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Cheap flights from St. Louis to Barcelona from $274

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 10/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Barcelona (STL-BCN)

Cheap round-trip flights

United Airlines Logo
1:30 pm - 7:50 amSTL-BCN
11h 20m1 stop
United Airlines Logo
3:05 pm - 3:46 pmBCN-STL
30h 41m1 stop
$541United Airlines
Find Deal
Mon, Oct 13 - Wed, Oct 29
Logo
9:15 am - 7:50 amSTL-BCN
15h 35m2 stops
Logo
6:50 am - 2:55 pmBCN-STL
14h 05m1 stop
$554
Find Deal
Mon, Oct 13 - Wed, Oct 29
British Airways Logo
1:53 pm - 10:30 amSTL-BCN
13h 37m1 stop
British Airways Logo
10:45 am - 8:26 pmBCN-STL
16h 41m1 stop
$573British Airways
Find Deal
Sun, Sep 28 - Tue, Oct 14
Iberia Logo
10:45 am - 9:00 amSTL-BCN
15h 15m1 stop
Iberia Logo
12:30 pm - 8:55 pmBCN-STL
15h 25m1 stop
$574Iberia
Find Deal
Sun, Nov 16 - Tue, Nov 25
Air Canada Logo
9:15 am - 7:50 amSTL-BCN
15h 35m2 stops
Air Canada Logo
12:10 pm - 3:44 pmBCN-STL
34h 34m2 stops
$581Air Canada
Find Deal
Sun, Sep 28 - Tue, Oct 14
Iberia Logo
1:03 pm - 9:05 amSTL-BCN
13h 02m1 stop
Iberia Logo
10:45 am - 8:26 pmBCN-STL
16h 41m1 stop
$582Iberia
Find Deal
Wed, Oct 1 - Fri, Oct 10
American Airlines Logo
9:35 am - 12:15 pmSTL-BCN
19h 40m1 stop
American Airlines Logo
1:30 pm - 11:56 pmBCN-STL
17h 26m1 stop
$583American Airlines
Find Deal
Tue, Oct 7 - Tue, Oct 14
British Airways Logo
6:00 am - 10:30 amSTL-BCN
21h 30m1 stop
British Airways Logo
10:45 am - 7:09 pmBCN-STL
15h 24m1 stop
$584British Airways
Find Deal
Mon, Oct 13 - Thu, Oct 23
American Airlines Logo
10:54 am - 9:05 amSTL-BCN
15h 11m2 stops
American Airlines Logo
1:30 pm - 11:56 pmBCN-STL
17h 26m1 stop
$587American Airlines
Find Deal
Wed, Oct 1 - Fri, Oct 10
Air Canada Logo
1:30 pm - 7:50 amSTL-BCN
11h 20m1 stop
Air Canada Logo
12:10 pm - 7:57 pmBCN-STL
14h 47m1 stop
$588Air Canada
Find Deal
Sun, Sep 28 - Wed, Oct 8

British Airways flights from St. Louis to Barcelona-El Prat Airport

Our best British Airways deals on St. Louis to Barcelona-El Prat Airport flight tickets
British Airways
Sep 28
STL1:53 pmLambert-St Louis
13h 37m
1 stop
BCN10:30 amBarcelona-El Prat
Oct 14
BCN10:45 amBarcelona-El Prat
16h 41m
1 stop
STL8:26 pmLambert-St Louis
$573
Find similar
British Airways
Oct 13
STL6:00 amLambert-St Louis
21h 30m
1 stop
BCN10:30 amBarcelona-El Prat
Oct 23
BCN10:45 amBarcelona-El Prat
15h 24m
1 stop
STL7:09 pmLambert-St Louis
$584
Find similar
British Airways
Dec 8
STL10:47 amLambert-St Louis
15h 13m
1 stop
BCN9:00 amBarcelona-El Prat
Dec 22
BCN9:00 pmBarcelona-El Prat
51h 10m
2 stops
STL5:10 pmLambert-St Louis
$613
Find similar

Iberia flights from St. Louis to Barcelona-El Prat Airport

Our best Iberia deals on St. Louis to Barcelona-El Prat Airport flight tickets
Iberia
Nov 16
STL10:45 amLambert-St Louis
15h 15m
1 stop
BCN9:00 amBarcelona-El Prat
Nov 25
BCN12:30 pmBarcelona-El Prat
15h 25m
1 stop
STL8:55 pmLambert-St Louis
$574
Find similar
Iberia
Oct 1
STL1:03 pmLambert-St Louis
13h 02m
1 stop
BCN9:05 amBarcelona-El Prat
Oct 10
BCN10:45 amBarcelona-El Prat
16h 41m
1 stop
STL8:26 pmLambert-St Louis
$582
Find similar
Iberia
Nov 16
STL2:17 pmLambert-St Louis
14h 28m
2 stops
BCN11:45 amBarcelona-El Prat
Nov 26
BCN12:30 pmBarcelona-El Prat
15h 25m
1 stop
STL8:55 pmLambert-St Louis
$590
Find similar

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 August 28, 2025.
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

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 10/13

1:30 pm-7:50 am

1 stop11h 20m

Barcelona-El Prat

Wed 10/29

3:05 pm-3:46 pm

1 stop30h 41m

$541

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 10/13

9:15 am-7:50 am

2 stops15h 35m

Barcelona-El Prat

Wed 10/29

6:50 am-2:55 pm

1 stop14h 05m

$554

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/28

1:53 pm-10:30 am

1 stop13h 37m

Barcelona-El Prat

Tue 10/14

10:45 am-8:26 pm

1 stop16h 41m

$573

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 11/16

10:45 am-9:00 am

1 stop15h 15m

Barcelona-El Prat

Tue 11/25

12:30 pm-8:55 pm

1 stop15h 25m

$574

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/28

9:15 am-7:50 am

2 stops15h 35m

Barcelona-El Prat

Tue 10/14

12:10 pm-3:44 pm

2 stops34h 34m

$581

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 10/1

1:03 pm-9:05 am

1 stop13h 02m

Barcelona-El Prat

Fri 10/10

10:45 am-8:26 pm

1 stop16h 41m

$582

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 10/7

9:35 am-12:15 pm

1 stop19h 40m

Barcelona-El Prat

Tue 10/14

1:30 pm-11:56 pm

1 stop17h 26m

$583

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 10/13

6:00 am-10:30 am

1 stop21h 30m

Barcelona-El Prat

Thu 10/23

10:45 am-7:09 pm

1 stop15h 24m

$584

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 10/1

10:54 am-9:05 am

2 stops15h 11m

Barcelona-El Prat

Fri 10/10

1:30 pm-11:56 pm

1 stop17h 26m

$587

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/28

1:30 pm-7:50 am

1 stop11h 20m

Barcelona-El Prat

Wed 10/8

12:10 pm-7:57 pm

1 stop14h 47m

$588

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 cheapest month to fly to Barcelona-El Prat Airport?

The cheapest month to fly to Barcelona-El Prat Airport from St. Louis is in February. Flight prices, which tend to average around $684, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Barcelona-El Prat Airport from St. Louis during November instead. Flights to Barcelona-El Prat Airport in November, while not as cheap as those in February, still average around $755.

What is the cheapest day to depart on your flight to Barcelona-El Prat Airport?

The cheapest day to depart on your flight to Barcelona-El Prat Airport is on a Tuesday when prices can be found for as low as $867. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around $1,135. These prices are subject to change though, so be sure to set up a Price Alert for flights to Barcelona-El Prat Airport.

What is the cheapest time of day to depart on your flight to Barcelona-El Prat Airport?

Flying to Barcelona-El Prat Airport from St. Louis in the morning is the least expensive time of day to depart. momondo users have found prices as low as $905 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,043 on average. Flights to Barcelona-El Prat Airport from St. Louis in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight 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 $960 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 $736 on momondo.

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

You could potentially save up to 6% 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 August 2025, prices for St. Louis to Barcelona-El Prat Airport flights are approximately 17% 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

Direct flights

None
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.
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  • 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 20m, 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
United AirlinesPriceFrom $573Free CancellationRating
7.4
8,944 reviews
Search United Airlines flights
KLMPriceFrom $590Free CancellationRating
7.8
1,382 reviews
Search KLM flights
British AirwaysPriceFrom $602Free CancellationRating
6.7
7,316 reviews
Search British Airways flights
DeltaPriceFrom $602Free CancellationRating
7.9
7,977 reviews
Search Delta flights
LufthansaPriceFrom $614Free CancellationRating
6.8
7,368 reviews
Search Lufthansa flights
Air CanadaPriceFrom $629Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
IberiaPriceFrom $631Free CancellationRating
7.0
2,892 reviews
Search Iberia flights
American AirlinesPriceFrom $648Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Traveling to a place near Barcelona?

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

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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