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Cheap flights from St. Louis to Barcelona-El Prat Airport from £276

STL — BCN
11 Oct — 18 Oct1
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

Mon 12/1006:00 -
1 stop24h 15m
Wed 21/1013:15 -
1 stop31h 45m
Deal found 11/9£415
Sun 20/912:10 -
1 stop12h 50m
Wed 30/912:15 -
1 stop13h 26m
Deal found 10/9£419
Mon 28/912:00 -
1 stop17h 50m
Thu 8/1011:00 -
1 stop17h 23m
Deal found 10/9£425
Mon 21/917:30 -
2 stops32h 50m
Wed 30/913:15 -
1 stop14h 05m
Deal found 10/9£426
Mon 28/907:05 -
2 stops18h 30m
Wed 7/1015:15 -
2 stops25h 34m
Deal found 10/9£429
Sun 20/906:00 -
1 stop23h 50m
Thu 1/1015:15 -
2 stops23h 51m
Deal found 10/9£432
Sun 27/914:30 -
2 stops19h 40m
Thu 8/1011:00 -
1 stop17h 23m
Deal found 10/9£439
Wed 23/918:45 -
2 stops17h 05m
Thu 1/1011:00 -
1 stop13h 45m
Deal found 10/9£448
Mon 21/907:05 -
2 stops18h 30m
Thu 1/1013:25 -
2 stops17h 17m
Deal found 10/9£448
Mon 28/909:30 -
1 stop16h 30m
Mon 5/1013:50 -
1 stop30h 35m
Deal found 10/9£454
Thu 24/912:10 -
1 stop12h 50m
Wed 30/912:15 -
1 stop13h 26m
Deal found 10/9£456
Mon 28/916:50 -
2 stops32h 10m
Mon 5/1013:50 -
1 stop30h 35m
Deal found 10/9£457

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

Round-trip from

£414

One-way from

£276

Popular in

June

Cheapest in

January

Average price

£655
United Airlines
  • United Airlines
  • 3/2-12/2
  • 3 total stops
  • 47h 40m total
  • St. Louis to Barcelona
Search Deals
United Airlines
  • United Airlines
  • 9/1-31/12
  • 1 total stop
  • 32h 00m total
  • St. Louis to Barcelona
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£134 potential increase over avg. return price).
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Cheapest flight prices on average. 6% potential price decrease (£28 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 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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Route

Depart

Return

Price

Cheapest return flight

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Sat 9/1

17:20-08:20

1 stop32h 00m

Barcelona-El Prat

Wed 31/12

00:00-17:00

Nonstop0h 00m

£276

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Fri 26/2

06:30-08:20

1 stop18h 50m

Barcelona-El Prat

Wed 31/12

00:00-17:00

Nonstop0h 00m

£304

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Fri 1/1

06:04-09:35

3 stops20h 31m

Barcelona-El Prat

Wed 31/12

00:00-17:00

Nonstop0h 00m

£307

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Sat 31/10

17:34-09:35

2 stops34h 01m

Barcelona-El Prat

Wed 31/12

00:00-17:00

Nonstop0h 00m

£345

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Wed 28/10

10:35-11:10

2 stops18h 35m

Barcelona-El Prat

Wed 31/12

00:00-17:00

Nonstop0h 00m

£346

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Sat 17/10

16:50-09:00

1 stop33h 10m

Barcelona-El Prat

Wed 31/12

00:00-17:00

Nonstop0h 00m

£352
Fastest return journey

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Thu 12/11

08:00-09:00

1 stop18h 00m

Barcelona-El Prat

Wed 31/12

00:00-17:00

Nonstop0h 00m

£375

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Thu 3/12

07:03-08:40

1 stop18h 37m

Barcelona-El Prat

Wed 31/12

00:00-17:00

Nonstop0h 00m

£428

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Sat 26/9

12:10-08:00

1 stop12h 50m

Barcelona-El Prat

Wed 7/10

15:15-21:21

1 stop13h 06m

£473

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Mon 2/11

10:53-13:15

1 stop19h 22m

Barcelona-El Prat

Mon 9/11

13:50-23:24

2 stops16h 34m

£477

Flights are sorted by cheapest return flights first.

Deals found on 8/9

Showing 1-10 of 18 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, January is the cheapest month in which you can book a flight from St. Louis to Barcelona-El Prat Airport (average of £412). Flying from St. Louis to Barcelona-El Prat Airport in June is currently the most expensive (average of £1,079). 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 below average for this route at the moment.

St. Louis to Barcelona-El Prat Airport flights typically cost between £554 and £780 in February.
The cheapest return price found within the last 5 days was £414 on United Airlines (3 Feb–12 Feb).

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 £429, Delta can have you in Barcelona-El Prat Airport from St. Louis in 15h 30m. St. Louis and Barcelona-El Prat Airport are separated by a distance of 4638 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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, January is the cheapest month in which you can book a flight from St. Louis to Barcelona-El Prat Airport (average of £412). Flying from St. Louis to Barcelona-El Prat Airport in June is currently the most expensive (average of £1,079). 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
El Prat de Llobregat
Badalona
Cambrils
Palafrugell
Calella
Santa Susanna
Tossa de Mar
Empuriabrava
Pineda de Mar
Cadaques
L'Estartit
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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