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Cheap flights from St. Louis to Barcelona from $303

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Barcelona departing on 7/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from St. Louis to Barcelona

Cheap round-trip flights

Enter your travel dates to find the best prices.
Iberia Logo
9:35 pm - 6:40 pm
STL
-
BCN
14h 05m
1 stop
Iberia Logo
7:30 am - 7:30 pm
BCN
-
STL
19h 00m
1 stop
$757Iberia
Tue, Oct 13 - Wed, Oct 21
American Airlines Logo
2:50 pm - 12:30 pm
STL
-
BCN
14h 40m
2 stops
American Airlines Logo
11:00 am - 10:32 pm
BCN
-
STL
18h 32m
1 stop
$770American Airlines
Sun, Nov 8 - Thu, Nov 19
British Airways Logo
5:18 pm - 3:40 pm
STL
-
BCN
15h 22m
2 stops
British Airways Logo
12:50 pm - 11:41 pm
BCN
-
STL
17h 51m
1 stop
$771British Airways
Tue, Sep 22 - Wed, Oct 7
Iberia Logo
12:43 pm - 10:10 am
STL
-
BCN
14h 27m
1 stop
Iberia Logo
12:50 pm - 11:41 pm
BCN
-
STL
17h 51m
1 stop
$773Iberia
Tue, Sep 22 - Wed, Oct 7
Iberia Logo
9:35 pm - 10:40 pm
STL
-
BCN
18h 05m
1 stop
Iberia Logo
1:35 pm - 11:41 pm
BCN
-
STL
17h 06m
2 stops
$776Iberia
Tue, Oct 13 - Wed, Oct 21
British Airways Logo
8:05 pm - 5:35 pm
STL
-
BCN
14h 30m
2 stops
British Airways Logo
8:50 am - 8:08 pm
BCN
-
STL
17h 18m
2 stops
$781British Airways
Mon, Oct 19 - Fri, Oct 30
American Airlines Logo
2:17 pm - 11:45 am
STL
-
BCN
14h 28m
2 stops
American Airlines Logo
11:00 am - 10:32 pm
BCN
-
STL
18h 32m
1 stop
$783American Airlines
Sun, Nov 1 - Wed, Nov 11
Iberia Logo
12:43 pm - 10:10 am
STL
-
BCN
14h 27m
1 stop
Iberia Logo
7:00 am - 8:08 pm
BCN
-
STL
19h 08m
2 stops
$784Iberia
Mon, Oct 19 - Fri, Oct 30
Air Canada Logo
8:00 am - 8:00 am
STL
-
BCN
17h 00m
2 stops
Air Canada Logo
12:15 pm - 3:43 pm
BCN
-
STL
34h 28m
2 stops
$786Air Canada
Tue, Oct 13 - Wed, Oct 21
British Airways Logo
9:35 pm - 10:40 pm
STL
-
BCN
18h 05m
1 stop
British Airways Logo
11:50 am - 7:30 pm
BCN
-
STL
14h 40m
1 stop
$789British Airways
Wed, Aug 19 - Tue, Oct 20

American Airlines flights from St. Louis to Barcelona-El Prat Airport

Our best American Airlines deals on St. Louis to Barcelona-El Prat Airport flight tickets
American Airlines
Nov 8
STL2:50 pmLambert-St Louis
14h 40m
2 stops
BCN12:30 pmBarcelona-El Prat
Nov 19
BCN11:00 amBarcelona-El Prat
18h 32m
1 stop
STL10:32 pmLambert-St Louis
$770
American Airlines
Nov 1
STL2:17 pmLambert-St Louis
14h 28m
2 stops
BCN11:45 amBarcelona-El Prat
Nov 11
BCN11:00 amBarcelona-El Prat
18h 32m
1 stop
STL10:32 pmLambert-St Louis
$783
American Airlines
Nov 1
STL2:17 pmLambert-St Louis
14h 28m
2 stops
BCN11:45 amBarcelona-El Prat
Nov 11
BCN9:15 amBarcelona-El Prat
17h 12m
2 stops
STL7:27 pmLambert-St Louis
$793

Air Canada flights from St. Louis to Barcelona-El Prat Airport

Our best Air Canada deals on St. Louis to Barcelona-El Prat Airport flight tickets
Air Canada
Sep 22
STL8:00 amLambert-St Louis
17h 00m
2 stops
BCN8:00 amBarcelona-El Prat
Oct 7
BCN1:15 pmBarcelona-El Prat
33h 28m
2 stops
STL3:43 pmLambert-St Louis
$791
Air Canada
Aug 19
STL12:10 pmLambert-St Louis
12h 50m
1 stop
BCN8:00 amBarcelona-El Prat
Oct 20
BCN6:40 amBarcelona-El Prat
19h 01m
2 stops
STL6:41 pmLambert-St Louis
$799
Air Canada
Aug 19
STL8:55 amLambert-St Louis
16h 05m
2 stops
BCN8:00 amBarcelona-El Prat
Oct 20
BCN9:05 amBarcelona-El Prat
17h 55m
2 stops
STL8:00 pmLambert-St Louis
$813

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Barcelona-El Prat Airport 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, momondo users made 832,500 searches. Data last updated June 6, 2026.
Use the filters below to find and compare flights from St. Louis to Barcelona-El Prat Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 10/13

9:35 pm-6:40 pm

1 stop14h 05m

Barcelona-El Prat

Wed 10/21

7:30 am-7:30 pm

1 stop19h 00m

$757

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 11/8

2:50 pm-12:30 pm

2 stops14h 40m

Barcelona-El Prat

Thu 11/19

11:00 am-10:32 pm

1 stop18h 32m

$770

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 9/22

5:18 pm-3:40 pm

2 stops15h 22m

Barcelona-El Prat

Wed 10/7

12:50 pm-11:41 pm

1 stop17h 51m

$771

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 9/22

12:43 pm-10:10 am

1 stop14h 27m

Barcelona-El Prat

Wed 10/7

12:50 pm-11:41 pm

1 stop17h 51m

$773

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 10/13

9:35 pm-10:40 pm

1 stop18h 05m

Barcelona-El Prat

Wed 10/21

1:35 pm-11:41 pm

2 stops17h 06m

$776
Quickest round-trip

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 10/19

8:05 pm-5:35 pm

2 stops14h 30m

Barcelona-El Prat

Fri 10/30

8:50 am-8:08 pm

2 stops17h 18m

$781

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 11/1

2:17 pm-11:45 am

2 stops14h 28m

Barcelona-El Prat

Wed 11/11

11:00 am-10:32 pm

1 stop18h 32m

$783

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 10/19

12:43 pm-10:10 am

1 stop14h 27m

Barcelona-El Prat

Fri 10/30

7:00 am-8:08 pm

2 stops19h 08m

$784

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 10/13

8:00 am-8:00 am

2 stops17h 00m

Barcelona-El Prat

Wed 10/21

12:15 pm-3:43 pm

2 stops34h 28m

$786

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 8/19

9:35 pm-10:40 pm

1 stop18h 05m

Barcelona-El Prat

Tue 10/20

11:50 am-7:30 pm

1 stop14h 40m

$789

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Barcelona from

How to get the cheapest flight ticket from St. Louis to Barcelona-El Prat Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between St. Louis and Barcelona-El Prat Airport?

What is the cheapest month to fly to Barcelona-El Prat Airport?

The cheapest month to fly to Barcelona-El Prat Airport from St. Louis is in January. Flight prices, which tend to average around $531, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Barcelona-El Prat Airport from St. Louis during April instead. Flights to Barcelona-El Prat Airport in April, while not as cheap as those in January, still average around $634.

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

You are more likely to see cheaper flights to Barcelona-El Prat Airport from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Barcelona-El Prat Airport for around $837 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Barcelona-El Prat Airport from St. Louis for as low as $581 on momondo.

Can stopping save me money on St. Louis to Barcelona-El Prat Airport flights?

You could potentially save up to 29% on your flight if you consider stops on a St. Louis to Barcelona-El Prat Airport flight.

How have St. Louis to Barcelona-El Prat Airport flight prices changed over time?

As of June 2026, prices for St. Louis to Barcelona-El Prat Airport flights are approximately 11% cheaper when compared to flights at the same time last year.

When to book flights from St. Louis to Barcelona-El Prat Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Barcelona-El Prat Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Barcelona-El Prat Airport (STL to BCN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Barcelona-El Prat Airport

Fastest flight time

11h 25m

Direct flights

None
The fastest flight from St. Louis to Barcelona-El Prat Airport takes 11h 25m
There are no direct flights from St. Louis to Barcelona-El Prat Airport. There are no popular flight routes from St. Louis to Barcelona-El Prat Airport.
Search flight deals

Frequently asked questions about flying from St. Louis to Barcelona-El Prat Airport

  • How far is Lambert-St Louis to Barcelona-El Prat by plane?

    There are 4635.1 mi between Lambert-St Louis and Barcelona-El Prat. Flights usually cover this in 11h 25m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Barcelona-El Prat Airport?

    Prices for flights from Lambert-St Louis Airport to Barcelona-El Prat Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Barcelona-El Prat Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Barcelona-El Prat Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Barcelona-El Prat Airport.

  • What documentation or ID do you need to fly to Barcelona-El Prat Airport?

    The travel and health documents required for your trip to Barcelona-El Prat Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Barcelona-El Prat Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from St. Louis to Barcelona-El Prat Airport?

Best airlines flying from St. Louis to Barcelona-El Prat Airport

Compare and see reviews for airlines that fly from St. Louis to Barcelona-El Prat Airport with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom $510Free CancellationRating
6.8
8,039 reviews
Search Lufthansa flights
British AirwaysPriceFrom $540Free CancellationRating
6.7
8,028 reviews
Search British Airways flights
DeltaPriceFrom $552Free CancellationRating
7.8
8,398 reviews
Search Delta flights
Air CanadaPriceFrom $560Free CancellationRating
7.1
11,133 reviews
Search Air Canada flights
United AirlinesPriceFrom $567Free CancellationRating
7.4
9,779 reviews
Search United Airlines flights
American AirlinesPriceFrom $607Free CancellationRating
7.1
11,655 reviews
Search American Airlines flights
IberiaPriceFrom $631Free CancellationRating
7.0
3,226 reviews
Search Iberia flights

Traveling to a place near Barcelona?

Book flights to Barcelona if you plan to visit one of these locations
Lloret de Mar
Salou
Sitges
Tossa de Mar
Castelldefels
Tarragona
El Prat de Llobregat
L'Hospitalet de Llobregat
Calella
Cambrils
Cadaques
Badalona
Santa Susanna
Empuriabrava
Pineda de Mar
Calella de Palafrugell
Pals
Palafrugell
Roses
Malgrat de Mar

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Barcelona?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Barcelona. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to Barcelona with flexible booking policies on momondo?

Flights from St. Louis to Barcelona with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Barcelona?

Once all potential St. Louis to Barcelona flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Barcelona right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of St. Louis to Barcelona flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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