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Cheap flights from St. Louis to Barcelona from $292

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 3/19. 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

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
11:22 am - 12:00 pm
STL
-
BCN
17h 38m2 stops
Lufthansa Logo
6:50 am - 1:55 pm
BCN
-
STL
14h 05m1 stop
$435Lufthansa
Wed, Jan 14 - Sun, Jan 25
Lufthansa Logo
1:15 pm - 1:10 pm
STL
-
BCN
16h 55m2 stops
Lufthansa Logo
11:00 am - 11:59 pm
BCN
-
STL
19h 59m1 stop
$437Lufthansa
Sat, Jan 24 - Sat, Jan 31
Lufthansa Logo
3:50 pm - 12:00 pm
STL
-
BCN
13h 10m1 stop
Lufthansa Logo
6:50 am - 1:55 pm
BCN
-
STL
14h 05m1 stop
$450Lufthansa
Wed, Jan 14 - Sun, Jan 25
Air Canada Logo
4:05 pm - 9:35 am
STL
-
BCN
34h 30m2 stops
Air Canada Logo
1:35 pm - 9:00 pm
BCN
-
STL
38h 25m2 stops
$470Air Canada
Sun, Feb 1 - Tue, Feb 17
British Airways Logo
5:04 pm - 6:25 pm
STL
-
BCN
18h 21m2 stops
British Airways Logo
10:40 am - 7:29 pm
BCN
-
STL
15h 49m1 stop
$472British Airways
Thu, Jan 15 - Sun, Feb 1
British Airways Logo
1:33 pm - 4:05 pm
STL
-
BCN
19h 32m2 stops
British Airways Logo
8:40 pm - 5:13 pm
BCN
-
STL
26h 33m2 stops
$482British Airways
Sat, Mar 7 - Sat, Mar 14
American Airlines Logo
12:11 pm - 11:55 am
STL
-
BCN
16h 44m1 stop
American Airlines Logo
10:40 am - 7:29 pm
BCN
-
STL
15h 49m1 stop
$484American Airlines
Thu, Jan 15 - Sun, Feb 1
American Airlines Logo
12:01 pm - 9:00 am
STL
-
BCN
13h 59m2 stops
American Airlines Logo
11:00 am - 10:05 pm
BCN
-
STL
18h 05m1 stop
$488American Airlines
Sun, Feb 1 - Tue, Feb 17
Air Canada Logo
4:05 pm - 9:35 am
STL
-
BCN
34h 30m2 stops
Air Canada Logo
6:50 am - 3:29 pm
BCN
-
STL
39h 39m2 stops
$490Air Canada
Sun, Feb 1 - Tue, Feb 17
United Airlines Logo
8:05 am - 9:35 am
STL
-
BCN
18h 30m2 stops
United Airlines Logo
6:50 am - 10:58 pm
BCN
-
STL
23h 08m2 stops
$491United Airlines
Wed, Jan 28 - Sun, Feb 1

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

Our best Lufthansa deals on St. Louis to Barcelona-El Prat Airport flight tickets
Lufthansa
Jan 24
STL1:15 pmLambert-St Louis
16h 55m
2 stops
BCN1:10 pmBarcelona-El Prat
Jan 31
BCN11:00 amBarcelona-El Prat
19h 59m
1 stop
STL11:59 pmLambert-St Louis
$437
Find similar
Lufthansa
Dec 18
STL12:44 pmLambert-St Louis
13h 16m
1 stop
BCN9:00 amBarcelona-El Prat
Dec 26
BCN5:50 amBarcelona-El Prat
15h 05m
1 stop
STL1:55 pmLambert-St Louis
$1,494
Find similar
Lufthansa
Dec 18
STL12:44 pmLambert-St Louis
13h 16m
1 stop
BCN9:00 amBarcelona-El Prat
Dec 25
BCN11:00 amBarcelona-El Prat
19h 43m
1 stop
STL11:43 pmLambert-St Louis
$1,511
Find similar

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

Our best United Airlines deals on St. Louis to Barcelona-El Prat Airport flight tickets
United Airlines
Jan 24
STL4:49 pmLambert-St Louis
17h 46m
2 stops
BCN5:35 pmBarcelona-El Prat
Jan 31
BCN1:35 pmBarcelona-El Prat
31h 55m
2 stops
STL2:30 pmLambert-St Louis
$472
Find similar
United Airlines
Mar 7
STL11:25 amLambert-St Louis
15h 10m
2 stops
BCN9:35 amBarcelona-El Prat
Mar 14
BCN6:50 amBarcelona-El Prat
18h 29m
2 stops
STL7:19 pmLambert-St Louis
$491
Find similar
United Airlines
Jan 28
STL6:30 amLambert-St Louis
20h 05m
2 stops
BCN9:35 amBarcelona-El Prat
Feb 1
BCN6:50 amBarcelona-El Prat
23h 08m
2 stops
STL10:58 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 December 11, 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

Wed 1/14

11:22 am-12:00 pm

2 stops17h 38m

Barcelona-El Prat

Sun 1/25

6:50 am-1:55 pm

1 stop14h 05m

$435

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 1/24

1:15 pm-1:10 pm

2 stops16h 55m

Barcelona-El Prat

Sat 1/31

11:00 am-11:59 pm

1 stop19h 59m

$437

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 1/14

3:50 pm-12:00 pm

1 stop13h 10m

Barcelona-El Prat

Sun 1/25

6:50 am-1:55 pm

1 stop14h 05m

$450

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 2/1

4:05 pm-9:35 am

2 stops34h 30m

Barcelona-El Prat

Tue 2/17

1:35 pm-9:00 pm

2 stops38h 25m

$470

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Thu 1/15

5:04 pm-6:25 pm

2 stops18h 21m

Barcelona-El Prat

Sun 2/1

10:40 am-7:29 pm

1 stop15h 49m

$472

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 3/7

1:33 pm-4:05 pm

2 stops19h 32m

Barcelona-El Prat

Sat 3/14

8:40 pm-5:13 pm

2 stops26h 33m

$482

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Thu 1/15

12:11 pm-11:55 am

1 stop16h 44m

Barcelona-El Prat

Sun 2/1

10:40 am-7:29 pm

1 stop15h 49m

$484

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 2/1

12:01 pm-9:00 am

2 stops13h 59m

Barcelona-El Prat

Tue 2/17

11:00 am-10:05 pm

1 stop18h 05m

$488

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 2/1

4:05 pm-9:35 am

2 stops34h 30m

Barcelona-El Prat

Tue 2/17

6:50 am-3:29 pm

2 stops39h 39m

$490

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 1/28

8:05 am-9:35 am

2 stops18h 30m

Barcelona-El Prat

Sun 2/1

6:50 am-10:58 pm

2 stops23h 08m

$491

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 February. Flight prices, which tend to average around $657, 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 $663.

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 $895 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 $724 on momondo.

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

You could potentially save up to 11% 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?

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 27m

Direct flights

None
The fastest flight from St. Louis to Barcelona-El Prat Airport takes 11h 27m
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

  • 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 27m, 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
DeltaPriceFrom $552Free CancellationRating
7.9
8,007 reviews
Search Delta flights
LufthansaPriceFrom $568Free CancellationRating
6.8
7,626 reviews
Search Lufthansa flights
United AirlinesPriceFrom $574Free CancellationRating
7.4
9,094 reviews
Search United Airlines flights
British AirwaysPriceFrom $589Free CancellationRating
6.7
7,571 reviews
Search British Airways flights
KLMPriceFrom $590Free CancellationRating
7.7
1,432 reviews
Search KLM flights
Air CanadaPriceFrom $624Free CancellationRating
7.1
10,517 reviews
Search Air Canada flights
IberiaPriceFrom $631Free CancellationRating
7.0
3,045 reviews
Search Iberia flights
American AirlinesPriceFrom $632Free CancellationRating
7.2
11,049 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
El Prat de Llobregat
Castelldefels
L'Hospitalet de Llobregat
Tarragona
Santa Susanna
Cambrils
Cadaques
Empuriabrava
Calella
Pineda de Mar
Roses
Badalona
Pals
Palafrugell
Tortosa
La Pineda

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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