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Cheap flights from St. Louis to Barcelona from $269

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 10/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Barcelona

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:40 pm - 5:40 pmSTL  Lambert-St Louis-BCN Barcelona-El Prat
19h 00m1 stop Frankfurt am Main
Multiple Airlines Logo
1:35 pm - 2:30 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
31h 55m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl
$744Multiple Airlines
Wed, Nov 4 - Wed, Nov 11
Air Canada Logo
2:40 pm - 9:20 amSTL  Lambert-St Louis-BCN Barcelona-El Prat
11h 40m1 stop Toronto Pearson Intl
Air Canada Logo
1:15 pm - 2:00 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
31h 45m1 stop Toronto Pearson Intl
$745Air Canada
Sun, Sep 20 - Tue, Oct 6
United Airlines Logo
6:30 am - 9:35 amSTL  Lambert-St Louis-BCN Barcelona-El Prat
20h 05m2 stops Newark Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
1:35 pm - 6:06 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
35h 31m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl
$752United Airlines
Sun, Jan 24 - Fri, Jan 29
United Airlines Logo
6:30 am - 9:35 amSTL  Lambert-St Louis-BCN Barcelona-El Prat
20h 05m2 stops Newark Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
1:35 pm - 12:40 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
30h 05m2 stops Montreal Pierre Elliott Trudeau Intl Newark
$752United Airlines
Sun, Jan 24 - Fri, Jan 29
Air Canada Logo
8:30 am - 9:35 amSTL  Lambert-St Louis-BCN Barcelona-El Prat
18h 05m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
1:35 pm - 2:30 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
31h 55m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl
$756Air Canada
Wed, Nov 4 - Wed, Nov 11
Lufthansa Logo
3:40 pm - 4:30 pmSTL  Lambert-St Louis-BCN Barcelona-El Prat
17h 50m1 stop Frankfurt am Main
Lufthansa Logo
6:50 am - 1:45 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
13h 55m1 stop Frankfurt am Main
$757Lufthansa
Wed, Nov 4 - Wed, Nov 11
Multiple Airlines Logo
10:30 am - 4:00 pmSTL  Lambert-St Louis-BCN Barcelona-El Prat
22h 30m2 stops Boston Logan Intl Frankfurt am Main
Multiple Airlines Logo
8:00 am - 7:45 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
18h 45m2 stops Frankfurt am Main Boston Logan Intl
$760Multiple Airlines
Sun, Sep 6 - Tue, Sep 15
Lufthansa Logo
11:45 am - 8:20 amSTL  Lambert-St Louis-BCN Barcelona-El Prat
13h 35m1 stop Newark
Lufthansa Logo
6:50 am - 1:45 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
13h 55m1 stop Frankfurt am Main
$767Lufthansa
Sun, Jan 24 - Fri, Jan 29
Iberia Logo
11:55 am - 11:25 amSTL  Lambert-St Louis-BCN Barcelona-El Prat
16h 30m2 stops Dallas/Fort Worth London Heathrow
Iberia Logo
12:00 pm - 10:44 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
17h 44m1 stop Philadelphia
$795Iberia
Sun, Jan 24 - Sat, Jan 30
Iberia Logo
11:55 am - 11:25 amSTL  Lambert-St Louis-BCN Barcelona-El Prat
16h 30m2 stops Dallas/Fort Worth London Heathrow
Iberia Logo
12:00 pm - 10:44 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
17h 44m1 stop Philadelphia
$795Iberia
Sun, Jan 24 - Sat, Jan 30

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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
Nov 4
STL3:40 pmLambert-St Louis
17h 50m
1 stop
BCN4:30 pmBarcelona-El Prat
Nov 11
BCN6:50 amBarcelona-El Prat
13h 55m
1 stop
STL1:45 pmLambert-St Louis
$757
Lufthansa
Jan 24
STL11:45 amLambert-St Louis
13h 35m
1 stop
BCN8:20 amBarcelona-El Prat
Jan 29
BCN6:50 amBarcelona-El Prat
13h 55m
1 stop
STL1:45 pmLambert-St Louis
$767
Lufthansa
Oct 6
STL12:20 pmLambert-St Louis
16h 35m
2 stops
BCN11:55 amBarcelona-El Prat
Oct 13
BCN8:00 amBarcelona-El Prat
20h 09m
2 stops
STL9:09 pmLambert-St Louis
$790

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 20
STL2:40 pmLambert-St Louis
11h 40m
1 stop
BCN9:20 amBarcelona-El Prat
Oct 6
BCN1:15 pmBarcelona-El Prat
31h 45m
1 stop
STL2:00 pmLambert-St Louis
$745
Air Canada
Nov 15
STL1:08 pmLambert-St Louis
13h 27m
2 stops
BCN9:35 amBarcelona-El Prat
Nov 18
BCN1:35 pmBarcelona-El Prat
27h 57m
2 stops
STL10:32 amLambert-St Louis
$756
Air Canada
Sep 20
STL8:55 amLambert-St Louis
16h 05m
2 stops
BCN8:00 amBarcelona-El Prat
Oct 6
BCN9:05 amBarcelona-El Prat
17h 55m
2 stops
STL8:00 pmLambert-St Louis
$793

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 8, 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 Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Wed 11/4

3:40 pm-5:40 pm

1 stop19h 00m

Barcelona-El Prat

Wed 11/11

1:35 pm-2:30 pm

2 stops31h 55m

$744

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Sun 9/20

2:40 pm-9:20 am

1 stop11h 40m

Barcelona-El Prat

Tue 10/6

1:15 pm-2:00 pm

1 stop31h 45m

$745

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Sun 1/24

6:30 am-9:35 am

2 stops20h 05m

Barcelona-El Prat

Fri 1/29

1:35 pm-6:06 pm

2 stops35h 31m

$752

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Sun 1/24

6:30 am-9:35 am

2 stops20h 05m

Barcelona-El Prat

Fri 1/29

1:35 pm-12:40 pm

2 stops30h 05m

$752

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Wed 11/4

8:30 am-9:35 am

2 stops18h 05m

Barcelona-El Prat

Wed 11/11

1:35 pm-2:30 pm

2 stops31h 55m

$756

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Wed 11/4

3:40 pm-4:30 pm

1 stop17h 50m

Barcelona-El Prat

Wed 11/11

6:50 am-1:45 pm

1 stop13h 55m

$757

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Sun 9/6

10:30 am-4:00 pm

2 stops22h 30m

Barcelona-El Prat

Tue 9/15

8:00 am-7:45 pm

2 stops18h 45m

$760
Quickest round-trip

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Sun 1/24

11:45 am-8:20 am

1 stop13h 35m

Barcelona-El Prat

Fri 1/29

6:50 am-1:45 pm

1 stop13h 55m

$767

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Sun 1/24

11:55 am-11:25 am

2 stops16h 30m

Barcelona-El Prat

Sat 1/30

12:00 pm-10:44 pm

1 stop17h 44m

$795

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Sun 1/24

11:55 am-11:25 am

2 stops16h 30m

Barcelona-El Prat

Sat 1/30

12:00 pm-10:44 pm

1 stop17h 44m

$795

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

Prices are currently low for flights on this route.

Typical prices usually range from $907 to $1,340.
The lowest price recently found on this route was $744.

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 $558, 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 $902 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 $557 on momondo.

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

You could potentially save up to 21% 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 2026, prices for St. Louis to Barcelona-El Prat Airport flights are approximately 47% 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

12h 50m

Direct flights

None
The fastest flight from St. Louis to Barcelona-El Prat Airport takes 12h 50m
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 12h 50m, 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
8,177 reviews
Search Lufthansa flights
British AirwaysPriceFrom $540Free CancellationRating
6.7
8,153 reviews
Search British Airways flights
DeltaPriceFrom $552Free CancellationRating
7.8
8,502 reviews
Search Delta flights
Air CanadaPriceFrom $624Free CancellationRating
7.1
11,449 reviews
Search Air Canada flights
American AirlinesPriceFrom $629Free CancellationRating
7.1
11,881 reviews
Search American Airlines flights
United AirlinesPriceFrom $634Free CancellationRating
7.4
10,085 reviews
Search United Airlines flights
IberiaPriceFrom $637Free CancellationRating
7.0
3,265 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
Sitges
Salou
Tarragona
Castelldefels
L'Hospitalet de Llobregat
El Prat de Llobregat
Tossa de Mar
Calella
Cadaques
Cambrils
Roses
Badalona
Santa Susanna
Empuriabrava
Calella de Palafrugell
Pals
Palafrugell
Malgrat de Mar
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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