Louis is the only St. Louis airport and it handles 0 outbound flights to Barcelona-El Prat per day. 0 airlines have flights to Barcelona-El Prat from Lambert-St Louis on a regular basis.

  • How long is the flight from St. Louis to Barcelona-El Prat Airport?

    For as low as £549, United Airlines can have you in Barcelona-El Prat Airport from St. Louis in 19h 20m. St. Louis and Barcelona-El Prat Airport are separated by a distance of 4638 mi.

  • Can I find deals for flights from St. Louis to Barcelona-El Prat that include hotel bookings?

    Yes. In addition to deals on St. Louis to Barcelona-El Prat flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Barcelona-El Prat?

    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-El Prat.

  • Can I find deals for business class flights from St. Louis to Barcelona-El Prat?

    Yes. Cheapflights offers flight deals from St. Louis to Barcelona-El Prat 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-El Prat Airport?

    Currently, April is the cheapest month in which you can book a flight from St. Louis to Barcelona-El Prat Airport (average of £473). Flying from St. Louis to Barcelona-El Prat Airport in June is currently the most expensive (average of £1,127). 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

Travelling to a place near Barcelona-El Prat Airport?

Book flights to Barcelona-El Prat Airport if you plan to visit one of these locations
L'Hospitalet de Llobregat
Castelldefels
Badalona
Santa Susanna
Tossa de Mar
Palafrugell
Cambrils
Empuriabrava
El Prat de Llobregat
Cadaques
Calella
L'Estartit
Pineda de Mar
La Pineda
Malgrat de Mar

Browse thousands of different options on Cheapflights for your next trip

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When you search for this flight from St. Louis to Barcelona-El Prat, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Barcelona-El Prat from St. Louis today and book when prices fit your budget.

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